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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

None of these
Decreases
Increases
Remains constant

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Refrigeration and Air Conditioning
Most of the domestic refrigerators work on the following refrigeration system

Electrolux refrigerator
Carnot cycle
Vapour absorption
Vapour compression

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Water
Freon
Aqua-ammonia
Ammonia

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

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

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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

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

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

Is immaterial
Results in loss of heat due to poor heat transfer
Increases heat transfer rate
Can be avoided by proper design

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MORE MCQ ON Refrigeration and Air Conditioning

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