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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.

None of these
More
Same
Less

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Refrigeration and Air Conditioning
The power per tonne of refrigeration is

O.P/3.5
3.5 × C.O.P.
3.5/C.O.P.
None of these

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Refrigeration and Air Conditioning
The relative humidity lines on a psychrometric chart are

Curved lines
Horizontal and non-uniformly spaced
Vertical and uniformly spaced
Horizontal and uniformly spaced

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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

3 kW
4 kW
1 kW
2 kW

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Iron
Rubber
Lead
Aluminium

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Evaporator
Expansion valve
Condenser
Compressor

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