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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

4 kW
3 kW
1 kW
2 kW

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible cooling of air

Remains constant
Decreases
None of these
Increases

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Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Saturated air
Moist air
Dry air
Specific humidity

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Three fluids
Single fluid
None of the listed here
Two fluids

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Refrigeration and Air Conditioning
Air refrigerator works on

Both (A) and (B)
None of these
Reversed Carnot cycle
Bell Coleman cycle

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

3.33
1.33
4.33
2.33

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