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HVAC Air Condition Esco 2022
Questions and Correct Answers/ Latest
Update / Already Graded
Heat which causes a change in temperature of a substance is
called
Ans: Sensible Heat
Heat added to a substance without a rise in temperature is called
Ans: Latent Heat
Heat added to refrigerant in a vapor state after the evaporation
process is called
Ans: Superheat
A scroll compressor moved refrigerant by means of
Ans: Involute spirals
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The movement of heat by way of fluid is called
Ans: Convection
The movement of heat through a solid object is called
Ans: Conduction
The standard unit for measuring the quantity of heat in a substance
Ans: British Thermal Unit
A refrigerant gives up heat when it
Ans: Condenses
Why must refrigerant in the suction line be slightly warmer than the
saturation temperature?
Ans: Prevent liquid slugging of compressor
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It is desirable for refrigerant in the suction line to be slightly
superheated in order to
Ans: Insure liquid refrigerant does not enter the compressor
A mechanical shaft seal is necessary on
Ans: Semi-hermetic compressor
Liquid slugging is
Ans: Liquid refrigerant in the compressor clearance space
The clearance space in a reciprocating compressor
Ans: Varies depending on compressor speed
Which of the following types of air conditioning compressors is most
energy efficient
Ans: Centrifugal
HVAC Air Condition Esco 2022
Questions and Correct Answers/ Latest
Update / Already Graded
Heat which causes a change in temperature of a substance is
called
Ans: Sensible Heat
Heat added to a substance without a rise in temperature is called
Ans: Latent Heat
Heat added to refrigerant in a vapor state after the evaporation
process is called
Ans: Superheat
A scroll compressor moved refrigerant by means of
Ans: Involute spirals
,2 | Page
The movement of heat by way of fluid is called
Ans: Convection
The movement of heat through a solid object is called
Ans: Conduction
The standard unit for measuring the quantity of heat in a substance
Ans: British Thermal Unit
A refrigerant gives up heat when it
Ans: Condenses
Why must refrigerant in the suction line be slightly warmer than the
saturation temperature?
Ans: Prevent liquid slugging of compressor
, 3 | Page
It is desirable for refrigerant in the suction line to be slightly
superheated in order to
Ans: Insure liquid refrigerant does not enter the compressor
A mechanical shaft seal is necessary on
Ans: Semi-hermetic compressor
Liquid slugging is
Ans: Liquid refrigerant in the compressor clearance space
The clearance space in a reciprocating compressor
Ans: Varies depending on compressor speed
Which of the following types of air conditioning compressors is most
energy efficient
Ans: Centrifugal
