AIR CONDITIONING FINAL EXAM 2026-2027
QUESTIONS AND ANSWERS GRADED A+
Heat added to the refrigerant in vapor state after the evaporation process is
called....
Superheat
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature?
Prevent liquid slugging of the compressor
Heat which causes a change of temperature of substance is called....
Sensible heat
The thermostatic expansion valve has three operating pressures....
Evaporator pressure, spring pressure, and sensor bulb pressure
What is the maximum operating pressure setting for an acetylene torch?
15 psig
,Heat added to a substance without a rise in temperature; (example: liquid
refrigerant to gas) this process is called?
Latent heat of vaporization
An automatic expansion valve is best suited....
When the load remains fairly constant
If the cut-off plate is removed from a blower assembly, how would this effect
blower performance?
It would reduce air flow
When using an electronic leak detector, the sensor probe....
Should be moved approximately 1 inch every two seconds
A thermostatic expansion valve is designed to maintain...
Constant evaporator superheat
A refrigerant gives up heat when...
It condenses
, 10 lbs of refrigerant passing through a water cooled condenser will lose 20 Btu's of
heat per lb. If 10 lb of water passes through the condenser with an entering
temperature of 80 degrees F. The temperature of the water leaving the condenser
is.....
100 degrees F
Which of the following symptoms would be indicative of an oil logged condenser?
High discharge line pressure and low liquid line pressure
A compressor that has a broken valve will cause these symptoms....
High suction pressure and low discharge pressure
The state of the refrigerant in the suction line should be...
Low pressure / low temperature vapor
The heat removed from the refrigerant by the condenser is....
Both sensible and latent heat
The first function of a condenser must perform is to __________ the refrigerant
before condensing can occur.
De-superheat
QUESTIONS AND ANSWERS GRADED A+
Heat added to the refrigerant in vapor state after the evaporation process is
called....
Superheat
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature?
Prevent liquid slugging of the compressor
Heat which causes a change of temperature of substance is called....
Sensible heat
The thermostatic expansion valve has three operating pressures....
Evaporator pressure, spring pressure, and sensor bulb pressure
What is the maximum operating pressure setting for an acetylene torch?
15 psig
,Heat added to a substance without a rise in temperature; (example: liquid
refrigerant to gas) this process is called?
Latent heat of vaporization
An automatic expansion valve is best suited....
When the load remains fairly constant
If the cut-off plate is removed from a blower assembly, how would this effect
blower performance?
It would reduce air flow
When using an electronic leak detector, the sensor probe....
Should be moved approximately 1 inch every two seconds
A thermostatic expansion valve is designed to maintain...
Constant evaporator superheat
A refrigerant gives up heat when...
It condenses
, 10 lbs of refrigerant passing through a water cooled condenser will lose 20 Btu's of
heat per lb. If 10 lb of water passes through the condenser with an entering
temperature of 80 degrees F. The temperature of the water leaving the condenser
is.....
100 degrees F
Which of the following symptoms would be indicative of an oil logged condenser?
High discharge line pressure and low liquid line pressure
A compressor that has a broken valve will cause these symptoms....
High suction pressure and low discharge pressure
The state of the refrigerant in the suction line should be...
Low pressure / low temperature vapor
The heat removed from the refrigerant by the condenser is....
Both sensible and latent heat
The first function of a condenser must perform is to __________ the refrigerant
before condensing can occur.
De-superheat
