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DC 3RD CLASS EXAM STUDY GUIDE QUESTIONS WITH COMPLETE AND ACCURATE SOLUTIONS

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DC 3RD CLASS EXAM STUDY GUIDE QUESTIONS WITH COMPLETE AND ACCURATE SOLUTIONS

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Uploaded on: November 6, 2025
Number of pages: 5
Written in: 2025/2026
Type: Exam (elaborations)
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dc 3rd class exam study guide questions with compl

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DC 3RD CLASS EXAM STUDY GUIDE
QUESTIONS WITH COMPLETE AND ACCURATE
SOLUTIONS

◉ Basic Components of Refrigeration Systems. Answer: Compressor
(Heart of the system) : Pumps refrigerant vapor

Condenser: Releases or absorbs heat from the refrigerant

Refrigerant Control(Metering Device): Releases liquid refrigerant
when it is needed

Evaporator: Absorbs heat from the medium being cooled.

Refrigerant: Heat transfer medium that absorbs and releases heat
through

◉ Compressor. Answer: Inlet from Evaporator, refrigerant is a low
temperature / low pressure vapor.

Outlet is a high pressure / high temperature vapor

, ◉ Condenser. Answer: Inlet from compressor, refrigerant is a high
pressure / high temperature vapor.

Outlet is a high pressure / low temperature liquid

◉ Metering Device. Answer: Inlet from condenser, refrigerant is in a
low temperature / high pressure liquid.

Outlet is a medium pressure / medium temperature vapor / liquid.

◉ Evaporator. Answer: Inlet from meter device, refrigerant is in
medium pressure / medium temperature vapor / liquid

Outlet is a low pressure / low temperature vapor

◉ R-11 Color?. Answer: Orange

◉ R-12 Color?. Answer: White

◉ R-22 Color?. Answer: Light Green

◉ R-123 Color?. Answer: Light Gray

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DC 3RD CLASS EXAM STUDY GUIDE QUESTIONS WITH COMPLETE AND ACCURATE SOLUTIONS

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