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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.

Same
Less
More
None of these

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

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

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Refrigeration and Air Conditioning
During sensible cooling,

Relative humidity remains constant
Wet bulb temperature increases
Partial pressure of vapour remains constant
Specific humidity increases

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Sulphur dioxide
Ammonia
Carbon dioxide
R-12

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Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air

None of the listed here
Is lower than that of the entering air
Can be lower or higher than that of the entering air
Is higher than that of the entering air

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Refrigeration and Air Conditioning
Ammonia is

Toxic and non-inflammable
Non-toxic
Non-inflammable
Highly toxic and inflammable

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MORE MCQ ON Refrigeration and Air Conditioning

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