MN Boiler License Questions and Answers 100% Correct

1) Which formula is used to determine the efficiecy of the boiler based on heat absorption? A. A swp = ts xt x eff B. b. output divided by the input C. C. e=mc squared D. D input divided by output “The formula used to determine the efficiency of the boiler based on heat absorption is “”output divided by the input””. This formula calculates the ratio of the useful output energy (such as heat or work) generated by the boiler to the input energy (such as fuel or electricity) supplied to the boiler. By dividing the output by the input, we can determine how effectively the boiler is converting the input energy into useful output energy, which indicates its efficiency.”
2) How many ways can heat be transferred? A. 1 B. 2 C. 3 D. 4 Heat can be transferred in three ways: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between objects or substances. Convection is the transfer of heat through the movement of fluids or gases. Radiation is the transfer of heat through electromagnetic waves. These three methods are the fundamental ways in which heat is transferred from one object to another.
3) How many types of heat are there? A. 1 B. 2 C. 3 D. 4 There are three types of heat: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between objects or substances. Convection is the transfer of heat through the movement of fluids or gases. Radiation is the transfer of heat through electromagnetic waves.
4) How many different types of drafts be there? A. 1 B. 2 C. 3 D. 4 There can be three different types of drafts.
5) How many types of boilers are there? A. 1 B. 2 C. 3 D. 4 Boilers, diverse in types, can be broadly classified into two categories: water boilers and steam boilers. Water boilers are designed to heat water, generating hot water for heating and/or domestic use.
6) How many different types of low water fuel cut are in general use? A. 1 B. 2 C. 3 D. 4 There are two different types of low water fuel cut in general use. The low water cut-off stands out as a paramount safety feature in boilers. Present in both steam and hot water boilers, it plays a vital role in ensuring safety by monitoring and responding to decreases in water levels. These cut-offs can be either mechanical, using a float-type mechanism, or electrical, employing probe-type devices.
7) How many different types of air are there? A. 1 B. 2 C. 3 D. 4
8) A (RPZ) reduced pressure zone or backflow preventer prevents contaminated water from entering the domestic water supply. A. True B. False “A reduced pressure zone or backflow preventer is designed to prevent contaminated water from flowing back into the domestic water supply. This device creates a physical barrier that prevents the reverse flow of water, ensuring that any potential contaminants or pollutants cannot enter the clean water supply. Therefore, the statement “”A (RPZ) reduced pressure zone or backflow preventer prevents contaminated water from entering the domestic water supply”” is true.”
9) Boilers and boiler fittings used in the state of Minnesota must be constructed to what code? A. A N.E.C. B. A.S.M.E. C. City code D. N.F.P. A Boilers and boiler fittings used in the state of Minnesota must be constructed to the A.S.M.E. code. This code, established by the American Society of Mechanical Engineers, sets the standards for the design, construction, and operation of boilers and pressure vessels. Adhering to this code ensures that the boilers and fittings meet safety requirements and operate efficiently.
10) What is the unit called that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler? A. Aqua stat B. Pressure troll C. Vapor stat D. Flow control valve The unit that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler is called an aqua stat. It is responsible for maintaining the desired temperature by activating the burner when the water temperature falls below a certain set point and shutting it off when the temperature reaches the desired level.
11) Heat can be transferred in three ways and they are: A. Latent heat, specific heat, sensible heat B. Conduction , radiation, convection C. Heat flow measured heat flow. The correct answer is conduction, radiation, and convection. These are the three ways in which heat can be transferred. Conduction is the transfer of heat through direct contact between two objects or substances. Radiation is the transfer of heat through electromagnetic waves, such as from the sun. Convection is the transfer of heat through the movement of fluids, such as air or water. These three mechanisms play a crucial role in the transfer of heat and are commonly observed in various everyday situations.
12) The first sequence in the series of automatic bgurner controls is: A. Ignition B. Purging C. To make up the gas switch D. Startup on low fire The correct answer is purging. In the sequence of automatic burner controls, purging is the first step. Purging refers to the process of removing any residual gas or air from the combustion chamber before ignition. This is done to ensure a safe and efficient start-up of the burner. Once purging is completed, the ignition process can take place, followed by making up the gas switch and starting up on low fire.
13) Air that is mixed with the fuel at / or  in the burner is called: A. Secondary air B. Primary air C. Excess air D. Mixable air Primary air refers to the air that is mixed with the fuel at or in the burner. It is the initial air that is supplied to support the combustion process. This air is essential for providing the necessary oxygen for the fuel to burn efficiently. Primary air is typically controlled and adjusted to achieve the desired fuel-air ratio for optimal combustion.
14) Can a low water condition occur in a hot water heating type boiler? A. No, because the boiler is completely filled with water. B. Yes, for numerous reasons C. No , because there is water in the expansion tank A low water condition can occur in a hot water heating type boiler for numerous reasons. Despite the boiler being filled with water, various factors such as leaks, improper water level control, or malfunctioning components can lead to a decrease in water level. This can result in inadequate heat transfer and potentially cause damage to the boiler.
15) Other that a safety relief valve what other safety device should be installed on a hot water heating boiler?a.        city water fill valve  b  low water fuel cut off  c a feed water regulator. A. City water fill valve B. Low water fuel cut off C. A feed water regulator A low water fuel cut off is a safety device that should be installed on a hot water heating boiler. It is designed to shut off the fuel supply to the boiler if the water level drops below a certain point. This helps to prevent the boiler from overheating and potentially causing a dangerous situation. The low water fuel cut off helps to ensure that there is always enough water in the boiler to properly transfer heat and prevent damage to the system.
16) What is the internal resistance to the flow of fuel oil?a.flash point   b viscosity  c fire point   d pour point A. Flash point B. Viscosity C. Fire point D. Pour point The correct answer is viscosity. Viscosity refers to the internal resistance to the flow of a fluid, in this case, fuel oil. It measures the thickness or stickiness of the oil, which affects how easily it can flow through pipes and machinery. A higher viscosity indicates a thicker oil that will flow more slowly, while a lower viscosity indicates a thinner oil that will flow more easily. Therefore, the internal resistance to the flow of fuel oil is determined by its viscosity.
17) Each boiler in a battery (piped together sharing the same common header) must have: A. Two or more safety valves on each boiler B. A main steam stop C. A chimney and breeching to each boiler D. Two or more types of fuel A main steam stop is necessary for each boiler in a battery because it allows for the control and regulation of steam flow. This stop valve is crucial for shutting off the flow of steam in case of emergencies or maintenance.
18) What removes air from a hot water boiler system? A. A siphon device B. Air control C. Flow control D. Relief valve An air control is a device that removes air from a hot water boiler system. When air enters the system, it can cause inefficiencies and decrease the system’s performance. The air control is designed to automatically release trapped air from the system, ensuring that the water circulates properly and efficiently. By removing the air, the air control helps to prevent issues such as airlocks, noise, and reduced heat transfer.
19) When a hydrostatic test of a boiler exceeds the maximum allowable working pressure each safety  valve, if left attached to the boiler, should: A. Be held to its seat by screwing down the compressions spring B. Have its valve disc held to its seat by means of testing clamp or” gag C. Be set above the maximum allowable working pressure “When a hydrostatic test of a boiler exceeds the maximum allowable working pressure, each safety valve should have its valve disc held to its seat by means of a testing clamp or “”gag””. This is done to ensure that the safety valve remains closed and does not release any pressure during the test. By holding the valve disc to its seat, the safety valve can be tested for its ability to hold pressure without the risk of it opening prematurely. This ensures the safety and integrity of the boiler during the test.”
20) Why is a safety valve   sealed? A. To prevent damage to the safety valve B. To prevent tampering with pressure and capacity C. To allow for blow back D. To protect to spring The safety valve is sealed to prevent tampering with pressure and capacity. By sealing the valve, it ensures that no one can adjust or manipulate the pressure or capacity settings, which could potentially lead to dangerous situations or damage to the system. This helps maintain the safety and integrity of the valve, ensuring that it functions properly when it is needed to relieve excess pressure and protect the system.
21) Oxygen in a boiler water can causea  scale  b carry over  c corrosion   d priming A. Scale B. Carry over C. Corrosion D. Priming Oxygen in boiler water can cause corrosion. When oxygen is present in the water, it can react with the metal surfaces inside the boiler, leading to the formation of rust and corrosion. This can weaken the metal and lead to structural damage or failure of the boiler system. Corrosion can also result in the formation of scale deposits, which can further impede the efficiency and performance of the boiler. Therefore, it is important to remove or minimize the presence of oxygen in boiler water to prevent corrosion.
22) In a steam boiler  system, the unit that turns the burner on and off based on steam spessure is the :a  aqustat  bpressure control  c potentiometer  d modulator control A. Aqustat bpressure control B. Pressure control C. Potentiomete D. Modulator control The correct answer is pressure control. In a steam boiler system, the pressure control unit is responsible for turning the burner on and off based on the steam pressure. It ensures that the steam pressure stays within the desired range by activating the burner when the pressure drops below the set point and deactivating it when the pressure exceeds the set point. This helps to maintain a consistent and safe operating pressure in the boiler system.
23) If wate in the gauge glass is not visible because of failure of the feed water supply, what should be done? A. Add water immediately through the manual fill line B. Shut off the fuel to the burner and secure the boiler C. Notify the boiler inspector but continue to run the boiler In this situation, if the water in the gauge glass is not visible due to a failure of the feed water supply, it indicates a potential issue with the boiler. To prevent any further damage or accidents, the correct action would be to shut off the fuel to the burner and secure the boiler. This will help to prevent any potential hazards and ensure the safety of the boiler and surrounding area.
24) What two scales does a pressure control have?A 0 to 20 psi  and 0 to 1 siB  cut in pressure and differential pressureC 0 to 10 psi  and 0 to 20 psiD none of these A. 0 to 20 psi and 0 to 15 psi B. Cut in pressure and differential pressure C. 0 to 10 psi and 0 to 20 ps D. None of these
25) What is the minimum size bottom blowdown line used on a mini or miniature boiler? A. ¼ inch B. ½ inch C. ¾ inch D. 1 inch The minimum size bottom blowdown line used on a mini or miniature boiler is ½ inch. This size is determined based on the requirements of the boiler and the amount of blowdown that needs to be discharged. A smaller size would not be sufficient to handle the flow of blowdown, while a larger size would be unnecessary and potentially wasteful. Therefore, a ½ inch bottom blowdown line is the appropriate choice for a mini or miniature boiler.
26) What is the minimum size drain required on a water colum?A 1 inch  b ¾ inch  c ¼ inch  d ½ inch A. 1 inch B. ¾ inch C. ¼ inch D. ½ inch The minimum size drain required on a water column is ¾ inch. This means that the drain should have a diameter of at least ¾ inch in order to effectively drain the water column. A drain of this size will ensure that the water can flow out smoothly and prevent any potential clogging or blockages.
27) What conditions are necessare to cause a furnace explosion?Atoo much aire b not enough air c accumulation of unburned fuel, oxygen and an igition source d to much fuel A. Too much aire B. Not enough air C. Accumulation of unburned fuel, oxygen and an igition source D. To much fuel A furnace explosion can occur when there is an accumulation of unburned fuel, oxygen, and an ignition source. This combination creates a potentially explosive environment where the fuel and oxygen can rapidly combust when ignited. The presence of too much or not enough air may affect the efficiency of combustion, but it is not the primary cause of a furnace explosion. Similarly, having too much fuel alone is not enough to cause an explosion without the presence of unburned fuel, oxygen, and an ignition source.
28) The low water cut out should be tested: A. Daily B. Weekly C. Monthly D. Once a year The low water cut out should be tested daily to ensure its proper functioning. This is important because the low water cut out is responsible for shutting off the equipment when the water level drops below a safe level. Regular testing helps to identify any issues or malfunctions early on, preventing potential damage to the equipment and ensuring the safety of the system.
29) Can high pressure safety valve be used on the sam boiler for low pressure? A. Yes by changing the spring pressure B. Cannot be used.. C. Only by tightening the spring pressure A high pressure safety valve is specifically designed to release excess pressure in a high pressure system. It is not suitable for use in a low pressure system because it may not open at the desired pressure and may not provide adequate protection. Tightening the spring pressure may not be sufficient to convert it into a low pressure safety valve. Therefore, a high pressure safety valve cannot be used on the same boiler for low pressure.
30) Gauge pressure plus 14.7 psi is called what?A atmospheric pressureB positive pressureC  absolute pressureD operating pressure A. Atmospheric pressure B. Positive pressure C. Absolute pressure D. Operating pressure Absolute pressure is the sum of gauge pressure and atmospheric pressure. Gauge pressure is the pressure measured relative to atmospheric pressure, so adding atmospheric pressure to it gives the absolute pressure. Positive pressure refers to any pressure above atmospheric pressure, but it does not specifically refer to the sum of gauge pressure and atmospheric pressure. Operating pressure is a general term that can refer to any pressure used in a specific operation or system. Therefore, the correct answer is absolute pressure.
31) The unit that shuts off the burner in the event of low water is:a  feed water pumpb  safety valvec  low water fuel cut out  d  operating contrb  safety valveol A. Feed water pump B. Safety valve C. Low water fuel cut out D. Operating control “The correct answer is “”low water fuel cut out””. This unit is responsible for shutting off the burner in the event of low water in the system. It is designed to prevent damage to the burner and ensure safety by cutting off the fuel supply when the water level drops below a certain threshold. The feed water pump is responsible for supplying water to the boiler, the safety valve is designed to release excess pressure, and the operating control helps regulate the overall operation of the system.”
32) The evaporation of 34.5 pounds of water per hour from and at a temperature of 212 f    is defined as: A. The latent heat of evaporation B. One boiler horsepower C. An evaporation One boiler horsepower is defined as the amount of heat energy required to evaporate 34.5 pounds of water per hour from and at a temperature of 212°F.
33) When a safety valve opens and closes rapidly it is referred to as: a  chatteringb  poppingc  blow backd  pressuring A. Chattering B. Popping C. Blow back D. Pressuring Chattering is the correct answer because when a safety valve opens and closes rapidly, it creates a chattering sound. This can occur due to excessive pressure fluctuations or improper valve settings. Chattering can be detrimental as it can cause wear and tear on the valve, leading to potential failure.
34) Furnace explosings are caused by a build up of combustible gases, or vapors in the combustion chamber, what is the term used to remedy this condition?A  clearingB  modulatingC  purgingD huddling A. Clearing B. Modulating C. Purging D. Huddling “When a furnace experiences a build-up of combustible gases or vapors in the combustion chamber, the term used to remedy this condition is “”purging.”” Purging involves the process of removing or flushing out the accumulated gases or vapors from the combustion chamber before igniting the furnace. This is done to ensure that any potential explosion risk is minimized and the furnace operates safely.”
35) In order form a fuel to burn it must be heated to: A. 212 f B. At least 1000 f C. Its ignition temperture In order for a fuel to burn, it must be heated to its ignition temperature. This is the minimum temperature at which the fuel can ignite and sustain a combustion reaction. Therefore, heating the fuel to any temperature below its ignition temperature will not result in burning.
36) Why is a pigtail or siphon required in steam pressure gauge lines?Ato prevent water hammerB  to protect the gauge from a high temperatureC  to reduce the pressure A. To prevent water hamme B. To protect the gauge from a high temperature C. To reduce the pressure A pigtail or siphon is required in steam pressure gauge lines to protect the gauge from a high temperature. Steam is at a high temperature and can cause damage to the gauge if it directly comes in contact with it. The pigtail or siphon acts as a barrier, allowing the steam to condense and cool before reaching the gauge, thus protecting it from the high temperature.
37) In a steam boiler system, what is the term used for replacing the water that has been lost by blowng down the boiler or through leaks in the system?A  make up waterB  condensateC  feed replacement A. Make up water B. Condensate C. Feed replacement Make up water refers to the water that is added to a steam boiler system to replace the water that has been lost due to blowing down the boiler or through leaks in the system. This is necessary to maintain the desired water level and ensure proper functioning of the boiler. Condensate, on the other hand, refers to the water that is formed when steam condenses, and feed replacement is not a commonly used term in this context.
38) On a steam boiler system, why are bottom blow down valves installed at the lowest point of the waterside of boilers?A  to remove sludge and sedimentB  to remove make up waterC  to prevent corrosion A. To remove sludge and sediment B. To remove make up water C. To prevent corrosion Bottom blow down valves are installed at the lowest point of the waterside of boilers to remove sludge and sediment. Over time, sludge and sediment can accumulate in the boiler, which can negatively affect its efficiency and performance. By installing bottom blow down valves at the lowest point, these impurities can be easily drained out of the system, preventing any potential damage or blockages. Regular removal of sludge and sediment helps maintain the boiler’s functionality and prolong its lifespan.
39) Heating surface is defined as: A. A hot surface B. The surface used for heating C. Water on one side hot gas on the other side. “The correct answer is “”water on one side hot gas on the other side.”” This definition refers to the concept of a heating surface, which is a surface that separates water and hot gas in a heat exchanger. The heat from the hot gas is transferred to the water through this surface, resulting in the heating of the water.”
40) If a steam trap on a radiator of a steam heating system becomes water logged, what will happen? A. The radiator will overheat B. The radiator will not heat the room properly C. The steam trap will leak If a steam trap on a radiator of a steam heating system becomes waterlogged, it means that the trap is unable to effectively remove condensate from the radiator. This can result in reduced or blocked steam flow to the radiator, causing it to not heat the room properly. The waterlogged trap prevents the proper functioning of the radiator, leading to inadequate heating of the room.
41) In a fire tube boiler, the water A. Surrounds the tubes B. Is inside the tubes C. Both inside and outside of the tubes In a fire tube boiler, the water surrounds the tubes. This means that the tubes are immersed in the water, and the heat from the combustion gases passes through the walls of the tubes to heat the water. This design allows for efficient heat transfer and is commonly used in smaller, low-pressure boilers.
42) What chemical is used as an oxygen scavenger?A   sodium sulfiteB   sodium hydroxideC   sodium nitrite A. Sodium sulfite B. Sodium hydroxide C. Sodium nitrite Sodium sulfite is used as an oxygen scavenger. It reacts with oxygen to form sodium sulfate, which helps to remove oxygen from the environment. This is commonly used in industries such as food packaging and water treatment to prevent oxidation and preserve the quality of products. Sodium hydroxide and sodium nitrite are not typically used as oxygen scavengers.
43) When tow bottom blow down valves are used on a steam boiler, what valve is located closes to the boiler shell?A   the quick opening valveB  the slow opening valveC   modulating A. The quick opening valve B. The slow opening valve C. Modulating The correct answer is the quick opening valve. When two bottom blow down valves are used on a steam boiler, the quick opening valve is located closest to the boiler shell. This valve is designed to quickly release a large amount of water and steam pressure from the boiler to remove impurities and prevent excessive buildup. The slow opening valve, on the other hand, is used to control the rate of blow down and ensure a gradual release of pressure. The modulating valve is not typically used for bottom blow down operations.
44) Purpose of a safety valve on a steam boiler is to A. Regulate or control an even amount of steam pressure B. Regulate the blow back C. Prevent the pressure in a steam boiler from exceeding its maximum allowable working pressure. The purpose of a safety valve on a steam boiler is to prevent the pressure from exceeding its maximum allowable working pressure. This is crucial to ensure the safety of the boiler and prevent any potential damage or accidents that could occur if the pressure were to exceed safe limits. By automatically releasing excess pressure, the safety valve helps to maintain a safe and controlled operating environment for the steam boiler.
45) The control designed as a safety back up , should the pressure control fail is: A. A modulating control B. An end switch C. A sail switch D. A high limit control A high limit control is designed to act as a safety backup in case the pressure control fails. It is responsible for monitoring and controlling the temperature or pressure of a system, and if it exceeds a certain preset limit, it will shut down the system to prevent any potential damage or hazards. This ensures that the system operates within safe limits and protects against any potential failures or malfunctions.
46) “The capacity of a safety valve used on a steam boiler is measured in:””a  pounds of steam shown on the steam gaugeb   pounds of steam that can be discharged in one hourc    pound of steam increased per min” A. Pounds of steam shown on the steam gauge B. Pounds of steam that can be discharged in one hour C. Pound of steam increased per min The capacity of a safety valve used on a steam boiler is measured in pounds of steam that can be discharged in one hour. This means that the safety valve is designed to release a certain amount of steam per hour in order to prevent the pressure in the boiler from exceeding safe limits. By measuring the capacity in terms of pounds of steam discharged in one hour, it allows for an accurate assessment of the safety valve’s ability to handle the steam flow and maintain a safe operating pressure.
47) How does a pressure control attached to the steam space of a boiler control the burner operation? A. Burner starts on pressure decreased stop on pressure increase B. Burner starts on pressure increase stop on pressure decrease C. Starts burner on pressure increaseA burner starts on pressure decreased stop on pressure increase D. Stops burner on pressure The pressure control attached to the steam space of a boiler is responsible for regulating the burner operation. When the pressure decreases below a certain set point, the control initiates the burner to start, ensuring that the pressure is maintained within the desired range. On the other hand, when the pressure increases above the set point, the control signals the burner to stop, preventing the pressure from exceeding the safe limit. This control mechanism helps maintain the desired pressure level in the boiler and ensures safe and efficient operation.
48) When could stop valves be eliminated for a single hot water heating boiler? A. “When coud stop valves be eliminated for a single hot water heating boiler?
A when the pressure is less then 30 psi
B when the boiler is located above the system
C when the pressure is less then 15 psi
A when the pressure is less then 30 ps” B. When the boiler is located above the system C. When the pressure is less then 15 psi Stop valves are typically used in hot water heating systems to control the flow of water. However, if the boiler is located above the system, gravity can be used to circulate the hot water without the need for stop valves. In this case, the pressure differential created by the elevated boiler is sufficient to circulate the water through the system. Therefore, stop valves can be eliminated in this scenario.
49) In some heating systems the circulation pump is controlled by the? A. Water pressure B. Thermostat C. Water head pressure The circulation pump in some heating systems is controlled by the thermostat. The thermostat is responsible for monitoring the temperature in the system and signaling the pump to circulate the water when the desired temperature is not reached. This ensures that the heating system operates efficiently by only activating the pump when necessary, based on the temperature settings determined by the thermostat.
50) What action should an operating engineer take if a defect is discovered in a boiler requiring repairs not of a routine nature? A. Notify the boiler inspector B. Notify the sheriff C. Notify another engineer in the plant If a defect is discovered in a boiler requiring repairs that are not of a routine nature, the appropriate action for an operating engineer to take would be to notify the boiler inspector. This is because the boiler inspector is responsible for ensuring the safety and compliance of boilers. By notifying the inspector, they can assess the defect and determine the necessary repairs or actions to be taken to address the issue effectively.
51) Boiler are considered low pressure when: A. Steam boiler are not over 15 psi and liquid boiler are not over 160 psi and 250 deg F B. Steam boilers not over 30 psi hot water boiler not over 50 psi C. Steam boiler not over 20 psi liquid boiler not over 100 psi 212 deg F The correct answer states that boilers are considered low pressure when steam boilers are not over 15 psi and liquid boilers are not over 160 psi and 250 deg F. This means that if the pressure in a steam boiler is below 15 psi or the pressure in a liquid boiler is below 160 psi and the temperature is below 250 deg F, then the boiler is classified as low pressure.
52) What boiler license is required for operating boiler as a shift engineer in a plant having three boiler each having 1660 sq ft of heating surface? A. Special B. Second C. First D. Ch “The second option, “”second,”” is the correct answer because operating a boiler as a shift engineer typically requires a Second Class Boiler Operator License. The heating surface area of the boilers, in this case, is 1660 sq ft, which falls within the criteria for a Second Class license.”
53) A boiler weighs 1000 pounds empty filling the boiler with water to its normal operating level requires 500 gal.  What is the total weight of the boiler and water?A 4165B5165C  5700D  4700 A. 4165 B. 5165 C. 5700 D. 4700 The total weight of the boiler and water can be calculated by adding the weight of the empty boiler to the weight of the water. Since the empty boiler weighs 1000 pounds and filling it with water requires 500 gallons, we need to determine the weight of 500 gallons of water. The weight of water can be calculated by multiplying the volume (500 gallons) by the density of water (approximately 8.34 pounds per gallon). Therefore, the weight of the water is 500 gallons * 8.34 pounds per gallon = 4170 pounds. Adding this to the weight of the empty boiler (1000 pounds) gives us a total weight of 4170 pounds + 1000 pounds = 5170 pounds. Therefore, the correct answer is 5165 pounds.
54) What type of valve is permitted to shut off a steam gauge? A. Gate valve B. A tee or lever handle valve C. Globe valve A tee or lever handle valve is permitted to shut off a steam gauge because it provides a quick and easy way to control the flow of steam. The tee or lever handle allows for easy operation, allowing the valve to be fully closed to stop the flow of steam to the gauge. This type of valve is commonly used in steam systems for its convenience and effectiveness in shutting off the flow.
55) What is a draft gauge? A. Pyrometer B. Manometer C. Flow gauge A manometer is a device used to measure the pressure of a fluid, either liquid or gas. It consists of a U-shaped tube filled with a liquid, such as mercury, and the pressure of the fluid being measured causes the liquid to rise or fall in one side of the tube. By measuring the difference in height between the two sides of the tube, the pressure can be determined. In the context of the given question, a manometer is the most appropriate answer because it is specifically designed to measure pressure, which is not the case for a pyrometer or flow gauge.
56) When adding water to a hot water heating system if the pointer on the pressure gauge rises quickly it is an indication of A. Too much air in the system B. Water logged expansion tank C. Water temperature too high The correct answer is too much air in the system. When adding water to a hot water heating system, you want to avoid introducing air into the system, as this will reduce the water pressure and affect the efficiency of the heating. Air can enter the system through leaks, vents, or blow-off valves. If you notice that the pointer on the pressure gauge rises quickly when you add water, it means that there is a lot of air in the system and you need to bleed it out. Bleeding is a process of releasing air from the system by opening and closing valves on each radiator or convector until the pressure drops to normal levels. Bleeding should be done after filling up the boiler with water and before turning on any radiators or heating devices.
57) The maximum temperature to be carried on a low pressure hot water boiler is A. 212f B. Less then 250 f C. Less then 214 f “The maximum temperature that can be carried on a low pressure hot water boiler is stated to be “”less than 250°F.”” This means that the temperature should not exceed 250°F to ensure the safe operation of the boiler.”
58) The popping pressure of a safety relief valve on a low pressure hot water heating boiler cannot exceed. A. 160 psi B. 15 psi C. 212 psi D. 30 psi The popping pressure of a safety relief valve on a low pressure hot water heating boiler cannot exceed 160 psi. This means that the valve is designed to release pressure from the boiler when it reaches or exceeds 160 psi, preventing any potential damage or explosion. This limit ensures the safe operation of the boiler and protects against excessive pressure buildup.
59) The bottom blowdown line on a steam boiler system is located at the A. Lowest point of the fireside of a steam boiler B. Lowest point of the waterside of a steam boile C. Lowest pint of the water colum drain line The bottom blowdown line on a steam boiler system is located at the lowest point of the waterside of a steam boiler. This is because the blowdown line is used to remove sediment and impurities that settle at the bottom of the boiler. By locating it at the lowest point of the waterside, it ensures that the blowdown line can effectively remove these impurities and maintain the efficiency and performance of the boiler system.
60) How can you tell the maximum allowable working pressure on any boiler? A. Look at the maximum btu input on the burner B. Look at the setting of the safety valve or safety relif valve. C. Record the pressure regulator setting The maximum allowable working pressure on a boiler can be determined by looking at the setting of the safety valve or safety relief valve. These valves are designed to release excess pressure from the boiler to prevent any potential hazards or damage. Therefore, the setting of these valves indicates the maximum pressure that the boiler can safely handle. By checking the setting of the safety valve or safety relief valve, one can determine the maximum allowable working pressure on the boiler.
61) For the purpose of rating boiler horsepower for engineer license classifications only   how man sq ft of heating surface shall be considered equivalent to one boiler horsepower for conventional boilers? A. 2 ½sq ft B. 10 sq ft C. 5 sq ft D. 5 sq ft In order to rate boiler horsepower for engineer license classifications, 10 square feet of heating surface shall be considered equivalent to one boiler horsepower for conventional boilers.
62) In a hot water boiler system, what valve is installed to reduce incoming city water pressure to the hot water boiler operating pressure? A. Back flow preventor valve B. Safety relif valve C. Pressure reducing valve D. Safety valve A pressure reducing valve is installed in a hot water boiler system to reduce the incoming city water pressure to the operating pressure of the boiler. This valve ensures that the pressure in the boiler remains at a safe and controlled level, preventing any damage or malfunction. By reducing the pressure, the valve helps to regulate the flow of water into the boiler, maintaining optimal conditions for heating the water.
63) What devices could be found in a hot water boiler heating system? A. Safety relief valve, temperature pressure gauge, aua stat, and expansion or compression tank. B. Safety valve, pressure control, , pressure gauge, aqua stat feed, water pump The devices that could be found in a hot water boiler heating system include a safety relief valve, temperature pressure gauge, aqua stat, and an expansion or compression tank. These devices are essential for ensuring the safe and efficient operation of the boiler system. The safety relief valve helps to release excess pressure, the temperature pressure gauge monitors the temperature and pressure levels, the aqua stat controls the water temperature, and the expansion or compression tank helps to regulate the system’s water volume.
64) If you fail a state of Minnesota boiler operators license exam ho long must you wait before you can retake the exam? A. 30 days B. 20- days C. 10 days If you fail a state of Minnesota boiler operators license exam, you must wait for 30 days before you can retake the exam.
65) Hat is a boiler called that furnishes hot  to be used externally to itself? A. Water to water heat exchanger B. A cast iron boiler C. A hot water supply boiler A hot water supply boiler is a type of boiler that provides hot water to be used externally to itself. Unlike other types of boilers, such as a water to water heat exchanger or a cast iron boiler, a hot water supply boiler specifically focuses on supplying hot water for external use. This distinction sets it apart from other types of boilers that may have different purposes or functions.
66) What is the maximum size safety valve that may be installed on a low pressure  boiler? A. 4 ½ B. 3 inch C. 2 ½ D. I inch The maximum size safety valve that may be installed on a low-pressure boiler is 4 ½ inches. This means that the safety valve should have a diameter of 4 ½ inches to effectively release excess pressure and prevent any potential hazards.
67) What does a flue gas analyzer measure? A. The percentages of carbon monoxide carbon dioxide and oxygen. B. Amount of nitrogen in the flue gas C. Amount of sulfur dioxide in the flue gases A flue gas analyzer is a device used to measure the percentages of carbon monoxide, carbon dioxide, and oxygen in the flue gas. It is commonly used in industries and heating systems to ensure proper combustion and monitor the efficiency of the combustion process. By measuring these gases, the analyzer can provide valuable information about the fuel-to-air ratio, combustion efficiency, and potential pollutants emitted from the combustion process.
68) 65      what is recommended for boilers that will be out of service for a long time and a possibility of freezing? A. Blank off the flanges and gag the safety valve B. B a dry lay up C. C wash the boiler once a week A dry lay up is recommended for boilers that will be out of service for a long time and have a possibility of freezing. This involves blanking off the flanges and gagging the safety valve to prevent any moisture from entering the boiler. This method helps to protect the boiler from corrosion and damage caused by freezing temperatures. Washing the boiler once a week or other methods may not be sufficient to prevent freezing and potential damage.
69) In a hot water heating system what would prevent the hot water from circulation through a room heating unit? A. Trapped air B. Water too hot C. Back flow preventor valve Trapped air can prevent hot water from circulating through a room heating unit in a hot water heating system. When air gets trapped in the system, it can create air pockets that block the flow of hot water. This can result in reduced or no heat being delivered to the room. To ensure proper circulation, it is important to regularly bleed the air from the system using air vents or valves.
70) In a hot water heating system what would prevent the hot water from circulation through a room heating unit? A. Trapped air B. Water too hot C. Back flow preventor valve Trapped air can prevent the hot water from circulating through a room heating unit in a hot water heating system. When air becomes trapped in the system, it creates an airlock that blocks the flow of hot water. This can lead to reduced or no heat being delivered to the room. To resolve this issue, the trapped air needs to be released from the system through a process called bleeding or purging.
71) Draft is the difference in pressure between tow points that cause air? A. True B. False The given statement is true. Draft refers to the difference in pressure between two points that causes air movement. It is commonly experienced when there is a flow of air due to a pressure difference, such as when a door is opened or when wind blows through an open window. The pressure difference creates a draft, which can be felt as a breeze or movement of air.
72) What is used to ensure that all of the fuel is properly burned in a boiler and thus attain a better efficiency in heat release? A. Excess air B. Lower temperature air C. A double insulated boiler Excess air is used to ensure that all of the fuel is properly burned in a boiler and attain better efficiency in heat release. By introducing more air than the stoichiometric ratio requires, there is an excess of oxygen available for combustion. This ensures that all the fuel is completely burned, minimizing the formation of unburned fuel and reducing the production of harmful pollutants. Additionally, excess air helps to control the temperature inside the boiler, preventing overheating and potential damage. Overall, using excess air improves the combustion process, leading to higher efficiency and cleaner emissions.
73) If a deposit of carbon appears on the rear wall of the combustion chamber of the mechanical pressure type oil burner  a good procedure is to: A. Enlarge the combustion chamber B. Cut down the air supply C. Try a wider angle nozzle When a deposit of carbon appears on the rear wall of the combustion chamber of the mechanical pressure type oil burner, trying a wider angle nozzle would be a good procedure. This is because a wider angle nozzle can help to distribute the fuel and air mixture more evenly, promoting better combustion and reducing the likelihood of carbon deposits forming on the walls. By adjusting the angle of the nozzle, the fuel spray pattern can be optimized to prevent carbon buildup and ensure efficient combustion.
74) The rapid burning of fuel and oxygen that results in the release of heat is called A. Purging B. Atomization C. Combustion Combustion refers to the rapid burning of fuel and oxygen, which leads to the release of heat. During combustion, the fuel reacts with oxygen in a chemical process known as oxidation, producing heat, light, and various byproducts such as carbon dioxide and water vapor. This process is commonly used in engines, power plants, and other combustion systems to generate energy.
75) A slow opening valve used as a bottom blow down valve requires how many complete 360 degree turns to open? A. 3 turns B. 4 turns C. 5 turns A slow opening valve used as a bottom blow down valve requires 5 complete 360 degree turns to open. This means that to fully open the valve, it needs to be turned five times in a complete circle. The slow opening feature is likely designed to control the flow rate of the blow down process, allowing for a gradual release of pressure or fluid.
76) In a steam boiler system   a possible water hammer   is caused by: A. Carryover B. A plugged water column C. A pulsating flame Water hammer in a steam boiler system can be caused by carryover. Carryover refers to the situation when water droplets are carried along with the steam and enter the steam distribution system. When these water droplets encounter a sudden change in direction or a valve closure, they can cause a rapid pressure surge, resulting in water hammer. This can lead to damage to the system and potential safety hazards.
77) Hen applying a hydrostatic test on a boiler the water temperatures should be?115 f45 f70 f212 f A. 115 f B. 45 f C. 70 f D. 212 f When applying a hydrostatic test on a boiler, the water temperatures should be at 70°F. This is because a hydrostatic test is conducted to check the integrity of the boiler and its components under pressure. The test is performed with water, and the temperature of the water should be kept at 70°F to ensure accurate results and prevent any damage to the boiler.
78) The valve that is installed when it is  desirable to control the rate at which water flows is called a A. Stop and check valve B. Globe valve C. Safety valve D. Gate valve A globe valve is the correct answer because it is specifically designed to control the rate at which water flows. It has a movable disk that can be adjusted to regulate the flow of water. This type of valve is commonly used in applications where precise control over the flow rate is necessary, such as in water treatment plants or industrial processes. Unlike other valves listed, a globe valve allows for fine-tuning of the flow, making it the most suitable option for controlling water flow rate.
79) If a condensate pump becomes steam bound and stops delivering water   what could be done to correct the problem? A. Close the suction line B. Increase head pressure C. Increase water temperature Increasing the head pressure can help to correct the problem of a steam bound condensate pump. When a pump becomes steam bound, it means that the pump is unable to remove the condensate due to the presence of steam. By increasing the head pressure, the pump is able to generate more force and overcome the steam, allowing it to deliver water again. This can be achieved by adjusting the discharge valve or increasing the height of the discharge line.
80) On a steam boiler  what  is the unit called that is used to reduce the amount of movement of the water so the boiler operator can get an accurate reading of the water level in the gauge glass? Water column A water column is a unit used in a steam boiler to reduce the movement of water, allowing the boiler operator to obtain an accurate reading of the water level in the gauge glass. The water column helps to stabilize the water level and prevent fluctuations that could affect the accuracy of the gauge glass reading. It provides a steady column of water that acts as a buffer, ensuring a consistent and reliable measurement of the water level in the boiler.
81) 77      after repair work is done on the boiler a test is used to chek for leaks:  what king of test is used? A. R a flame scanner test B. S accumulation tes C. T atmospheric test D. U hydrostatic test After repair work is done on the boiler, a hydrostatic test is used to check for leaks. This test involves filling the boiler with water and pressurizing it to a specific level. If there are any leaks, they will be detected by the water escaping from the boiler. This test is commonly used to ensure the integrity and safety of the boiler after repairs have been made.
82) 78      the dial on a pressure gauge used on a low pressure boiler should be graduated: A. V to the maximum allowable working pressure B. W one and one half to two times the maximum allowable working pressure C. X threee times the maximum allowable working pressure The dial on a pressure gauge used on a low pressure boiler should be graduated one and one half to two times the maximum allowable working pressure. This is because the pressure gauge should be able to accurately measure the pressure within the boiler, and having a graduated dial that is larger than the maximum allowable working pressure ensures that the gauge can accurately display the pressure within the safe operating range of the boiler. Graduating the dial to a higher range also provides a safety margin, allowing for any fluctuations or spikes in pressure without exceeding the maximum allowable working pressure.
83) 79      the three basic tpes of low pressure boiler are: A. Y fire box, fire tube, fire flue B. Z water channel , fire tube, updraf C. Aa fire tube, water tube cast iron sectional “The correct answer is “”fire tube, water tube cast iron sectional.”” This answer correctly identifies the three basic types of low-pressure boilers. A fire tube boiler is a type of boiler where hot gases from a fire pass through one or more tubes running through a sealed container of water. A water tube boiler is a type of boiler where water circulates in tubes heated externally by the fire. Cast iron sectional boilers are made up of individual cast iron sections that are bolted together, allowing for easy assembly and disassembly.”
84) 80      if idle boilers  are left filled with water, what precaution should be taken to prevent corrosion an oxygen pitting? A. A keep the boiler water warm B. B keep the boiler water properly treated C. C blow down the boiler once a day D. D remove chemicals from boiler water To prevent corrosion and oxygen pitting in idle boilers, it is important to keep the boiler water properly treated. Proper treatment involves adding chemicals to the water to control pH levels and prevent the formation of scale and corrosion. This helps to maintain the water quality and prevent any damage or corrosion to the boiler system. Keeping the boiler water warm (option A) may help to some extent, but it is not sufficient to prevent corrosion and oxygen pitting. Blowing down the boiler once a day (option C) can help remove impurities, but it is not enough to prevent corrosion. Removing chemicals from the boiler water (option D) would leave the water untreated and more susceptible to corrosion. Therefore, the best precaution is to keep the boiler water properly treated.
85) “81      the term used for the evaporative capacity output of a steam boiler is expressed in :
a” A. A a pounds per minute B. B pounds per day C. C pounds per week D. D pounds per hour The term used for the evaporative capacity output of a steam boiler is expressed in pounds per hour. This means that the amount of steam produced by the boiler is measured in pounds per hour.
86) 82      the term used when small particles of water are carried over into the steam lines is called: A. Aa water separation B. B priming C. C contamination D. D steam separation Priming is the term used when small particles of water are carried over into the steam lines. This can occur when the water level in a boiler is too high, causing the water to be carried along with the steam. Priming can lead to reduced efficiency and potential damage to equipment, so it is important to properly control the water level in a boiler to prevent this.
87) 83      what boiler license is required to be in charge of a boiler plant having two boilers  each having 2500  sq ft of heating surface? A. A special eng B. B 2nd C. C 1st class D. D ch eng To be in charge of a boiler plant with two boilers, each having 2500 sq ft of heating surface, a 1st class boiler license is required. This license indicates that the individual has the necessary knowledge and skills to operate and maintain high-pressure boilers. They are responsible for ensuring the safe and efficient operation of the boilers, monitoring pressure and temperature levels, conducting regular inspections and maintenance, and troubleshooting any issues that may arise. A 1st class boiler license is the highest level of certification for boiler operators.
88) “76      for each eng. Lic. Fill in the blanks, indicating how large of a boiler they can be in charge of:
a a  sp eng  __________________hsp
b  2nd cl  _______________________hsp
c  1st cl. ____________________hsp
d  ch eng. _______________________hsp” 50 100 500 unlimited The given question is asking for the maximum size of a boiler that each type of engineer’s license allows them to be in charge of. The correct answer indicates that a special engineer can be in charge of a boiler with a maximum size of 50 horsepower (hsp), a second-class engineer can be in charge of a boiler with a maximum size of 100 hsp, a first-class engineer can be in charge of a boiler with a maximum size of 500 hsp, and a chief engineer can be in charge of a boiler with an unlimited size.
89) 85when testing the low water fuel cutoff on a steam boiler   the burner shoud be firing why? A. A to see if the flame pops B. B to see if the burner shuts off C. C to make sure the burner starts in the low fire position. When testing the low water fuel cutoff on a steam boiler, the burner should be firing to see if it shuts off. This is important because the low water fuel cutoff is a safety device that shuts off the burner if the water level in the boiler drops below a certain level. By testing if the burner shuts off when the low water level is detected, it ensures that the safety mechanism is functioning properly and will prevent any potential accidents or damage to the boiler.
90) 86how often should safety valves be tested on a low pressure boiler? A. A daily B. B annually C. C weekly D. D monthly Safety valves on a low-pressure boiler should be tested monthly. This is important to ensure that the valves are functioning properly and can release excess pressure when needed. Regular testing helps to prevent the buildup of pressure that could potentially lead to a dangerous situation. By testing the safety valves monthly, any issues or malfunctions can be identified and addressed promptly, ensuring the safety of the boiler and those working with it.
91) 87what is the term used when a safety valve pops open when the pressure exceeds the maximum allowable working pressure   and stays open until a sufficient amount to  steam is released and when there is a de drop in pressure inside the boiler? A. A hang up B. B cut out pressure C. C blow down blow back D. D over pressure When a safety valve pops open when the pressure exceeds the maximum allowable working pressure and stays open until a sufficient amount of steam is released, it is known as blow down. Blow back refers to the situation when there is a drop in pressure inside the boiler. Therefore, the correct answer is C.
92) 88      what is the minimum size pipe that is used to connect the water column to the boiler? A. A ½ B. B ¾ C. C 1 in D. D 2 in The minimum size pipe that is used to connect the water column to the boiler is 1 inch.
93) “89      the most important safety device on a steam or liquid boiler is what?
A  the steam or altitude gauge
B  the water column
C  the gauge glass
D  the safety of safety relief valve” A. A the steam or altitude gauge B. B the water column C. C the gauge glass D. D the safety of safety relief valve The safety relief valve is the most important safety device on a steam or liquid boiler because it is responsible for releasing excess pressure and preventing the boiler from exploding or causing any other catastrophic damage. It is designed to automatically open when the pressure inside the boiler exceeds a certain limit, allowing the excess pressure to escape and ensuring the safety of the boiler and its surroundings. The steam or altitude gauge, water column, and gauge glass are also important components for monitoring and maintaining the proper functioning of the boiler, but the safety relief valve is the ultimate safeguard against potential disasters.
94) 90      where is the breeching located at for a steam or hot water boiler? A. A below the fire box B. B the duct in front of the boiler C. C between the boiler and the chimney The breeching is located between the boiler and the chimney. The breeching is a duct or pipe that connects the boiler to the chimney, allowing the combustion gases to be safely vented out of the system. It is important for the breeching to be properly installed and maintained to ensure the efficient and safe operation of the boiler.
95) 91 what boiler lic. Is required for operating boilers as a    shift eng    in a plant having three boilers with heating surfaces of 1500 sq ft   1500 sq ft    and 2000sq ft? A. A ch eng lic B. B 1st cl C. C 2nd class D. D sp eng ic. A 2nd class boiler license is required for operating boilers as a shift engineer in a plant with three boilers. The heating surfaces of the boilers are given as 1500 sq ft, 1500 sq ft, and 2000 sq ft.
96) 92what three things are required to support combustion? A. A fuel, an arc, and time B. B fuel, heat, and oxygen C. C fuel, an arc, and temperature To support combustion, three things are required: fuel, heat, and oxygen. Fuel provides the substance that will burn, heat provides the energy required to initiate and sustain the combustion process, and oxygen acts as the oxidizing agent that reacts with the fuel to release energy in the form of heat and light. Without any one of these three elements, combustion cannot occur.
97) 93      what can result if condensate is picked up with the steam as it travels through the main steam branch lines? A. A steam bound piping B. B water hammer C. C steam line will be cooler D. D steam line will be hotter If condensate is picked up with the steam as it travels through the main steam branch lines, it can result in water hammer. Water hammer is a sudden increase in pressure caused by the rapid condensation of steam, which can lead to loud banging or knocking noises and potential damage to the piping system.
98) “94      what are used to direct the flow of gases through out the boiler?
A” A. A combustion controls B. B fire tubes C. C baffles Baffles are used to direct the flow of gases throughout the boiler. They are plates or tubes that are placed inside the boiler to guide the gases in a specific direction. Baffles help to improve heat transfer and increase the efficiency of the boiler by ensuring that the gases come into contact with the heating surfaces for a longer period of time. They also help to prevent the gases from bypassing the heating surfaces and ensure that they are evenly distributed throughout the boiler.
99) 95   on a steam boiler system,   shat is the first thing a boiler operator should do when entering a boiler room? A. A blow down the boiler B. B check the water level in the boiler C. check the fire in the combustion When entering a boiler room, the first thing a boiler operator should do is check the water level in the boiler. This is important to ensure that there is enough water to maintain proper operation and prevent overheating or damage to the boiler. By checking the water level, the operator can determine if any adjustments or actions need to be taken to maintain the correct water level and ensure the safe and efficient functioning of the boiler system.
100) “96On some steam boiler system vacuum pumps are used   why
a  to increase pressure
b  it creates a vacuum on the return lines drawing back condensate to the vacuum tank
c to insure the proper operation of steam traps” A. A to increase pressure B. B it creates a vacuum on the return lines drawing back condensate to the vacuum tank C. C to insure the proper operation of steam traps Vacuum pumps are used in steam boiler systems to create a vacuum on the return lines, which helps in drawing back condensate to the vacuum tank. This is important for the efficient operation of the system as it helps in removing any air or non-condensable gases from the system, allowing the condensate to flow freely and preventing any blockages or inefficiencies.
101) 97  what is required by statute,    by the state of Minnesota,  boiler inspection division   for all boiler rooms? A. A a R stamp B. B a current inspection certificates and proper boiler engineer license C. C a boiler certificate In the state of Minnesota, the boiler inspection division requires all boiler rooms to have a current inspection certificate and a proper boiler engineer license. This ensures that the boilers are regularly inspected for safety and that they are operated by qualified professionals who have the necessary knowledge and skills to handle them effectively.
102) 98    fuel    oxygen    and heat are required to start and sustain a fire: A. True B. False “In order to start and sustain a fire, three elements are required: fuel, oxygen, and heat. Fuel provides the material that will burn, oxygen is necessary for the combustion process, and heat is needed to initiate and maintain the fire. Therefore, the statement “”98 fuel oxygen and heat are required to start and sustain a fire”” is true.”
103) “99   fuel oil strainers remove foreign matter in a fuel system   what is the purpose of duplex strainer located on the suction line before the fuel oil pump?
A   isolate the system in the event of fire
B    to strain all of the oil
C  make sure the oil is clean
D  the boiler can be run while cleaning the strainer” A. A isolate the system in the event of fire B. B to strain all of the oil C. C make sure the oil is clean D. D the boiler can be run while cleaning the strainer The purpose of the duplex strainer located on the suction line before the fuel oil pump is to ensure that the boiler can be run while the strainer is being cleaned. This means that even when the strainer is being cleaned, the fuel oil can still flow through the system and the boiler can continue to operate without interruption. This helps to maintain a continuous fuel supply and prevents any downtime or disruption in the boiler operation.
104) 100   what valve is used when steam flows in under the seat up and out the outlet A. A check valve B. B a back flow preventer C. C globe valve D. D gate valve A globe valve is used when steam flows in under the seat up and out the outlet. Globe valves have a disc or plug that moves up and down to control the flow of steam. When the valve is open, steam can flow through the seat and out the outlet. When the valve is closed, the disc or plug is pressed against the seat, preventing any backflow or leakage of steam. Therefore, a globe valve is the correct valve to use in this situation.
105) A boiler plant has three boilers with 1500 sq ft of heating surface each. What license is required to be in charge of this plant, and what license is required to be a shift engineer? A. Boiler Operator License B. Stationary Engineer License C. Steam Engineer License D. HVAC Technician License “To be in charge of a boiler plant with multiple boilers and complex systems, a Steam Engineer License is typically required, as steam engineers oversee the operation, maintenance, and safety of such systems. On the other hand, to be a shift engineer responsible for the day-to-day operation and maintenance of individual boilers within the plant, a Boiler Operator License is usually the appropriate qualification. These licenses ensure the safe and efficient functioning of the boilers in a plant. The other options, such as “”Stationary Engineer License”” and “”HVAC Technician License,”” are not the standard licenses for these specific roles in a boiler plant context.”
106) How often do you need to check a 20 horse   power high pressure boiler A. 8 hr B. 16 hrs C. 24 hrs D. 40 hrs A 20 horse power high pressure boiler needs to be checked every 24 hours. This is because high pressure boilers require regular monitoring to ensure their safe and efficient operation. Checking the boiler every 24 hours allows for timely detection of any potential issues or malfunctions, ensuring that necessary maintenance or repairs can be carried out promptly. Regular checks also help in preventing accidents or breakdowns that can result from neglected maintenance. Therefore, checking the boiler every 24 hours is crucial for its proper functioning and safety.
107) How often shoud a lwo water fuel cut off    be tested? daily The low water fuel cut off should be tested daily to ensure the safe and efficient operation of the fuel system. Regular testing helps to identify any potential issues or malfunctions with the cut off mechanism, allowing for timely repairs or adjustments. By testing daily, any problems can be addressed promptly, reducing the risk of fuel-related accidents or damage to the equipment. Additionally, regular testing helps to maintain compliance with safety regulations and standards.
108) List the different ways a low water fuel cut out can be tested quick, slow open drain, evaporation test The different ways a low water fuel cut out can be tested include a quick test, a slow open drain test, and an evaporation test. The quick test involves checking the cut out’s response time by rapidly draining the water. The slow open drain test involves gradually draining the water to see if the cut out shuts off the fuel supply at the appropriate level. The evaporation test involves monitoring the water level over a period of time to ensure that it does not decrease significantly, indicating a functioning cut out.
109) Of all the ways a low water fuel cut off    can be tested which is the best way? evaporation
110) If the gauge glass is cloudy and you cannot see the water level can you continue the boiler in operation? yes, by using the try cocks, top try cock steam Yes, you can continue the boiler in operation by using the try cocks, specifically the top try cock steam. The try cocks are small valves located on the boiler that allow the operator to manually check the water level. By opening the top try cock steam, the operator can release steam and determine the water level based on the steam pressure. This method allows for continued operation of the boiler even if the gauge glass is cloudy and the water level cannot be seen.
111) If you are operation in a steam plant what two things should be checked for first water level steam pessure In a steam plant operation, the first two things that should be checked are the water level and steam pressure. These two factors are crucial for the safe and efficient functioning of the steam plant. Monitoring the water level ensures that there is enough water to generate steam and prevent overheating or damage to the equipment. Steam pressure, on the other hand, needs to be regulated to maintain the desired temperature and pressure levels for optimal performance. Therefore, checking the water level and steam pressure is essential to ensure the smooth operation of the steam plant.
112) List the first two to check for in a hot water boiler plant. (Don’t use comma) water pressure and temperature , Water pressure water temperature , water pressure and water temperature In a hot water boiler plant, the first two things to check for are water pressure and water temperature. These are important factors to ensure the proper functioning of the boiler system. Water pressure needs to be at an appropriate level to ensure efficient water flow and prevent any damage to the system. Similarly, monitoring water temperature is crucial to maintain a safe and optimal operating condition, preventing overheating or insufficient heating of the water. By regularly checking these two parameters, any issues or abnormalities can be identified and addressed promptly, ensuring the smooth operation of the hot water boiler plant.
113) When a burner motor starts up purging begins, what does this mean? clean air When a burner motor starts up purging begins, it means that the process of removing any unburned fuel or combustion byproducts from the combustion chamber is initiated. This ensures that clean air is present in the chamber before the actual combustion process begins. Purging helps to prevent any potential hazards and ensures efficient and safe operation of the burner system.
114) On automatic fired boiler and before a pilot is lite what is required? must have 4 complete air chages Before a pilot is lit on an automatic fired boiler, it is required to have four complete air changes. This means that the boiler needs to have fresh air circulating through it four times to ensure proper combustion and safety. Sufficient air changes help to remove any potential build-up of flammable gases and maintain the optimal air-to-fuel ratio for efficient and safe operation of the boiler.
115) You are operating a 40 horsepower high pressure boiler, how often will it be checked? A. 8 hr B. 16 hr C. 24 hr D. 2 hr A high-pressure boiler is a critical piece of equipment that requires regular monitoring to ensure its safe and efficient operation. Checking the boiler every 2 hours allows for timely identification of any potential issues or abnormalities, such as pressure fluctuations, leaks, or unusual noises. This frequent monitoring helps prevent accidents, ensures proper functioning, and allows for immediate corrective actions if needed.
116) Explain in detail how ou would use the try cocks start at the bottom crack pen water work up crack it
117) When testing the low water cu out   list the steps you would take make sure the burner is on before testing The correct answer suggests that in order to test the low water cut out, it is important to ensure that the burner is turned on before conducting the test. This is because the low water cut out is a safety feature that shuts off the burner if the water level in the system drops below a certain point. Therefore, it is necessary to have the burner running in order to accurately test if the low water cut out is functioning properly.
118) Before testing a low water cut off you should do what boler needs to be on know where the manuel reset is… Before testing a low water cut off, the boiler needs to be turned on and the manual reset location should be known. This is important because the low water cut off is a safety device that shuts down the boiler if the water level drops too low, preventing damage to the boiler. By ensuring that the boiler is on and knowing the location of the manual reset, one can properly test the low water cut off to ensure it is functioning correctly and providing the necessary protection.
119) When filling out a log book    what thre word help you keep focused? when what who “When filling out a log book, the words “”when,”” “”what,”” and “”who”” help you keep focused. These words prompt you to record the specific time, activity, and individuals involved in the log book entry. By consistently using these words, you ensure that all relevant information is captured accurately and that you stay focused on the key details.”
120) What should be displayed in the boiler room A. Vacation schedule, chemicals used, and insurance papers B. Boiler operator lecense, certificat of inspeciton or exemption state inspector private ins. In the boiler room, it is necessary to display the boiler operator license, certificate of inspection or exemption, state inspector private insurance. These documents are important for ensuring that the boiler is operated safely and legally. The license indicates that the person operating the boiler has the necessary qualifications and training. The certificate of inspection or exemption shows that the boiler has been inspected and meets the required safety standards. The state inspector private insurance provides coverage in case of any accidents or damages that may occur.
121) When looking at the gauge glass on a steam boiler   what are you looking at if eveyrthing is normal A. The water level will be steady and still B. The water level will be bobbing up and down C. The water in the glass will be lower than the water in the boiler. When looking at the gauge glass on a steam boiler, if everything is normal, the water level will be bobbing up and down. This is because the water in the boiler is constantly being heated and converted into steam, causing fluctuations in the water level.
122) Which one of the answers represents the efficiency formual? A. The output divided by the input B. The input divided by the out put C. The output minus the input The efficiency formula is typically represented as the output divided by the input. This formula calculates the efficiency by comparing the output achieved to the input resources utilized. By dividing the output by the input, we can determine how effectively the input resources were converted into the desired output.
123) On a steam boiler when are two bottom blowdown valves required? A. Below 90 psi B. When pressures exceed 100 psi C. Above 120 psi D. Above 1000psi When the pressure in a steam boiler exceeds 100 psi, two bottom blowdown valves are required. Blowdown valves are used to remove impurities and sediment from the boiler, and having two valves ensures that the process is done safely and effectively. By opening both valves, the pressure can be released gradually, preventing any sudden pressure drops that could cause damage to the boiler or surrounding equipment. Therefore, when pressures exceed 100 psi, it is necessary to have two bottom blowdown valves in place.
124) What is the mazimum pressure carried on a low pressue hot water boiler A. 15 psi B. 30 psi C. 160 psi The maximum pressure carried on a low-pressure hot water boiler is 160 psi. This indicates that the boiler can handle a pressure of up to 160 pounds per square inch. It is important for the boiler to have a high maximum pressure rating to ensure that it can handle the demands and fluctuations of the hot water system without causing any damage or safety hazards. A higher maximum pressure rating provides a greater level of safety and durability for the boiler.
125) What element in fuel is needed for combustion? A. Oxygen B. Carbon C. Nitrogen Carbon is needed for combustion because it is a key component of organic matter, such as fossil fuels. During combustion, carbon reacts with oxygen to produce carbon dioxide and release energy. This process is essential for the burning of fuels and is the basis for many industrial and domestic applications, including heating, cooking, and transportation. Without carbon, combustion would not occur, and the release of energy from fuel would not be possible.
126) What is considered to be one year of experience? A. 12 months B. 2000 hours C. 2080 hours D. 4000 hours One year of experience is typically considered to be equivalent to 12 months. This is because a year consists of 12 months, and each month represents a unit of time in which a person can gain experience in a particular field or job. Therefore, when someone mentions having one year of experience, it generally means that they have accumulated knowledge and skills over the course of 12 months in a specific role or industry.
127) How much experience is required when you apply to take a 2nd class a or b exam? A. 18 mon B. 4000 hours C. 2000 hours D. 2080 hours The correct answer is 2000 hours. This suggests that when applying to take a 2nd class A or B exam, a minimum of 2000 hours of experience is required. This experience could be in a relevant field or industry, indicating that the individual must have a substantial amount of practical knowledge and skills before being eligible to take the exam.
128) How much experience is required if you are taking a chief a or b engineer exam? A. 60 mon B. 4000 hours C. 10000 hours D. 6000 hours The correct answer is 10000 hours. This indicates that in order to take a chief A or B engineer exam, a candidate must have at least 10000 hours of experience. This suggests that a significant amount of practical experience is required to qualify for this exam, indicating the importance of hands-on knowledge and expertise in the field.
129) When taking a 1st class a or b operationg engineers exam   you must have how much experience? A. 36 mon B. 42 mon C. 6000 hours D. 4160 hours To take a 1st class A or B operating engineers exam, one must have 6000 hours of experience. This indicates that a significant amount of hands-on experience is required to qualify for the exam. It is important for operating engineers to have a substantial amount of practical experience in order to demonstrate their competence and knowledge in operating and maintaining heavy machinery and equipment.
130) If you fail a boiler operator exam how long must you wait before you can tetest? A. 10 DAYS B. 30 C. 45 D. 60 After failing a boiler operator exam, you must wait for 30 days before you can retest. This waiting period allows you to review and prepare for the exam again, ensuring that you have sufficient time to study and improve your knowledge and skills before attempting the test again.
131) WHEN the state of minnesota wants to know how many btu’s   are in one boiler horse power A. 33478 btu s B. 67000 b C. 970,4 b D. 212 b The correct answer is 67000 b. This is because one boiler horsepower is equal to 33478 BTU, so to find out how many BTUs are in one boiler horsepower, you would multiply 33478 by 2, which equals 67000 BTU.
132) How many pounds of water will be in a actual boiler horsepower/ A. 34 gals B. Thirty four and one half pounds C. 54 lbs D. 8.33 gals “The correct answer is “”thirty four and one half pounds”” because it is stated that the question asks for the amount of water in pounds, and the given answer provides the specific weight of the water.”
133) How btu  s   will be required to evaporate 1 lb of water   ( latent heat) A. 212 f B. 34.5 lbs C. 970.4 btu’s D. 144 btu’s The given answer of 970.4 btu’s is the correct answer for the amount of btu’s required to evaporate 1 lb of water at 212°F. This value represents the latent heat of vaporization, which is the amount of heat energy needed to convert 1 lb of water from a liquid to a vapor at its boiling point.
134) Oxygen in the boiler water can cause corrosion    what chemical can prevent this from happening? A. Sodium sulfate B. Sodium nitrate C. Sodium sulfite Oxygen in the boiler water can cause corrosion. Sodium sulfite is a chemical that can prevent this from happening. It acts as an oxygen scavenger, reacting with the oxygen present in the water to form sodium sulfate. This reaction removes the oxygen, preventing it from causing corrosion in the boiler system. Sodium sulfate is not the correct answer as it does not have the same oxygen scavenging properties as sodium sulfite. Sodium nitrate is also not the correct answer as it does not have the same corrosion prevention properties as sodium sulfite.
135) How many btu’s are in the latent heat  ( hidden heat)  of evaporation? A. 970.4 btu s B. 180 btu s C. 212 btu s D. 32 btu s The latent heat of evaporation refers to the amount of heat energy required to convert a substance from a liquid to a gas at a constant temperature and pressure. The correct answer of 212 btu s suggests that this is the amount of heat energy required to evaporate a substance.
136) Give a definition for sensible heat can be measured with a thermometer can be felt Sensible heat refers to the heat energy that can be measured using a thermometer and can also be felt. It is the heat energy that causes a change in temperature in a substance without any phase change occurring. This means that sensible heat can be detected and quantified using a thermometer, and it can also be experienced or sensed by our body as a change in temperature.
137) Give a definition for one btu amount of heat required to raise the temp 1 lb of water 1 deg F The correct answer defines one BTU as the amount of heat required to raise the temperature of 1 pound of water by 1 degree Fahrenheit.
138) When burning oil what is meant by flash point? vapors come of the oil when exposed to a open flam, flash and burn The flash point refers to the lowest temperature at which the vapors of a substance, in this case, oil, can ignite when exposed to an open flame. When the oil is heated, it releases vapors that can catch fire and burn when they come into contact with a flame. The flash point is important because it helps determine the safety precautions needed when handling and storing flammable substances like oil.
139) What is meant by fire point fire point oil will light continue to burn The fire point refers to the temperature at which an oil or fuel will sustain combustion and continue to burn. Once the fire point is reached, the oil will ignite and the flame will persist even after the ignition source is removed. This indicates that the oil has reached a temperature at which it can support self-sustaining combustion.
140) What is viscosity resistanc to flow “The correct answer is “”resistance to flow.”” Viscosity refers to the property of a fluid that determines its resistance to flow. It measures how easily a fluid can flow and is influenced by factors such as temperature and the molecular structure of the fluid. A high viscosity means the fluid is thick and resistant to flow, while a low viscosity indicates the fluid is thin and flows easily. Therefore, resistance to flow accurately describes viscosity.”
141) What is the job of the low water fuel cut off shut down boiler in low water The low water fuel cut off is responsible for shutting down the boiler when the water level becomes too low. This is a crucial safety feature as operating a boiler with low water can lead to overheating and potential damage to the system. By shutting down the boiler, the low water fuel cut off helps prevent accidents and ensures the proper functioning of the boiler.
142) How  would you test the flame scanner put hand over the scanner The correct answer suggests that one way to test the flame scanner is by putting a hand over the scanner. This could be a valid testing method as it allows for the detection of the scanner’s ability to detect heat or flames. By placing a hand over the scanner, one can observe if it accurately detects the presence of heat or flames in a controlled environment. However, it is important to note that this explanation assumes the context of the question and the specific requirements of testing a flame scanner.
143) Give a definition for primary air determines rate of combustion how much fuel can i burn in 1 hr Primary air refers to the air that is supplied to a combustion process in order to support the initial stage of combustion. It determines the rate of combustion by providing the necessary oxygen for the fuel to burn. The more primary air that is supplied, the faster the combustion process will occur. Additionally, the amount of fuel that can be burned in one hour is also influenced by the primary air supply. Therefore, the primary air determines both the rate of combustion and the amount of fuel that can be burned in a given time period.
144) Give a definition for secondary air completees combustion process
145) What is excess air burn all fuel natural gas uses 12 % excess air “Excess air refers to the amount of air supplied to a combustion process above the stoichiometric requirement for complete combustion. In the given context, “”burn all fuel”” implies that all the fuel is combusted completely. However, natural gas, in particular, requires an additional 12% excess air to ensure efficient and complete combustion. This excess air helps to maintain a proper air-fuel ratio and prevent the formation of harmful byproducts such as carbon monoxide.”
146) Years of experience for boiler engineer license Special none Unanswered Incorrect
147) Name the different types of draft natural forced induced The different types of draft are natural, forced, and induced. Natural draft occurs when the flow of air is created by the difference in temperature between the inside and outside of a space. Forced draft, on the other hand, is when a fan or blower is used to create airflow. Induced draft, similar to forced draft, involves the use of a fan or blower, but in this case, it is used to pull air out of a space.
148) Name different types of air primary air secondary air excess air The question asks for different types of air, and the given answer provides three types: primary air, secondary air, and excess air. Primary air refers to the air that is initially supplied to a combustion process. Secondary air is the additional air introduced to enhance combustion efficiency. Excess air refers to the amount of air supplied to a combustion process beyond what is required for complete combustion. These three types of air play important roles in various combustion processes.
149) Name different types of fuel cut offs probe type float type magnetic The different types of fuel cut-offs are probe type, float type, and magnetic. These types of fuel cut-offs are used in various systems to prevent fuel flow or shut off the fuel supply in case of emergencies or maintenance. The probe type fuel cut-off uses a probe to detect the fuel level and can cut off the fuel supply when the level is too low. The float type fuel cut-off uses a float mechanism to detect the fuel level and shut off the fuel supply when the level is too high or too low. The magnetic fuel cut-off uses a magnetic field to control the fuel flow and can be activated or deactivated electronically.
150) Name the different types of boilers cast iron sectional fire tube water tube The correct answer lists three different types of boilers: cast iron sectional, fire tube, and water tube. These types refer to the design and construction of the boilers. Cast iron sectional boilers are made up of individual sections that are assembled together. Fire tube boilers have tubes running through a tank of water, with hot gases from a burner passing through the tubes to heat the water. Water tube boilers have water-filled tubes that are heated externally by hot gases, creating steam. These three types offer different advantages and are used in various applications based on their specific features and capabilities.
151) Name the 2 different types of heat latent heat sensible heat “The correct answer is “”latent heat”” and “”sensible heat””. Latent heat refers to the heat absorbed or released during a phase change, such as when a substance changes from a solid to a liquid or a liquid to a gas. Sensible heat, on the other hand, refers to the heat that can be sensed or measured, such as the heat felt when touching a hot object or the warmth in a room. These two types of heat are distinct and play important roles in understanding heat transfer and energy exchange.”
152) Heating surface is defined as A. A hot surface B. The surface used for heating C. Water on one side hot gas on the other side “The correct answer is “”water on one side hot gas on the other side.”” This definition of heating surface refers to a surface that is used to transfer heat from hot gas to water, or vice versa. It is commonly found in boilers or heat exchangers, where the hot gas and water are separated by this surface. The heat transfer occurs through conduction, allowing the water to be heated by the hot gas on the other side of the surface.”
153) Fire side boiler is what where the water surrounds the tubes In a fire side boiler, the water surrounds the tubes. This means that the tubes containing the hot gases are submerged in water, allowing for efficient heat transfer from the gases to the water. This design maximizes the contact area between the hot gases and the water, resulting in a higher heat transfer rate and increased efficiency in generating steam or hot water.
154) When tow bottom blow down valves are used on a steam boiler,   what valve is located closest to the boiler shel A. The quick opening valve B. The slow opening valve C. Modulating The modulating valve is located closest to the boiler shell when two bottom blow down valves are used on a steam boiler. This type of valve allows for precise control of the blow down process by adjusting the flow rate of water being discharged from the boiler. It provides a gradual opening and closing mechanism, allowing for better regulation of pressure and temperature in the boiler. The quick opening valve, on the other hand, provides a rapid and full opening, while the slow opening valve opens at a slower rate.
155) Who does a pressure control attached to the steam space of a boiler control the burner operation? A. Burner starts on pressure decrease stops on pressure increase B. Starts burner on pressure increase C. Stopes burner on pressure The pressure control attached to the steam space of a boiler is responsible for regulating the burner operation. It ensures that the burner starts when there is a decrease in pressure and stops when there is an increase in pressure. This control mechanism helps maintain a stable pressure level within the boiler, preventing any potential damage or safety hazards.
156) Steam bolier are low pressure  when steam boiler are not over 15 psi and liquid boiler are not over 160 psi  or 250 deg A. True B. False This statement is true because steam boilers are typically designed to operate at lower pressures, usually not exceeding 15 psi. On the other hand, liquid boilers, such as water boilers, can operate at higher pressures, but still not exceeding 160 psi or 250 degrees Fahrenheit. Therefore, the statement accurately describes the pressure limitations for steam and liquid boilers.
157) What boiler license is required for operating boiler as a shift engieer in a plant having three boiler each having 1660 sq ft of heating surface? A. Sp B. 2nd C. 1st D. Cheif “The correct answer is “”1st.”” In order to operate a boiler as a shift engineer in a plant with three boilers, each having 1660 sq ft of heating surface, a 1st class boiler license is required. This license indicates that the individual has the necessary knowledge and skills to operate and maintain boilers of this size and complexity.”
158) What boiler license is required to be in charge of a boiler plant having two boilers , each having 2500 sq ft of heating surface? A. Sp B. 2nd C. 1st D. Ch The correct answer is 1st. In order to be in charge of a boiler plant with two boilers, each having 2500 sq ft of heating surface, a person would need a 1st class boiler license. This license indicates that the individual has the knowledge and skills necessary to operate and maintain larger and more complex boiler systems.
159) What boiler license is requied for operating boiler as a shift engineer in a plant having 3 boiler with heating surfaces of 1500 sqq ft A. Ch B. 1st C. 2nd D. Sp “The correct answer is “”2nd””. This is because the question asks for the boiler license required for operating a boiler as a shift engineer in a plant with 3 boilers having a heating surface of 1500 sq ft. The 2nd option is likely the correct answer as it is the most relevant option that pertains to operating boilers in a plant setting.”
160) A boiler plant has 3 boilers 1500 sq ft of heating surface each   what lic  is required to be in    charge   of theis plant and what lic  is required to be a shift engineeer 1st and 2nd The correct answer is 1st and 2nd. In order to be in charge of a boiler plant with three boilers, each having 1500 sq ft of heating surface, a person would need to hold a 1st class boiler operator license. Similarly, to be a shift engineer in the same plant, a person would also need to hold a 2nd class boiler operator license.
161) What type of valve permitted to shut off steam gauge? A. Gate B. A tee or lever handle valve C. Globe valve A tee or lever handle valve is the type of valve that is permitted to shut off a steam gauge. This type of valve allows for easy and quick manual operation, making it suitable for shutting off the steam gauge when needed. A gate valve, on the other hand, is not typically used for shutting off steam gauges as it is better suited for regulating flow rather than completely stopping it. Similarly, a globe valve is designed for throttling flow and is not the ideal choice for shutting off a steam gauge.
162) The mazimum temp  to be carried on a low pressure hot water boiler is A. 210f B. Less then 250 f C. Less then 215 “The correct answer is “”less than 250°F.”” This means that the maximum temperature that can be carried on a low-pressure hot water boiler is lower than 250°F.”
163) Draft is the difference in pressure between tow points that cause air   gases to flow A. True B. False The statement is true. Draft refers to the difference in pressure between two points that causes air or gases to flow. This pressure difference can occur due to various factors such as temperature differences, wind, or mechanical systems. Draft is commonly used in the context of ventilation systems or chimneys, where the pressure difference helps in the movement of air or gases.
164) The valve that is installed when it is desirable to control the rate at which water flows is called a A. Stop and check valve B. Globe valve C. Safety valve D. Gate valve A globe valve is installed when it is desirable to control the rate at which water flows. This type of valve has a disc or plug that can be moved up and down to regulate the flow. By adjusting the position of the disc, the flow can be increased or decreased, allowing for precise control over the water flow rate. The globe valve is commonly used in applications where flow control is important, such as in pipelines or industrial processes.
165) How often should safet valves be tested on a low pressure boiler? A. Daily B. Annually C. Weekly D. Monthy Safety valves on low pressure boilers should be tested monthly. This is important to ensure that the valves are functioning properly and can release excess pressure when necessary. Regular testing helps to prevent any potential safety hazards and ensures the boiler operates within safe limits.
166) What is the term used when a safety valve opens open when the pressure exceed the maximum allowable working pressue  and stays open until a sufficient amount of steam is released   and when there is definite drop in pressue inside the boiler A. Hang up B. Cut out pressure C. Blow down blow back D. Over pressure “The term used when a safety valve opens when the pressure exceeds the maximum allowable working pressure and stays open until a sufficient amount of steam is released, and when there is a definite drop in pressure inside the boiler is “”blow down blow back””. This term refers to the process of releasing excess pressure and steam from the boiler to prevent any potential damage or explosion.”