ESCO AIR CONDITIONING FINAL REVIEW
QUESTIONS VERIFIED COMPLETE
ANSWERS 100 PERCENT CORRECT
◉ Bubbles in a sight glass would be an indication of
Answer: TXV with an excessive superheat setting
◉ The oil separator is installed in the
Answer: Discharge Line
◉ Which of the following is true of a solenoid valve in a pump
down system
Answer: Its located before the metering device
◉ The purpose of an evaporator pressure regulating valve is to
Answer: prevent evaporator pressure from falling below a set
limit
◉ A liquid to suction heat exchanger is often used to
Answer: increse liquid subcooling
◉ The oil pressure safety switch is operated by _________.
, Answer: the difference between crankcase pressure and oil pump
pressure
◉ A low pressure cut off switch is used to
Answer: establish a minimum operating pressure in the
evaporator
◉ A partially iced over evaporator can be caused by
Answer: an undercharge
◉ _________ can be use for a leak detection with all high-pressure
refrigerant
Answer: Soap bubbles
◉ The flow rate of a TXV is used in R 410A systems as compared
to R22 systems is
Answer: Approximately 15% greater
◉ When using an electronica leak detector the sensor probe
Answer: should be moved at approximately 1 inch for every two
seconds
◉ Moisture in a refrigeration system will cause
Answer: Compressor failure
QUESTIONS VERIFIED COMPLETE
ANSWERS 100 PERCENT CORRECT
◉ Bubbles in a sight glass would be an indication of
Answer: TXV with an excessive superheat setting
◉ The oil separator is installed in the
Answer: Discharge Line
◉ Which of the following is true of a solenoid valve in a pump
down system
Answer: Its located before the metering device
◉ The purpose of an evaporator pressure regulating valve is to
Answer: prevent evaporator pressure from falling below a set
limit
◉ A liquid to suction heat exchanger is often used to
Answer: increse liquid subcooling
◉ The oil pressure safety switch is operated by _________.
, Answer: the difference between crankcase pressure and oil pump
pressure
◉ A low pressure cut off switch is used to
Answer: establish a minimum operating pressure in the
evaporator
◉ A partially iced over evaporator can be caused by
Answer: an undercharge
◉ _________ can be use for a leak detection with all high-pressure
refrigerant
Answer: Soap bubbles
◉ The flow rate of a TXV is used in R 410A systems as compared
to R22 systems is
Answer: Approximately 15% greater
◉ When using an electronica leak detector the sensor probe
Answer: should be moved at approximately 1 inch for every two
seconds
◉ Moisture in a refrigeration system will cause
Answer: Compressor failure
