ESCO AIR CONDITIONING EXAM MOCK TEST
WITH ANSWER RATIONALES 2026
◉ 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
◉ In order to remove as much moisture as possible from a system.
, Answer: triple evacuate the system to 500 microns with a deep
vacuum pump
◉ what type of gauge is used to measure microns.
Answer: an electronic vacuum gauge
◉ Water will vaporize at ________ temperature in a 28 in hg vacuum.
Answer: 10°F
◉ After a system has been opened and the compressor changed the
service technician must.
Answer: Replace the filter dryer, leak check, evacuate, and charge
◉ Back seating a two-way service valve results in.
Answer: Open service port with normal system flow
◉ The R-410 a compound gauge reads 124 psig in the suction line
temperature at the condensing unit is 54°F. What is the operating
system superheat.
Answer: 12°F
◉ When topping off an operating system containing a blended
refrigerant.
WITH ANSWER RATIONALES 2026
◉ 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
◉ In order to remove as much moisture as possible from a system.
, Answer: triple evacuate the system to 500 microns with a deep
vacuum pump
◉ what type of gauge is used to measure microns.
Answer: an electronic vacuum gauge
◉ Water will vaporize at ________ temperature in a 28 in hg vacuum.
Answer: 10°F
◉ After a system has been opened and the compressor changed the
service technician must.
Answer: Replace the filter dryer, leak check, evacuate, and charge
◉ Back seating a two-way service valve results in.
Answer: Open service port with normal system flow
◉ The R-410 a compound gauge reads 124 psig in the suction line
temperature at the condensing unit is 54°F. What is the operating
system superheat.
Answer: 12°F
◉ When topping off an operating system containing a blended
refrigerant.
