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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
A vapour absorption refrigerator uses _________ as a refrigerant.

Ammonia
Water
Aqua-ammonia
Freon

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Same as
Higher than
None of the listed here
Lower than

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

-86.6°C
-95.2°C
-135.8°C
-107.7°C

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

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

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Refrigeration and Air Conditioning
Which of the following refrigerant has the highest freezing point.

R-12
Ammonia
Carbon dioxide
Sulphur dioxide

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MORE MCQ ON Refrigeration and Air Conditioning

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