NATE Heat Pump Exam Questions & answers

NATE Heat Pump Exam

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 - ANS-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 - ANS-A: Heating mode

Which of the following components is exclusive to the heat pump?

A: Condenser

B: Oil separator

C: Reversing valve

D: Accumulator - ANS-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 - ANS-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 - ANS-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 - ANS-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