1|Page
ESCO Light Commercial Refrigeration Exam||Verified
Exam!!! | Most Recent Exam 2026 Actual Complete
Real Exam Questions | Already Graded A+ |
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When the compressor service valve is back seated, which
port is closed? - Answers-Service port
The "low ambient control" is used to control - Answers-
Head pressure
In a dry type (direct expansion) evaporator, liquid
refrigerant must boil away as close to the end of the coil
as possible in order to: - Answers-Operate at high-
efficiency
The difference between the temperature of the refrigerant
boiling in the evaporator and the temperature at the
evaporator outlet is known as - Answers-Evaporator
superheat
An expansion device that is stuck open will cause -
Answers-A flooded evaporator
,2|Page
When measuring evaporator superheat on a commercial
system that has a long suction line, the pressure reading
should be taken at the - Answers-Compressor inlet
Superheat measurements are best taken - Answers-With
the system operating at design conditions
A technician is checking the superheat on a multi circuit
evaporator and finds one of the circuits has a superheat
that is higher than the others. This could be caused by -
Answers-A blocked distributor
A TXV with an external equalizer is used on - Answers-
Evaporators with a high pressure drop
Dry type evaporators operate most efficiently with the
superheat setting of approximately - Answers-8°F to 12°F
An evaporator used to chill liquids is operating within
normal superheat setting. But the system is not cooling the
product properly. Which of the following is most likely the
cause? - Answers-Overcharge of refrigerant
, 3|Page
What time interval is required between each superheat
adjustment? - Answers-About 10 to 15 minutes
A low temperature evaporator used for cooling space or
product refrigeration - Answers-Must be defrosted
periodically
Some special applications use a flooded evaporator
(operated full of refrigerant) in order to maintain the proper
level of liquid refrigerant, a ______ type devices used. -
Answers-Low side float
A properly functioning condenser will first - Answers-De-
superheat, then sub-cool
The effect of an inefficient water cooled condenser will -
Answers-Act the same as an air cooled condenser
The refrigerant condensing temperature in a water cooled
condenser is normally about _____ higher than the leaving
water. - Answers-10°F
ESCO Light Commercial Refrigeration Exam||Verified
Exam!!! | Most Recent Exam 2026 Actual Complete
Real Exam Questions | Already Graded A+ |
Guaranteed Success!! | Newest Exam!!!
When the compressor service valve is back seated, which
port is closed? - Answers-Service port
The "low ambient control" is used to control - Answers-
Head pressure
In a dry type (direct expansion) evaporator, liquid
refrigerant must boil away as close to the end of the coil
as possible in order to: - Answers-Operate at high-
efficiency
The difference between the temperature of the refrigerant
boiling in the evaporator and the temperature at the
evaporator outlet is known as - Answers-Evaporator
superheat
An expansion device that is stuck open will cause -
Answers-A flooded evaporator
,2|Page
When measuring evaporator superheat on a commercial
system that has a long suction line, the pressure reading
should be taken at the - Answers-Compressor inlet
Superheat measurements are best taken - Answers-With
the system operating at design conditions
A technician is checking the superheat on a multi circuit
evaporator and finds one of the circuits has a superheat
that is higher than the others. This could be caused by -
Answers-A blocked distributor
A TXV with an external equalizer is used on - Answers-
Evaporators with a high pressure drop
Dry type evaporators operate most efficiently with the
superheat setting of approximately - Answers-8°F to 12°F
An evaporator used to chill liquids is operating within
normal superheat setting. But the system is not cooling the
product properly. Which of the following is most likely the
cause? - Answers-Overcharge of refrigerant
, 3|Page
What time interval is required between each superheat
adjustment? - Answers-About 10 to 15 minutes
A low temperature evaporator used for cooling space or
product refrigeration - Answers-Must be defrosted
periodically
Some special applications use a flooded evaporator
(operated full of refrigerant) in order to maintain the proper
level of liquid refrigerant, a ______ type devices used. -
Answers-Low side float
A properly functioning condenser will first - Answers-De-
superheat, then sub-cool
The effect of an inefficient water cooled condenser will -
Answers-Act the same as an air cooled condenser
The refrigerant condensing temperature in a water cooled
condenser is normally about _____ higher than the leaving
water. - Answers-10°F
