ESCO AIR CONDITIONING EXAM PREP
SOLVED QUESTIONS ACCURATE
ANSWERS PREMIUM REVIEW
◉ Heat added to a substance without a rise in temperature
Answer: Latent heat
◉ Heat added to the refrigerant in a vapor state after the
evaporation process is called
Answer: Superheat
◉ Scroll compressor move refrigerant by
Answer: Involute Spirals
◉ The movement of heat by way of fluid is called
Answer: Convection
◉ The movement of heat by direct contact is
Answer: Conduction
◉ The standard unit for measuring the quantity of heat in a
substance is
Answer: BTUs
,◉ Refrigerant gives up heat when
Answer: It condenses
◉ Why must refrigerant in the suction line be slightly warmer
than the saturation temperature?
Answer: Prevent liquid slugging of the compressor
◉ The state of the refrigerant in the suction line should be
Answer: Low pressure / Low temperature vapor
◉ The state of the refrigerant entering the condenser is
Answer: High pressure / Highly superheated vapor
◉ The evaporator
Answer: Transfers heat from the refrigerated space to the
refrigerant
◉ Which of the following is not a thermodynamic property of
refrigerants
Answer: Flammability
◉ The sequential order of steps in the vapor compressions
process are
, 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
Answer: 201 psig
◉ Fan airflow pressures are usually measured in
Answer: Inches of water column
◉ 0 pounds per square inch absolute is
Answer: A pressure which cannot be further reduced
◉ 0 pounds per square inch gauge is
Answer: The same as atmospheric pressure
◉ The temperature at which moisture will start to condense from
the air is called
Answer: Dew point temperature
◉ A compound pressure gauge measures
Answer: Pressure and vacuum
◉ Mechanical shaft seal is necessary on a
SOLVED QUESTIONS ACCURATE
ANSWERS PREMIUM REVIEW
◉ Heat added to a substance without a rise in temperature
Answer: Latent heat
◉ Heat added to the refrigerant in a vapor state after the
evaporation process is called
Answer: Superheat
◉ Scroll compressor move refrigerant by
Answer: Involute Spirals
◉ The movement of heat by way of fluid is called
Answer: Convection
◉ The movement of heat by direct contact is
Answer: Conduction
◉ The standard unit for measuring the quantity of heat in a
substance is
Answer: BTUs
,◉ Refrigerant gives up heat when
Answer: It condenses
◉ Why must refrigerant in the suction line be slightly warmer
than the saturation temperature?
Answer: Prevent liquid slugging of the compressor
◉ The state of the refrigerant in the suction line should be
Answer: Low pressure / Low temperature vapor
◉ The state of the refrigerant entering the condenser is
Answer: High pressure / Highly superheated vapor
◉ The evaporator
Answer: Transfers heat from the refrigerated space to the
refrigerant
◉ Which of the following is not a thermodynamic property of
refrigerants
Answer: Flammability
◉ The sequential order of steps in the vapor compressions
process are
, 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
Answer: 201 psig
◉ Fan airflow pressures are usually measured in
Answer: Inches of water column
◉ 0 pounds per square inch absolute is
Answer: A pressure which cannot be further reduced
◉ 0 pounds per square inch gauge is
Answer: The same as atmospheric pressure
◉ The temperature at which moisture will start to condense from
the air is called
Answer: Dew point temperature
◉ A compound pressure gauge measures
Answer: Pressure and vacuum
◉ Mechanical shaft seal is necessary on a
