DC BOILER EXAM COMPLETE 240 QUESTIONS AND CORRECT DETAILED ANSWERS

DC BOILER EXAM COMPLETE 240 QUESTIONS AND CORRECT DETAILED ANSWERS ( ANSWERS)

1 P a g e DC BOILER EXAM 2026-2027 COMPLETE 240 QUESTIONS AND CORRECT DETAILED ANSWERS ( ANSWERS) The setting or adjusting of a safety valve should only be done by a ___. - ANSWER- qualified person who is familiar with the construction and operation of the safety valve The ___ is the operating pressure of a boiler as determined by the design and construction of the boiler in conformance with the ASME Code. - ANSWER- maximum allowable working pressure The safety valve on a boiler must be capable of discharging all the steam the boiler can generate without the pressure increasing more than ___ above the MAWP. - ANSWER- 6% A(n) ___ test is a safety valve test performed to determine if a safety valve opens at the correct pressure. - ANSWER- pop 2 P a g e A fitting is a ___ and is required for the operation of the boiler. - ANSWER- component directly attached to a boiler Steam boilers having more than ___ sq ft of heating surface require two or more safety valves. - ANSWER- 500 ___ is the predetermined pressure at which a safety valve opens and remains open until the pressure drops. - ANSWER- Popping pressure Electric boilers exceeding ___ kW of input require two safety valves. - ANSWER- 500 Drains are placed at the lower section of safety valve discharge piping to ___. - ANSWER- remove any condensation that may form A(n) ___ test is used to establish the relief capacity of boiler safety valves. - ANSWER- accumulation The ___ is the part on a safety valve that increases the area of the safety valve disc to increase the total force. - ANSWERhuddling chamber 3 P a g e Safety valve ___ is a drop in pressure between popping pressure and reseating pressure as a safety valve relieves boiler overpressure. - ANSWER- blowdown Boiler safety valves are placed ___ of the boiler. - ANSWER- at the highest part of the steam space The safety valve ___ is the amount of steam that can be relieved by a safety valve. - ANSWER- capacity The boiler vent is located at the ___. - ANSWER- highest part of the steam side of the boiler Cyclone separators are used to ___. - ANSWER- separate water droplets from steam The ASME code will allow an automatic nonreturn valve to be used in place of one of the main steam stop valves. If a nonreturn valve is used, it must be ___. - ANSWER- located between the main steam stop valve and boiler shell When cutting a boiler equipped with hand-ope main steam stop valves in on-line, the steam pressure on the incoming boiler ___. - ANSWER- should be slightly lower than line pressure 4 P a g e A ___ valve should be used as the main steam stop valve. - ANSWER- gate A steam separator is used to improve the quality of steam in order to ___. - ANSWER- prevent damage from water hammer Hydrostatic pressure is caused by ___. - ANSWER- the weight of a column of water A(n) ___ is located at the lowest part of the water side of a firetube boiler or the mud drum of a watertube boiler so that sludge and sediment can be removed from the bottom of the boiler. - ANSWER- bottom blowdown valve A steam pressure gauge must be protected by a(n) ___ to prevent steam from damaging the gauge. - ANSWER- steam siphon Satu steam is steam that is ___. - ANSWER- in equilibrium with water at the same temperature and pressure