ESCO Light Commercial Refrigeration Exam| Questions and V
erified Answers | 100% Correct | Grade A+
Multiple compressors provide: - Answer Capacity control
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: - Answer 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: - Answer Evaporator superheat.
An expansion device that is stick open will cause: - Answer A flooded evaporator
Superheat measurements are best taken: - Answer 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: - Answer A blocked
distributor
A TEV with an external equalizer is used on: - Answer Evaporators with a high pressure drop
Dry type evaporators operate most efficiently with a superheat setting of approximately: -
Answer 8*F to 12*F
, An evaporator used to chill liquids is operating with a normal superheat setting, but the system
is not cooling the product properly. Which of the following is the most likely cause? - Answer
overcharge of refrigerant
What time interval is required between each superheat adjustment? - Answer 10 to 15 min
When measuring evaporator superheat on a commercial system that has a long suction line, the
pressure reading should be taken at the: - Answer Evaporator outlet
A low temperature evaporator used for cooling space or product refrigeration: - Answer
Must be defrosted periodically
Some special application use a flooded evaporator (operated full of refrigerant). In order to
maintain the proper level of liquid refrigerant, a _____ type metering device is used. - Answer
Low side float.
A properly functioning condenser will first: - Answer De-superheat, then sub-cool.
The refrigerant condensing temperature in a water cooled condenser in normally about ____
higher than the leaving water. - Answer 10*F
Workable head pressure during periods of low ambient temperature can be achieved by using: -
Answer Fan-cycle control
The refrigerant in an air cooled condenser will normally condense at approximately higher____
temperature then the air passing over it. - Answer 30*F
erified Answers | 100% Correct | Grade A+
Multiple compressors provide: - Answer Capacity control
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: - Answer 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: - Answer Evaporator superheat.
An expansion device that is stick open will cause: - Answer A flooded evaporator
Superheat measurements are best taken: - Answer 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: - Answer A blocked
distributor
A TEV with an external equalizer is used on: - Answer Evaporators with a high pressure drop
Dry type evaporators operate most efficiently with a superheat setting of approximately: -
Answer 8*F to 12*F
, An evaporator used to chill liquids is operating with a normal superheat setting, but the system
is not cooling the product properly. Which of the following is the most likely cause? - Answer
overcharge of refrigerant
What time interval is required between each superheat adjustment? - Answer 10 to 15 min
When measuring evaporator superheat on a commercial system that has a long suction line, the
pressure reading should be taken at the: - Answer Evaporator outlet
A low temperature evaporator used for cooling space or product refrigeration: - Answer
Must be defrosted periodically
Some special application use a flooded evaporator (operated full of refrigerant). In order to
maintain the proper level of liquid refrigerant, a _____ type metering device is used. - Answer
Low side float.
A properly functioning condenser will first: - Answer De-superheat, then sub-cool.
The refrigerant condensing temperature in a water cooled condenser in normally about ____
higher than the leaving water. - Answer 10*F
Workable head pressure during periods of low ambient temperature can be achieved by using: -
Answer Fan-cycle control
The refrigerant in an air cooled condenser will normally condense at approximately higher____
temperature then the air passing over it. - Answer 30*F
