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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

1.25
0.25
0.5
0.8

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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

4
43834
43833
3

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

Remains constant
Decreases
None of the listed here
Increases

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Refrigeration and Air Conditioning
The vapour compression refrigerator employs the following cycle

Rankine
Reversed Rankine
Reversed Carnot
Carnot

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

420 kJ/min
210 kJ/min
21 kJ/min
620 kJ/min

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Refrigeration and Air Conditioning
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by

Generator
Absorber, generator and liquid pump
Liquid pump
Absorber and generator

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