Unit 12 - HVAC

Front

Which component of the refrigeration system cools the space by absorbing heat from its surroundings?

Back

Evaporator

Front

Which of the following pressure and temperature changes occur as refrigerant passes through the expansion device? Options: Both pressure and temperature increase, Pressure increases and temperature decreases, Pressure decreases and temperature increases, Both pressure and temperature decrease

Back

Both pressure and temperature decrease

Front

Which of the following best describes the refrigerant as it moves through the metering device? It enters the device as a superheated gas and leaves the device as a mixture of liquid and vapor, It enters the device as a saturated mixture and leaves the device as a superheated gas, It enters the device as a saturated mixture and leaves the device as a subcooled liquid, It enters the device as a subcooled liquid and leaves the device as a mixture of liquid and vapor

Back

It enters the device as a subcooled liquid and leaves the device as a mixture of liquid and vapor

Front

At what point in the refrigeration cycle does the refrigerant change from a superheated vapor to a saturated mixture? Options: Leaving the evaporator, Center of the condenser, End of the condenser, Center of the evaporator

Back

Center of the condenser

Front

Which of the following best describes the pressure, temperature, and state of the refrigerant as it enters the condenser? Pressure and temperature are low and it is a vapor, Pressure and temperature are high and it is a vapor, Pressure and temperature are high and it is a saturated mix, Pressure and temperature are low and it is a saturated mix

Back

Pressure and temperature are high and it is a vapor

Front

Which of the following best describes the change in refrigerant from when it enters the evaporator to when it exits the evaporator? It enters as a subcooled liquid and exits as a saturated mixture, It enters as a superheated vapor and exits as a saturated mixture, It enters as a saturated mixture and exits as a subcooled liquid, It enters as a saturated mixture and exits as a superheated vapor

Back

It enters as a saturated mixture and exits as a superheated vapor

Front

Which two components of a refrigeration system are connected by the discharge line? Options: Metering device and evaporator, Compressor and condenser, Evaporator and compressor, Condenser and metering device

Back

Compressor and condenser

Front

Which component of the refrigeration unit is attached to the discharge line and the suction line?

Back

Compressor

Front

What happens to vapor that is collected in a liquid receiver?

Back

It is allowed to flow back into the condenser.

Front

Where does liquid refrigerant that has been stored in a liquid receiver enter the refrigeration system when it is needed?

Back

The liquid line