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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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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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