NATE Heat Pump Exam questions and answers
2025\2026 A+ Grade
Charging a heat pump with refrigerant is best accomplished in the _______ mode.
A: Heating mode
B: Cooling mode
C: Defrost mode
D: Emergency heating mode
- correct answer B: Cooling mode
Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is the
heat pump more efficient?
A: Heating mode
B: Cooling mode
C: Defrost mode
D: Emergency heating mode
- correct answer A: Heating mode
Which of the following components is exclusive to the heat pump?
,A: Condenser
B: Oil separator
C: Reversing valve
D: Accumulator
- correct answer C: Reversing valve
Which of the following airflow rates is the most reasonable for a heat pump system operating in the
heating cycle?
A: 200 cfm per ton
B: 300 cfm per ton
C: 400 cfm per ton
D: 450 cfm per ton
- correct answer D: 450 cfm per ton
During the heat pump's cooling cycle, the outdoor coil is utilized as a _________ while the indoor coil is
utilized as a____________.
A: Condenser, evaporator
B: Evaporator, condenser
C: Compressor, accumulator
, D: Accumulator, condenser
- correct answer A: Condenser, evaporator
Heat is present in winter outdoor air until the outside air ambient temperature reaches a low
temperature of:
A: 0 degrees F
B: 32 degrees F
C: 273 degrees F
D: -459 degrees F
- correct answer D: -459 degrees F
Technically this is true, but not practical. A heat pump is doing good to continue to work below 10 deg F
unless specifically designed for lower temperatures.
The heat pump utilizes:
A: Two filter-driers with check valves
B: One bi-flow filter-drier
C: A single mono-flow filter-drier in the liquid line
D: Some use the bi-flow filter-drier and others use two filter-driers with check valves
- correct answer D: Some use the bi-flow- filter-drier and others use two filter-driers with check valves
The correct way to size a heat pump is to perform both heating and cooling load calculations and select
the heat pump size by:
2025\2026 A+ Grade
Charging a heat pump with refrigerant is best accomplished in the _______ mode.
A: Heating mode
B: Cooling mode
C: Defrost mode
D: Emergency heating mode
- correct answer B: Cooling mode
Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is the
heat pump more efficient?
A: Heating mode
B: Cooling mode
C: Defrost mode
D: Emergency heating mode
- correct answer A: Heating mode
Which of the following components is exclusive to the heat pump?
,A: Condenser
B: Oil separator
C: Reversing valve
D: Accumulator
- correct answer C: Reversing valve
Which of the following airflow rates is the most reasonable for a heat pump system operating in the
heating cycle?
A: 200 cfm per ton
B: 300 cfm per ton
C: 400 cfm per ton
D: 450 cfm per ton
- correct answer D: 450 cfm per ton
During the heat pump's cooling cycle, the outdoor coil is utilized as a _________ while the indoor coil is
utilized as a____________.
A: Condenser, evaporator
B: Evaporator, condenser
C: Compressor, accumulator
, D: Accumulator, condenser
- correct answer A: Condenser, evaporator
Heat is present in winter outdoor air until the outside air ambient temperature reaches a low
temperature of:
A: 0 degrees F
B: 32 degrees F
C: 273 degrees F
D: -459 degrees F
- correct answer D: -459 degrees F
Technically this is true, but not practical. A heat pump is doing good to continue to work below 10 deg F
unless specifically designed for lower temperatures.
The heat pump utilizes:
A: Two filter-driers with check valves
B: One bi-flow filter-drier
C: A single mono-flow filter-drier in the liquid line
D: Some use the bi-flow filter-drier and others use two filter-driers with check valves
- correct answer D: Some use the bi-flow- filter-drier and others use two filter-driers with check valves
The correct way to size a heat pump is to perform both heating and cooling load calculations and select
the heat pump size by:
