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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Equal to
None of the listed here
Greater than
Less than

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

Remains constant
Decreases
Increases
None of these

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Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Halide torch which on detection produces greenish flame lighting
Using reagents
Smelling
Sulphur sticks which on detection gives white smoke

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Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

24 bars
Slightly above atmospheric pressure
56 bars
Atmospheric pressure

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

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

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is more than 1
Is less than 1
Is equal to 1
Depends upon the make

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