ESCO AIR CONDITIONING
COMPREHENSIVE QUESTIONS AND
SOLUTIONS
◉ What is heat added to a substance without a rise in
temperature called?
Answer: Latent heat
◉ What is heat added to the refrigerant in a vapor state after the
evaporation process called?
Answer: Superheat
◉ How does a scroll compressor move refrigerant?
Answer: Involute Spirals
◉ What is the movement of heat by way of fluid called?
Answer: Convection
◉ What is the movement of heat by direct contact called?
Answer: Conduction
◉ What is the standard unit for measuring the quantity of heat in
a substance?
, Answer: BTUs
◉ When does refrigerant give up heat?
Answer: When it condenses
◉ Why must refrigerant in the suction line be slightly warmer
than the saturation temperature?
Answer: To prevent liquid slugging of the compressor
◉ What should be the state of the refrigerant in the suction line?
Answer: Low pressure / Low temperature vapor
◉ What is the state of the refrigerant entering the condenser?
Answer: High pressure / Highly superheated vapor
◉ What does the evaporator do?
Answer: Transfers heat from the refrigerated space to the
refrigerant
◉ Which of the following is not a thermodynamic property of
refrigerants?
Answer: Flammability
COMPREHENSIVE QUESTIONS AND
SOLUTIONS
◉ What is heat added to a substance without a rise in
temperature called?
Answer: Latent heat
◉ What is heat added to the refrigerant in a vapor state after the
evaporation process called?
Answer: Superheat
◉ How does a scroll compressor move refrigerant?
Answer: Involute Spirals
◉ What is the movement of heat by way of fluid called?
Answer: Convection
◉ What is the movement of heat by direct contact called?
Answer: Conduction
◉ What is the standard unit for measuring the quantity of heat in
a substance?
, Answer: BTUs
◉ When does refrigerant give up heat?
Answer: When it condenses
◉ Why must refrigerant in the suction line be slightly warmer
than the saturation temperature?
Answer: To prevent liquid slugging of the compressor
◉ What should be the state of the refrigerant in the suction line?
Answer: Low pressure / Low temperature vapor
◉ What is the state of the refrigerant entering the condenser?
Answer: High pressure / Highly superheated vapor
◉ What does the evaporator do?
Answer: Transfers heat from the refrigerated space to the
refrigerant
◉ Which of the following is not a thermodynamic property of
refrigerants?
Answer: Flammability
