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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

43834
43833
3
4

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m²/h
m/hK
m/h

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

None of the listed here
Lower than
Higher than
Same as

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Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air

Is higher than that of the entering air
Can be lower or higher than that of the entering air
Is lower than that of the entering air
None of the listed here

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

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

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Refrigeration and Air Conditioning
In a reversed Brayton cycle, the heat is absorbed by the air during

Constant pressure expansion process
Isentropic compression process
Isentropic expansion process
Constant pressure cooling process

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