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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

CO?
Ammonia
R-12
All of these

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

Low weight per tonne of refrigeration
Higher coefficient of performance
High heat transfer rate
Low temperature at high altitudes

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

None of these
Increases
Remains constant
Decreases

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Increases heat transfer
Improves C.O.P. of the system
Reduces power consumption
Increases power consumption

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-135.8°C
-56.6°C
-75.2°C
-77.7°C

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Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

Lithium bromide
Carbon dioxide
Sulphur dioxide
R-12

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MORE MCQ ON Refrigeration and Air Conditioning

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