Refrigeration Exam Rated A+
The rate at which a refrigeration system will remove heat from the refrigerated medium
is defined as:
Coefficient of Performance
Net cooling coefficient
Refrigeration capacity
Compression Ratio
Differential efficiency - Answer- Refrigeration capacity
Which of the following correctly describes the heat transfer that takes place in a simple
ice-box?
There is a net loss of heat from the system, as the air cools.
Air gives up sensible heat; ice does not gain any heat.
Air gives up sensible heat; ice gains sensible heat.
Air gives up sensible heat; ice gains latent heat of fusion.
Air gives up latent heat; ice gains latent heat of condensation. - Answer- Air gives up
sensible heat; ice gains latent heat of fusion.
(4-113-1.04) The saturation temperature of a refrigerant is the same as its:
Boiling point
Freezing point
Flash point
Fire point
Auto ignition temperature - Answer- Boiling point
If the first column of a refrigeration table lists the saturation temperature of a refrigerant,
which column will most likely list the saturation pressure?
Column 1
,Column 2
Column 3
Column 4
Column 5 - Answer- Column 2
(4-113-1.08) Refrigerants will evaporate when the:
Pressure is increased.
Temperature is increased to saturation temperature.
They are diluted.
Temperature is reduced below saturation temperature.
Heat is removed from them. - Answer- Temperature is increased to saturation
temperature.
The net refrigerating effect of a refrigerant is the amount of heat:
Discharged by the condenser.
Absorbed by the refrigerant in the evaporator.
Absorbed by the refrigerant in the condenser.
Discharged by the refrigerant in the evaporator.
Absorbed by the evaporator. - Answer- Absorbed by the refrigerant in the evaporator.
(4-113-1.02) Heat that causes an increase in temperature, is called _____ heat:
Conductive
Radiant
Sensible
Latent
Convective - Answer- Sensible
, Which of the following is an example of a loss of latent heat?
Steam condenses
Water evaporates
Ice melts
Refrigerant evaporates
Air is cooled - Answer- Steam condenses
In a refrigeration system, the liquid refrigerant is changed to a gas in the:
Condenser
Charging drum
Receiver
Compressor
Evaporator - Answer- Evaporator
(4-113-2.01) The function of the condenser in a refrigeration system is to:
Lower the temperature of the liquid refrigerant.
Change high pressure refrigerant vapour to liquid.
Pressurize low pressure refrigerant vapour.
Vent off vaporized refrigerant.
Lower the liquid refrigerant pressure. - Answer- Change high pressure refrigerant
vapour to liquid.
In a closed vessel, the boiling point of a liquid can be raised by:
Raising the liquid level in the vessel.
Lowering the pressure in the vessel.
Raising the pressure in the vessel.
Lowering the liquid level in the vessel.
The rate at which a refrigeration system will remove heat from the refrigerated medium
is defined as:
Coefficient of Performance
Net cooling coefficient
Refrigeration capacity
Compression Ratio
Differential efficiency - Answer- Refrigeration capacity
Which of the following correctly describes the heat transfer that takes place in a simple
ice-box?
There is a net loss of heat from the system, as the air cools.
Air gives up sensible heat; ice does not gain any heat.
Air gives up sensible heat; ice gains sensible heat.
Air gives up sensible heat; ice gains latent heat of fusion.
Air gives up latent heat; ice gains latent heat of condensation. - Answer- Air gives up
sensible heat; ice gains latent heat of fusion.
(4-113-1.04) The saturation temperature of a refrigerant is the same as its:
Boiling point
Freezing point
Flash point
Fire point
Auto ignition temperature - Answer- Boiling point
If the first column of a refrigeration table lists the saturation temperature of a refrigerant,
which column will most likely list the saturation pressure?
Column 1
,Column 2
Column 3
Column 4
Column 5 - Answer- Column 2
(4-113-1.08) Refrigerants will evaporate when the:
Pressure is increased.
Temperature is increased to saturation temperature.
They are diluted.
Temperature is reduced below saturation temperature.
Heat is removed from them. - Answer- Temperature is increased to saturation
temperature.
The net refrigerating effect of a refrigerant is the amount of heat:
Discharged by the condenser.
Absorbed by the refrigerant in the evaporator.
Absorbed by the refrigerant in the condenser.
Discharged by the refrigerant in the evaporator.
Absorbed by the evaporator. - Answer- Absorbed by the refrigerant in the evaporator.
(4-113-1.02) Heat that causes an increase in temperature, is called _____ heat:
Conductive
Radiant
Sensible
Latent
Convective - Answer- Sensible
, Which of the following is an example of a loss of latent heat?
Steam condenses
Water evaporates
Ice melts
Refrigerant evaporates
Air is cooled - Answer- Steam condenses
In a refrigeration system, the liquid refrigerant is changed to a gas in the:
Condenser
Charging drum
Receiver
Compressor
Evaporator - Answer- Evaporator
(4-113-2.01) The function of the condenser in a refrigeration system is to:
Lower the temperature of the liquid refrigerant.
Change high pressure refrigerant vapour to liquid.
Pressurize low pressure refrigerant vapour.
Vent off vaporized refrigerant.
Lower the liquid refrigerant pressure. - Answer- Change high pressure refrigerant
vapour to liquid.
In a closed vessel, the boiling point of a liquid can be raised by:
Raising the liquid level in the vessel.
Lowering the pressure in the vessel.
Raising the pressure in the vessel.
Lowering the liquid level in the vessel.
