Question 1: How many times the heat pumps are more efficient than electric resistance heaters in their user of electricity?
- Two
- Three
- Four
- Five
HVAC
NEC 2023
HVAC Heat Pump Practice Test 1
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TimeHVAC Heat Pump Practice Test 1 — Question List
Question 2: The dirty and clogged air filter in a heat pump can cause:
- Inadequate heating
- Reduces the refrigerant pressure
- Increases the refrigerant leak in the system
- Increases the refrigerant pressure
Question 3: In a heat pump, which of the following mode is best to charge with refrigerant?
- Heating mode
- Cooling mode
- Deforest mode
- Repair mode
Question 4: 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
Question 5: In heat pump, what is the function of indoor coil in cooling cycle?
- Condensation
- Evaporation
- Compression
- Expansion
Question 6: 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 7: Which of the following action will be performed in defrost cycle of heat pump?
- The frost on outdoor coil is removed by a component in heat pump
- The heat pump cycle will be reversed at specific intervals to temporally heat the outdoor coil.
- The heat pump will be stopped until the frost on outdoor coil is removed
Question 8: In heat pump defrost cycle, up to what temperature of outdoor coil the heat pump will remain cooling cycle?
- 67<sup> 0 </sup> C
- 57<sup> 0 </sup> C
- 87<sup> 0 </sup> C
- 97<sup> 0 </sup> C
Question 9: 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 10: At sea level if a gauge reads a pressure of 35 psig, what is its equivalent absolute pressure?
- 49.7 psia
- 26 psia
- 56.3 psia
- 45 psia
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