ESCO AIR CONDITIONING PRACTICE EXAM
SCRIPT 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
⩥ Heat added to a substance without a rise in temperature is called.
Answer: Latent Heat ch 4 pg 64
⩥ Heat which is added to a vapor after change of state occurs is called.
Answer: superheat ch 11 pg 224
⩥ A scroll compressor moves refrigerant by means. Answer: involute
spirals NOT SURE
⩥ The movement of heat by liquid or gas is called. Answer: convection
ch 4 pg 63
⩥ The movement of heat by direct contact is called. Answer: conduction
ch 4 pg 63
⩥ ______ is the standard unit for measuring the quantity of heat in a
substance. Answer: BTU (British Thermal Unit) ch 4 pg 60
,⩥ refrigerant gives up heat when it ________. Answer: condenses ch 6
pg 90
⩥ Why must refrigerant in the suction line be slightly warmer than the
saturation temperature?. Answer: prevent liquid slugging ch 20 pg 474
⩥ The state of the refrigerant in the suction line should be. Answer: Low
pressure/Low temperature vapor (superheated gas) ch 6 pg 95
⩥ The state of the refrigerant entering the condenser is. Answer: High-
pressure superheated vapor ch 22 pg 526
⩥ The _____ transfers heat from the refrigerated (conditioned) space to
the refrigerant.. Answer: Evaporator ch 6 pg 94
⩥ Flammability is NOT a thermodynamic property of refrigerants.
Answer: True (no ref)
⩥ The sequential order of steps in the vapor-compression process are.
Answer: Compression, Condensation, Expansion, Evaporation ch 6 pg
86
⩥ If a 30-pound cylinder of reclaimed R-410A refrigerant has been
stored overnight at 70°F, the pressure in the cylinder should be
approximately. Answer: 201 psig PT chart pg 1515 (201.8 exactly)
, ⩥ Fan airflow pressures are usually measured in. Answer: Inches of
Water Column (wc) (not in text)
⩥ a pressure which cannot be further reduced. Answer: Zero psia ch 5 pg
75
⩥ Is the same as atmospheric pressure. Answer: Zero psig ch 5 pg 75
⩥ The temperature at which moisture will start to condense from the air
is called. Answer: Dew Point temperature (100% relative humidity) ch
27 pg 664
⩥ A compound pressure gauge measures. Answer: Pressure & Vacuum
ch 10 pg 92
⩥ A mechanical shaft seal is necessary on a. Answer: open-drive
compressor ch 19 pg 419
⩥ What is Liquid refrigerant in the compressor clearance space. Answer:
Liquid slugging ch 20 pg 453
⩥ What has an effect on compressor capacity in a reciprocating
compressor. Answer: clearance space ch 19 pg 424-430
SCRIPT 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
⩥ Heat added to a substance without a rise in temperature is called.
Answer: Latent Heat ch 4 pg 64
⩥ Heat which is added to a vapor after change of state occurs is called.
Answer: superheat ch 11 pg 224
⩥ A scroll compressor moves refrigerant by means. Answer: involute
spirals NOT SURE
⩥ The movement of heat by liquid or gas is called. Answer: convection
ch 4 pg 63
⩥ The movement of heat by direct contact is called. Answer: conduction
ch 4 pg 63
⩥ ______ is the standard unit for measuring the quantity of heat in a
substance. Answer: BTU (British Thermal Unit) ch 4 pg 60
,⩥ refrigerant gives up heat when it ________. Answer: condenses ch 6
pg 90
⩥ Why must refrigerant in the suction line be slightly warmer than the
saturation temperature?. Answer: prevent liquid slugging ch 20 pg 474
⩥ The state of the refrigerant in the suction line should be. Answer: Low
pressure/Low temperature vapor (superheated gas) ch 6 pg 95
⩥ The state of the refrigerant entering the condenser is. Answer: High-
pressure superheated vapor ch 22 pg 526
⩥ The _____ transfers heat from the refrigerated (conditioned) space to
the refrigerant.. Answer: Evaporator ch 6 pg 94
⩥ Flammability is NOT a thermodynamic property of refrigerants.
Answer: True (no ref)
⩥ The sequential order of steps in the vapor-compression process are.
Answer: Compression, Condensation, Expansion, Evaporation ch 6 pg
86
⩥ If a 30-pound cylinder of reclaimed R-410A refrigerant has been
stored overnight at 70°F, the pressure in the cylinder should be
approximately. Answer: 201 psig PT chart pg 1515 (201.8 exactly)
, ⩥ Fan airflow pressures are usually measured in. Answer: Inches of
Water Column (wc) (not in text)
⩥ a pressure which cannot be further reduced. Answer: Zero psia ch 5 pg
75
⩥ Is the same as atmospheric pressure. Answer: Zero psig ch 5 pg 75
⩥ The temperature at which moisture will start to condense from the air
is called. Answer: Dew Point temperature (100% relative humidity) ch
27 pg 664
⩥ A compound pressure gauge measures. Answer: Pressure & Vacuum
ch 10 pg 92
⩥ A mechanical shaft seal is necessary on a. Answer: open-drive
compressor ch 19 pg 419
⩥ What is Liquid refrigerant in the compressor clearance space. Answer:
Liquid slugging ch 20 pg 453
⩥ What has an effect on compressor capacity in a reciprocating
compressor. Answer: clearance space ch 19 pg 424-430
