Question 1: Which of the following substance circulates through heat pump that transfers, absorbs and releases heat?
- Water
- Refrigerant
- Air
- Gas
HVAC
NEC 2023
HVAC Heat Pump Practice Test 4
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TimeHVAC Heat Pump Practice Test 4 — Question List
Question 2: Which of the following component of heat pump heat transfer takes place?
- Coil
- Compressor
- Reversing valve
- Expansion valve
Question 3: Which of the following terminal is connected if the heat pump is in cooling mode?
- O terminal
- B terminal
- R terminal
- B terminal
Question 4: In the compression refrigeration cycle, the pipe between the evaporator and compressor consists of:
- A medium temperature, high pressure liquid
- Low pressure and low temperature gas
- A high pressure , high temperature gas
- A high pressure, low temperature liquid
Question 5: Which of the following heating mechanism will have high efficiency?
- Gas furnace
- Heat pump
- Electric heating element
Question 6: Which of the following is not a heat pump class?
- Ground type
- Air to air type
- Water to air type
- Direct buried type
Question 7: If there is a voltage reading in voltmeter which is connected across thermostat terminals indicates ……………………
- The thermostat terminals open
- The thermostat terminals closed
- The thermostat is working correctly
- The thermostat is shorted
Question 8: In which of the following condition the reversing valve may not shift from heat to cool mode?
- Low refrigerant charge
- Obstructed outdoor coil
- High compressor discharge pressure
- Incorrect setting of thermostat
Question 9: Which of the following is the possible cause heat pump not operating?
- Incorrect thermostat setting
- Low refrigerant charge
- Obstructed outdoor coil
- No voltage to the coil
Question 10: What is the purpose of reversing valve in heat pump?
- Changes the direction of refrigerant
- Changes the direction of indoor and outdoor coils
- Changes the direction of condenser heat exchange
- Changes the direction of compressor motor
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