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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
None of these
Actual COP/theoretical COP

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Refrigeration and Air Conditioning
The domestic refrigerator uses following type of compressor

Piston type reciprocating
Centrifugal
Axial
Miniature sealed unit

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Ammonia evaporates in hydrogen
Hydrogen evaporates in ammonia
Ammonia is absorbed in hydrogen
Ammonia is absorbed in water

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Refrigeration and Air Conditioning
For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is

100
Zero
20
50

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Refrigeration and Air Conditioning
The vapour pressure of refrigerant should be

Equal to atmospheric pressure
Could be anything
Higher than atmospheric pressure
Lower than atmospheric pressure

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

-107.7°C
-135.8°C
-95.2°C
-86.6°C

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MORE MCQ ON Refrigeration and Air Conditioning

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