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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

very little power consumption
cooling below 0°C
quiet operation
noisy operation

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Refrigeration and Air Conditioning
The pressure at the inlet of a refrigerant compressor is called

Critical pressure
Suction pressure
Discharge pressure
Back pressure

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

All of these
Freezing at the expansion valve
Restriction to refrigerant flow
Corrosion of steel plates

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Does not alter C.O.P.
Decreases C.O.P.
None of these
Increases C.O.P.

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Red
Bright green
Yellow
Orange

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Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

R-22
R-11
R-12
Ammonia

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MORE MCQ ON Refrigeration and Air Conditioning

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