The Heatpump

What is the primary function of the reversing valve in an air source heat pump?

• To compress the refrigerant

• To allow both heating and cooling modes

• To expand the refrigerant

• To exchange heat with the outdoor air

Which component is described as the driving force of the refrigerant around the system?

• Expansion valve

• Heat exchanger

• Compressor

• Reversing valve

What is the role of the outdoor unit's fan in a heat pump system?

• To compress the refrigerant

• To help speed up the heat exchange process

• To distribute treated air around the building

• To cool down the compressor

In cooling mode, what does the indoor unit act as?

• Condenser

• Evaporator

• Expansion valve

• Compressor

What happens to the refrigerant when it passes through the expansion valve?

• It becomes a high pressure, high temperature vapor

• It is heated to a high temperature

• It becomes a low pressure, low temperature liquid vapor mixture

• It is compressed into a liquid

What condition allows a heat pump to extract thermal energy from the air?

• The refrigerant is at a low temperature

• The air temperature is above the boiling point of the refrigerant

• The air temperature is below the boiling point of the refrigerant

• The refrigerant is at a high pressure

What is the boiling point of refrigerant R134a?

• 100 degrees Celsius

• -15 degrees Fahrenheit

• -26 degrees Celsius

• -48 degrees Celsius

How does the temperature of the air affect the efficiency of a heat pump?

• Efficiency only depends on the type of refrigerant used

• The warmer the air, the more efficient the heat pump

• The efficiency is not affected by air temperature

• The colder the air, the more efficient the heat pump

What is the state of the refrigerant as it leaves the evaporator in cooling mode?

• Low pressure, high temperature liquid

• High pressure, high temperature vapor

• Low pressure, low temperature saturated vapor

• High pressure, medium temperature liquid

In heating mode, what does the outdoor unit act as?

• Expansion valve

• Compressor

• Evaporator

• Condenser