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Refrigeration and Air Conditioning

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

Compressor
Condenser
Evaporator
Expansion valve

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Cools below 0°C
Requires little power consumption
Gives quiet operation
Gives noisy operation

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

Remains constant
None of these
Increases
Decreases

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Ammonia
Sulphur dioxide
Carbon dioxide
R-12

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Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 kg of dry air
1 kg of wet air
1 m3 of wet air
1 m3 of dry air

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

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

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MORE MCQ ON Refrigeration and Air Conditioning

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