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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During sensible cooling of air, specific humidity

Decreases
None of the listed here
Increases
Remains constant

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Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Back pressure
Critical pressure
Discharge pressure
Suction pressure

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Sulphur dioxide
Carbon dioxide
Ammonia
R-12

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Refrigeration and Air Conditioning
The relative coefficient of performance is

Theoretical COP/actual COP
Actual COP/theoretical COP
Actual COP × theoretical COP
None of these

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

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

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Refrigeration and Air Conditioning
The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is

Equal
Smaller
Bigger
Smaller/bigger depending on capacity

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