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NATE Exam Air Conditioning and Heat Pumps Questions and Complete Solutions Graded A+ $13.49   Add to cart

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NATE Exam Air Conditioning and Heat Pumps Questions and Complete Solutions Graded A+

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a. Air movement b. Humidity c. Temperature d. All of the above - Answer: d (All of the above: air movement, humidity, temperature) A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible capacity of a cooling-only system should be within ____% of this...

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  • August 14, 2024
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NATE Exam Air
Conditioning and Heat
Pumps Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]

,Which of the following factors affects a customer's level of comfort?



a. Air movement

b. Humidity

c. Temperature

d. All of the above - Answer: d (All of the above: air movement, humidity, temperature)



A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible
capacity of a cooling-only system should be within ____% of this calculated value.



a. ±10%

b. +10%

c. +15%

d. +30% - Answer: c (+15%)



The maximum sensible cooling capacity of a heat pump should be within ____% of the calculated
sensible heat gain of a structure with a large heating load.



a. ±10%

b. +15%

c. -25%

d. +25% - Answer: d (+25%)



The combined output of a heat pump and its auxiliary heat should not exceed the calculated heat loss of
a home by more than ____%.



a. 10%

b. 15%

c. 20%

d. 25% - Answer: b (15%)

, What amount of auxiliary electric heat is needed when the output of a heat pump on a design day
equals 18,800 Btuh and the heat loss of a home is 29,700 Btuh?



a. 2.1 kWh

b. 3.2 kWh

c. 5.0 kWh

d. 10.9 kWh



Note: 3,413 Btu/kW - Answer: b (3.2 kWh)



The three processes that transfer heat energy are conduction, convection, and ____.



a. concentration

b. radiation

c. refraction

d. static pressure - Answer: b (radiation)



Heat transfer that occurs when substances of different temperatures are in contact with each other is
called ____.



a. concentration

b. conduction

c. convection

d. radiation - Answer: b (conduction)



What effect does raising the pressure in a sealed system have on refrigerant?



a. It becomes more difficult to subcool the liquid refrigerant

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