ESCO Air Conditioning Exam Questions
and Answers Graded A+
Heat which causes a change in temperature of a substance is called - Correct
answer-Sensible heat
Heat added to a substance without a rise in temperature - Correct answer-Latent
heat
Heat added to the refrigerant in a vapor state after the evaporation process is called
- Correct answer-Superheat
Scroll compressor move refrigerant by - Correct answer-Involute Spirals
The movement of heat by way of fluid is called - Correct answer-Convection
The movement of heat by direct contact is - Correct answer-Conduction
The standard unit for measuring the quantity of heat in a substance is - Correct
answer-BTUs
Refrigerant gives up heat when - Correct answer-It condenses
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, Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - Correct answer-Prevent liquid slugging of the compressor
The state of the refrigerant in the suction line should be - Correct answer-Low
pressure / Low temperature vapor
The state of the refrigerant entering the condenser is - Correct answer-High
pressure / Highly superheated vapor
The evaporator - Correct answer-Transfers heat from the refrigerated space to the
refrigerant
Which of the following is not a thermodynamic property of refrigerants - Correct
answer-Flammability
The sequential order of steps in the vapor compressions process are - Correct
answer-Compression, Condensation, Expansion, Vaporization
If a 30 pound cylinder of reclaimed R 410 a refrigerant has been stored overnight
at 70° the pressure in the cylinder should be approximately - Correct answer-201
psig
Fan airflow pressures are usually measured in - Correct answer-Inches of water
column
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
and Answers Graded A+
Heat which causes a change in temperature of a substance is called - Correct
answer-Sensible heat
Heat added to a substance without a rise in temperature - Correct answer-Latent
heat
Heat added to the refrigerant in a vapor state after the evaporation process is called
- Correct answer-Superheat
Scroll compressor move refrigerant by - Correct answer-Involute Spirals
The movement of heat by way of fluid is called - Correct answer-Convection
The movement of heat by direct contact is - Correct answer-Conduction
The standard unit for measuring the quantity of heat in a substance is - Correct
answer-BTUs
Refrigerant gives up heat when - Correct answer-It condenses
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - Correct answer-Prevent liquid slugging of the compressor
The state of the refrigerant in the suction line should be - Correct answer-Low
pressure / Low temperature vapor
The state of the refrigerant entering the condenser is - Correct answer-High
pressure / Highly superheated vapor
The evaporator - Correct answer-Transfers heat from the refrigerated space to the
refrigerant
Which of the following is not a thermodynamic property of refrigerants - Correct
answer-Flammability
The sequential order of steps in the vapor compressions process are - Correct
answer-Compression, Condensation, Expansion, Vaporization
If a 30 pound cylinder of reclaimed R 410 a refrigerant has been stored overnight
at 70° the pressure in the cylinder should be approximately - Correct answer-201
psig
Fan airflow pressures are usually measured in - Correct answer-Inches of water
column
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
