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Refrigeration and Air Conditioning

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

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

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Refrigeration and Air Conditioning
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

Absorber
Condenser
Evaporator
None of these

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Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Condenser
Compressor
Evaporator
Expansion valve

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Aluminium
Iron
Lead
Rubber

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Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

Ammonia
R-11
R-22
R-12

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

High side float valve
Automatic expansion valve
Thermostatic expansion valve
Low side float valve

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