NATE HEAT PUMP NEW TEST EXAM ACTUAL QUESTIONS AND ANSWERS SURE

NATE HEAT PUMP NEW TEST EXAM ACTUAL
QUESTIONS AND ANSWERS SURE A+
✔✔A heat pump is operating in the heating mode. The lower the outside air
temperature, the:

A: More efficient the heat pump becomes

B: Higher the SEER rating

C: Higher the compression ratio

D: Lower the balance point - ✔✔C: Higher the compression ratio

✔✔Which of the following can prevent the reversing valve from changing positions?

A: Low refrigerant charge

B: Overcharge of refrigerant

C: Air in the system

D: Low indoor airflow due to a dirty air filter - ✔✔A: Low refrigerant charge

, ✔✔The supply air temperature on a normally operating heat pump is:

A: Lower than that of a gas heating system

B: Higher than that of a gas heating system

C: About the same as that of a gas heating system

D: Heat pumps do not use supply air - ✔✔A: Lower than that of a gas heating system

✔✔When a heat pump is operating in the cooling mode, the suction line at the
compressor should feel _____ and when operating in the heating mode the same
suction line should feel _____.

A: Cool, hot

B: Hot, cool

C: Hot, hot

D: Cool, cool - ✔✔D: Cool, cool

✔✔High SEER rated heat pumps are those that employ:

A: Scroll compressors and over-sized coils

B: Reciprocating compressors and over-sized coils

C: Scroll compressors and accumulators

D: Reciprocating compressors and accumulators - ✔✔A: Scroll compressors and over-
sized coils

✔✔Which 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 - ✔✔A: Thermostatic expansion valve