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ESCO Light Commercial Refrigeration Exam (2024 / 2025) Questions with Verified Answers, 100% Guarantee Pass Score $12.99   Add to cart

Exam (elaborations)

ESCO Light Commercial Refrigeration Exam (2024 / 2025) Questions with Verified Answers, 100% Guarantee Pass Score

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ESCO Light Commercial Refrigeration Exam (2024 / 2025) Questions with Verified Answers, 100% Guarantee Pass Score

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  • October 8, 2024
  • 53
  • 2024/2025
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ESCO Light Commercial Refrigeration Exam.pdf file:///C:/Users/HP/Desktop/New%20fl/ESCO%20Light%20Comme




ESCO Commercial Refrigeration Certification Exam

Questions & Verified Answers



1. In a dry type (direct expansion) evaporator, liquid refrigerant must boil awayas close to

the end of the coil as possible in order to

A. operate at high efficiency.

B. ensure that frost does not accumulate.

C. sub-cool the compressor.

D. ensure proper oil return

Answer A. operate at high efficiency.



2. The difference between the temperature of the refrigerant boiling in the

evaporator and the temperature at the evaporator outlet is known as

A. evaporator superheat.

B. latent heat.






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C. evaporator sub-cooling.

D. sublimation

Answer A. evaporator superheat.



3. An expansion device that is stuck open will cause:

A. low suction pressure

B. a starved evaporator.

C. excessive superheat

D. a flooded evaporator:

Answer D. a flooded evaporator



4. When measuring evaporator superheat on a commercial system that has along suction

line, the pressure reading should be taken at the

A. compressor inlet.

B. evaporator outlet.

C. condenser outlet.

D. receiver Inlet

Answer A. compressor inlet. (Suction Line)





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5. Superheat measurements are best taken

A. during a hot pull down.

B. at 8°F to 12°F.

C. during defrost.

D. with the system operating at design conditions

Answer D. with the system operatingat design conditions.



6. 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.Thiscould be caused by

A. a dirty coil.

B. a refrigerant overcharge

C. uneven air distribution.

D. a blocked distributor

Answer D. a blocked distributor.



7. A TEV with an external equalizer is used on

A. evaporators with a high pressure drop.





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B. evaporators with a low pressure drop.









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