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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

None of these
Increases C.O.P.
Does not alter C.O.P.
Decreases C.O.P.

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Refrigeration and Air Conditioning
In Electrolux refrigerator

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

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Refrigeration and Air Conditioning
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

Coefficient of performance of heat pump
Relative coefficient of performance
Refrigerating efficiency
Coefficient of performance of refrigeration

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Near critical temperature of refrigerant
Above critical temperature
Much below critical temperature
At critical Temperature

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Refrigeration and Air Conditioning
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the

Condenser to the expansion valve
Condenser to the evaporator
Expansion valve to the evaporator
Evaporator to the thermostat

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Refrigeration and Air Conditioning
Rating of a domestic refrigerator is of the order of

0.1 ton
10 tons
5 tons
40 tons

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MORE MCQ ON Refrigeration and Air Conditioning

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