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Hvac Midterm Exam Questions And Answers 2024/2025UPDATE
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Hvac Midterm Exam Questions And Answers 2024/2025UPDATE
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Hvac Midterm Exam Questions AndAnswers 2024/2025UPDATE
One watt (1 W) of electrical energy is equivalent to ________ Btu's of heat energy. ANS✔✔ 3.413 Btus
Latent heat is also know as.
A. Heat quantity
B. Heat Intensity
C. Hidden Heat
D. Specific Heat ANS✔✔ C. Hidden Heat
What is superheat?
A. A vapor with a temperature above its saturation temperature.
B. The temperature of refrigerant leaving the evaporator
C. The temperature of refrigerant entering the compressor.
D. None of the above ANS✔✔ A. A vapor with a temperature above its saturation temperature.
The indoor coil of a heat pump system serves as the _____ during the cooling season, and as the _____
during the heating season. ANS✔✔ evaporator, condenser
, In which component of a refrigeration system is heat removed? ANS✔✔ The Condenser
What is the most common type of heat pump used in residential applications? ANS✔✔ Air-to-air split
system
What indoor air volume (expressed in cfm) would be required for a heating unit that has a 50°F
temperature rise and an output of 80,000 Btuh?
* See formula page ANS✔✔ 1481 cfm
How much auxiliary heat will be required on a design day when a home's heat loss is 35,600 Btuh and
the heat pump output is 17,200 Btuh?
* See formula page ANS✔✔ 5.39 kW or 5,390 watts
Why does the indoor coil of a heat pump need more area than the indoor coil of a cooling-only unit?
ANS✔✔ To prevent the condensing temperatures and corresponding head pressures from becoming
too high during the heating cycle.
Why does a heat pump require three-function control? ANS✔✔ Because a heat pump performs three
functions-it provides cooling, it provides heating, and it must defrost the outdoor coil when ice forms on
it.
What is the coefficient of performance (COP) of a heat pump? ANS✔✔ A comparison of how much heat
the heat pump is producing compared to how much heat an electric furnace would produce using the
same amount of electricity.
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