Exam (elaborations)
NATE HEAT PUMP EXAM QUESTIONS AND ANSWERS 2024
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NATE HEAT PUMP EXAM QUESTIONS AND ANSWERS 2024
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NATE HEAT PUMP EXAMWhich of the following metering devices can improve the operating efficiency of a
heat pump?
A: Thermostatic expansion valve
B: Automatic expansion valve
C: Fixed orifice
D: Capillary tube - ANSWERS-A: Thermostatic expansion valve
During the defrost cycle the outdoor fan motor is:
A: Shut down
B: Operated at a reduced speed
C: Stepped up to its highest speed
D: Allowed to run at its normal speed - ANSWERS-A: Shut down
Which of the following compressors is most "liquid slug" tolerable?
A: Reciprocating
B: Scroll
C: Compliant scroll
,D: Rotary - ANSWERS-B: Scroll
In the heating mode, ice can still collect on the outdoor coil even when the
outside air temperature is above 40 degrees. Why?
A: Because the outside air temperature of 40 degrees still has a dew point
temperature below the freezing point
B: Because the outdoor coil is vaporizing refrigerant at a temperature below 32
degrees
C: Because the latent heat of the refrigerant is always below freezing
D: The statement is an incorrect statement - ANSWERS-B: Because the outdoor
coil is vaporizing refrigerant at a temperature below 32 degrees
The outdoor coil on a heat pump is defrosted using:
A: Hot gas
B: Electric heaters
C: Off cycle defrost
D: Straight time defrost - ANSWERS-A: Hot gas
A customer is concerned that during the heating season heavy ice builds up on
one side of the concrete equipment pad and coil. The rest of the coil is clear of ice
and the heat pump is meeting the heating needs of the house. What is most likely
the cause of the problem?
A: High winds on that side of the outdoor unit
B: The outdoor unit is not level
, C: There is more refrigerant on that side of the coil
D: A defrost problem exists - ANSWERS-B: The outdoor unit is not level
SEER is an abbreviation for:
A: Seasonal Energy Excellence Rating
B: Seasonal Energy Efficiency Ratio
C: Summer Energy Efficiency Ratio
D: Special Efficiency Energy Rating - ANSWERS-B: Seasonal Energy Efficiency Ratio
Typical residential split system heat pumps operate on how many voltages?
A: One
B: Two
C: Three
D: Four - ANSWERS-C: Three
The United States Department of Energy has mandated that the minimum
allowable SEER rating for a new residential air conditioning system installation is:
A: 11 SEER
B: 12 SEER
C: 13 SEER
D: 14 SEER - ANSWERS-C: 13 SEER
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