ESCO A/C 2025 EXAM questions with Correct
Verified Answers
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 of
vaporization
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
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 btu
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
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 vaoor
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
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 - ANS 201 psig
fan airflow pressures are usually measured in - ANS inches of water column
0 pounds per square inch absolute is - ANS A pressure which cannot be further reduced
0 pounds per square inch gauge is - ANS The same as atmospheric pressure
The temperature at which moisture will start to condense from the air is called - ANS
Dewpoint temperature
compound pressure gauge measures - ANS pressure and vacuum
mechanical shaft seal is necessary on a - ANS Open Drive compressor
Verified Answers
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 of
vaporization
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
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 btu
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
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 vaoor
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
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 - ANS 201 psig
fan airflow pressures are usually measured in - ANS inches of water column
0 pounds per square inch absolute is - ANS A pressure which cannot be further reduced
0 pounds per square inch gauge is - ANS The same as atmospheric pressure
The temperature at which moisture will start to condense from the air is called - ANS
Dewpoint temperature
compound pressure gauge measures - ANS pressure and vacuum
mechanical shaft seal is necessary on a - ANS Open Drive compressor
