ESCO Air Conditioning Exam Questions and Correct Answers/ Latest Update / Already Graded

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ESCO Air Conditioning Exam 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


Ans: Latent heat




Heat added to the refrigerant in a vapor state after the evaporation

process is called


Ans: Superheat




Scroll compressor move refrigerant by


Ans: Involute Spirals

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The movement of heat by way of fluid is called


Ans: Convection




The movement of heat by direct contact is


Ans: Conduction




The standard unit for measuring the quantity of heat in a substance is


Ans: BTUs




Refrigerant gives up heat when


Ans: It condenses




Why must refrigerant in the suction line be slightly warmer than the

saturation temperature?


Ans: Prevent liquid slugging of the compressor

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The state of the refrigerant in the suction line should be


Ans: Low pressure / Low temperature vapor




The state of the refrigerant entering the condenser is


Ans: High pressure / Highly superheated vapor




The evaporator


Ans: Transfers heat from the refrigerated space to the refrigerant




Which of the following is not a thermodynamic property of

refrigerants


Ans: Flammability




The sequential order of steps in the vapor compressions process are


Ans: Compression, Condensation, Expansion, Vaporization