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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The relative coefficient of performance is

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

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-95.2°C
-86.6°C
-135.8°C
-107.7°C

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

More than
Equal to
Less than
None of these

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

1.33
2.33
3.33
4.33

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Toxic
Inflammable
Non-inflammable and toxic
Nontoxic and non-inflammable

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid

Before passing through the condenser
Before entering the expansion valve
After passing through the condenser
After passing through the expansion or throttle valve

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MORE MCQ ON Refrigeration and Air Conditioning

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