©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
Refrigeration ESCO Exam Questions and
Answers 100% Pass
_____ can be used for a leak detection with all high pressure refrigerant - Answer✔soap
bubbles
10 pounds of refrigerant passing through a water cooled condenser will lose 20 BTUs of heat
per pound. If 10 pounds of water passes through the condenser with an entering temperature
of 80°F the temperature of the water leaving the condenser is - Answer✔100 degrees
a compound pressure gauge measures - Answer✔pressure and vacuum
a compressor that has a broken reed valve will cause these symptoms - Answer✔high suction
pressure and low discharge pressure
a customer complains that their air conditioning system is running constantly, but not cooling
enough. the suction line is very cold and the compressor is sweating, the most likely cause is -
Answer✔a restriction of the return air or a dirty evaporator
a customer reports that their residential split system had a compressor replaced last week by
another service company. Now the unit is not cooling properly. when you arrive and inspect the
unit, you find that the evaporator seems to be starved for refrigerant. on examining the
condensing unit you find that the liquid line is sweating where it leaves the drier. This is most
likely the result of - Answer✔debris from the burned out compressor has clogged the drier
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
a decrease in superheat causes the thermostatic expansion valve to begin to - Answer✔close
A dirty evaporator in an air conditioning system will cause these symptoms - Answer✔low
suction pressure and low discharge pressure
a faulty condenser fan motor on an air conditioning system will cause these symptoms -
Answer✔high suction pressure and high discharge pressure
a liquid receiver is used to - Answer✔store liquid refrigerant
a liquid to suction heat exchanger is often used to - Answer✔increase liquid subcooling
a low pressure cut off switch is used to - Answer✔establish minimum operating pressure in the
evaporator
a low refrigerant charge in an air conditioning system will causes these symptoms -
Answer✔low suction pressure and low discharge pressure
a mechanical shaft seal is necessary on a - Answer✔open drive compressor
a partially clogged capillary tube can cause - Answer✔a starved evaporator
a partially iced over evaporator can be caused by - Answer✔an undercharge
a refrigerant gives up heat when - Answer✔it condenses
A refrigerant overcharge in a capillary tube air conditioning system will cause these symptoms -
Answer✔high suction pressure and high discharge pressure
2
Refrigeration ESCO Exam Questions and
Answers 100% Pass
_____ can be used for a leak detection with all high pressure refrigerant - Answer✔soap
bubbles
10 pounds of refrigerant passing through a water cooled condenser will lose 20 BTUs of heat
per pound. If 10 pounds of water passes through the condenser with an entering temperature
of 80°F the temperature of the water leaving the condenser is - Answer✔100 degrees
a compound pressure gauge measures - Answer✔pressure and vacuum
a compressor that has a broken reed valve will cause these symptoms - Answer✔high suction
pressure and low discharge pressure
a customer complains that their air conditioning system is running constantly, but not cooling
enough. the suction line is very cold and the compressor is sweating, the most likely cause is -
Answer✔a restriction of the return air or a dirty evaporator
a customer reports that their residential split system had a compressor replaced last week by
another service company. Now the unit is not cooling properly. when you arrive and inspect the
unit, you find that the evaporator seems to be starved for refrigerant. on examining the
condensing unit you find that the liquid line is sweating where it leaves the drier. This is most
likely the result of - Answer✔debris from the burned out compressor has clogged the drier
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
a decrease in superheat causes the thermostatic expansion valve to begin to - Answer✔close
A dirty evaporator in an air conditioning system will cause these symptoms - Answer✔low
suction pressure and low discharge pressure
a faulty condenser fan motor on an air conditioning system will cause these symptoms -
Answer✔high suction pressure and high discharge pressure
a liquid receiver is used to - Answer✔store liquid refrigerant
a liquid to suction heat exchanger is often used to - Answer✔increase liquid subcooling
a low pressure cut off switch is used to - Answer✔establish minimum operating pressure in the
evaporator
a low refrigerant charge in an air conditioning system will causes these symptoms -
Answer✔low suction pressure and low discharge pressure
a mechanical shaft seal is necessary on a - Answer✔open drive compressor
a partially clogged capillary tube can cause - Answer✔a starved evaporator
a partially iced over evaporator can be caused by - Answer✔an undercharge
a refrigerant gives up heat when - Answer✔it condenses
A refrigerant overcharge in a capillary tube air conditioning system will cause these symptoms -
Answer✔high suction pressure and high discharge pressure
2
