ESCO Air Conditioning Exam UPDATED
ACTUAL Exam Questions and CORRECT
Answers
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
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
0 pounds per square inch absolute is - CORRECT ANSWER- ✔✔A pressure which cannot be
further reduced
0 pounds per square inch gauge is - CORRECT ANSWER- ✔✔The same as atmospheric
pressure
The temperature at which moisture will start to condense from the air is called - CORRECT
ANSWER- ✔✔Dew point temperature
A compound pressure gauge measures - CORRECT ANSWER- ✔✔Pressure and vacuum
Mechanical shaft seal is necessary on a - CORRECT ANSWER- ✔✔Open drive compressor
Liquid slugging is - CORRECT ANSWER- ✔✔Liquid refrigerant in the compressor
clearance space
ACTUAL Exam Questions and CORRECT
Answers
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
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
0 pounds per square inch absolute is - CORRECT ANSWER- ✔✔A pressure which cannot be
further reduced
0 pounds per square inch gauge is - CORRECT ANSWER- ✔✔The same as atmospheric
pressure
The temperature at which moisture will start to condense from the air is called - CORRECT
ANSWER- ✔✔Dew point temperature
A compound pressure gauge measures - CORRECT ANSWER- ✔✔Pressure and vacuum
Mechanical shaft seal is necessary on a - CORRECT ANSWER- ✔✔Open drive compressor
Liquid slugging is - CORRECT ANSWER- ✔✔Liquid refrigerant in the compressor
clearance space
