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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The relative coefficient of performance is

Actual COP × theoretical COP
Theoretical COP/actual COP
Actual COP/theoretical COP
None of these

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

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

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Ammonia vapour is driven out of solution
Weak solution mixes with strong solution
Ammonia vapour goes into solution
Lithium bromide mixes with ammonia

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

All of these
Raise the pressure of the refrigerant
Raise the temperature of the refrigerant
Circulate the refrigerant through the refrigerating system

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

More than
Equal to
None of these
Less than

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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

Bright green
Yellow
Red
Orange

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