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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Evaporator
Expansion valve
Condenser
Compressor

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Refrigeration and Air Conditioning
Air refrigerator works on

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

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Copper
Brass
Steel
Aluminium

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Non-frosting evaporator
Frosting evaporator
Defrosting evaporator
None of these

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

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

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Refrigeration and Air Conditioning
The capillary tube is not used in large capacity refrigeration systems because

It is made of copper
Required pressure drop cannot be achieved
Capacity control is not possible
Cost is too high

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