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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Stirling
Bell Coleman
Carnot
Ericson

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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
Relative coefficient of performance
Coefficient of performance of refrigeration

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

210 kJ/ min
420 kJ/ min
840 kJ/ min
21 kJ/ min

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

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

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

Decreases
Increases
Remains constant
None of the listed here

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.75
0.25
0.5
0.1

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