FREE AND STUDY GAMES ABOUT HVAC EXAM QUESTIONS

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FREE AND STUDY GAMES ABOUT HVAC EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -44 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Vacuum pump

Answer:

pump used to remove air and moisture from a refrigeration system at a pressure below atmospheric pressure

Question 2: boiler

Answer:

tank where heat produced from the combustion of fuels such as natural gas, fuel oil, or coal is used to generate hot water or steam.

Question 3: water cooled system

Answer:

air conditioning system that uses freon as a refrigerant and water as a condensing medium

Question 4: Het

Answer:

High Efficiency take off

Question 5: Outdoor coil/condensing unit

Answer:

portion of a heat pump or air conditioning system that is outside the home functions as a heat transfer collecting heat from a dispelling heat to outside air

Question 6: Freon

Answer:

Hydrogenated simple hydrocarbon containing fluorine, chlorine or bromine used as refrigerants

Question 7: Condenser

Answer:

Transfers unwanted heat out of a refrigeration system to a medium. There are three types of condensers air cooled water cooled and evaporative

Question 8: Centrifugal Compressor

Answer:

Compressor used in vapor compression refrigeration cycles where a rotating impeller is the device which compresses the refrigerant vapor.

Question 9: Cop(coefficient of performance)

Answer:

Measure of the energy efficiency of a chiller

Question 10: RMVD

Answer:

Round Motorized volume damper

Question 11: LCD

Answer:

Liquid crystal display

Question 12: Roof curb

Answer:

Raised frame used to mount mechanical units (such as air conditioning or exhaust fans), skylights, etc.on a roof

Question 13: Indoor unit

Answer:

located in the house containing coil, fan, motor and filtering device

Question 14: Roof Cap

Answer:

Located on the outside of the bin, directly in the center of the roof (i.e. right at the top of the bin). The roof cap can be opened to allow for increased airflow, especially when unloading the bin.

Question 15: Dehumidification

Answer:

reduction of water vapor in air by cooling the air below the dew point.

Question 16: Integrally controlled motor (ICM)

Answer:

Variable speed motor that operates at low rpm for efficiency and quiet operation, 90% efficient versus 60% efficiency for conventional motors

Question 17: Indoor Coil

Answer:

Refrigerant portion of fan coil unit typically made of several rows of copper tubing with aluminum fins

Question 18: upflow

Answer:

air conditioning system that discharges air into the conditioned space on top mounted discharge plenum or overhead duct

Question 19: Purge device

Answer:

device that removes air and water vapor from the refrigerant inside a chiller. Purge is necessity in negative pressure designs,

Question 20: upflow furnace

Answer:

furnace that pulls return air in from the bottom and expels warm air from the top

Question 21: OBD

Answer:

Opposed blade damper

Question 22: Precision AC

Answer:

systems that primarily desiigned for cooling electronic not people.

Question 23: Condensing unit

Answer:

Mechanism that pumps vaporized refrigerant from evaporator, compresses it,liquefies it in the condenser and returns it to the refrigerant control.

Question 24: Blower

Answer:

Air handling device for moving air in a distribution system

Question 25: Condenser coil

Answer:

tubes filled with refrigerant, normally located outside the home,that removes heat from the hot, gaseous refrigerant so that the refrigerant becomes liquid again.

Question 26: Heat exchanger

Answer:

Device for the transfer of heat energy from the source to the conveying meduim

Question 27: Downflow

Answer:

Air conditioning system that discharges air downward, directly beneath a raised floor, found in computer rooms or modern office spaces

Question 28: Refrigerant

Answer:

Substance that produces a refrigerating effect while expanding or vaporizing