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Question:
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_____ blends behave as a single substance refrigerants in the evaporating and condensing process:
Azeotropic
The ______ connects the compressor to the condenser
Discharge line
Freezing point of the refrigerant should be well above the expected evaporator temperature
False
Most of the refrigeration gases are heavier than air
True
Which of the following blended refrigerant can be used to substitute for R-12:
R-401A
The CFC and HCFC refrigerants were:
non toxic and non flammable
A low pressure switch is provided to stop the compressor when the compressor _______ pressure falls below the safety limits:
Suction
Refrigerants should have _____ dielectric strength
high
R-12 and R-22 have the highest specific volumes as vapors:
R-410a is the best replacement for R-22 refrigerant
Pressure drop in the refrigeration system is expressed in terms of:
Temperature units
Which of the following refrigerant have higher efficiency during longer run:
R-410a
The amount of the heat that the condenser rejects is always _____ than the heat removed in the evaporator:
Higher
HFC refrigerant can cause which of the following:
Global warming
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