Question 1: What is the highest possible COP number of heat pump?
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HVAC
NEC 2023
HVAC Heat Pump Practice Test 5
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TimeHVAC Heat Pump Practice Test 5 — Question List
Question 2: Where does the defrost thermostat is located in heat pump?
- Bottom of outdoor coil
- Bottom of indoor coil
- Above the outdoor coil
- Above the indoor coil
Question 3: In which of the following heat pump cycle, the auxiliary heating element will be operated?
- Cooling cycle
- Heating cycle
- Defrost cycle
Question 4: When the frost is formed on the outdoor coil of heat pump:
- The efficiency of the heat pump decreases
- The efficiency of the heat pump increases
- It will damage the outdoor coil
- It will increase the air flow thus increases heat exchange.
Question 5: In heat pump, what is the function of outdoor coil in cooling cycle?
- Condensation
- Evaporation
- Compression
- Expansion
Question 6: In which of the following heat pump modes, the inside heat is moved to outside of the house?
- Cooling mode
- Deforest mode
- Repair mode
- Heating mode
Question 7: What is the smallest leak that an electronic leak detector is cable of sensing per year?
- 0.05 oz
- 0.5 oz
- 5 oz
- 0.005 oz
Question 8: When 170 volts is supplied to 208/230 volts compressor ………..
- It would cause current increase in the compressor
- It would increase the resistance offered by the compressor
- It would damage the compressor motor
- It would cause power increase in the compressor
Question 9: In a heat pump, which of the following mode is best to charge with refrigerant?
- Heating mode
- Cooling mode
- Deforest mode
- Repair mode
Question 10: For every unit of electricity the heat pumps are capable of producing ………… or more units of heat.
- 4 units
- 3 units
- 5 units
- 6 units
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