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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

Saturation point of liquid
Saturation point of vapour
Sublimation temperature
Triple point

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

All of these
Lowers compressor capacity because vapour is lighter
Increases power required per ton of refrigeration
Lowers evaporation temperature

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Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

(T₁ - T₂)/T₁
T₁ / (T₂ - T₁)
(T₂ - T₁)/T₁
T₂/ (T₂ - T₁)

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Refrigeration and Air Conditioning
Highest pressure encountered in a refrigeration system should be

Much below critical pressure
Critical pressure of refrigerant
Much above critical pressure
Near critical pressure

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 3
9: 1
1: 1
1: 9

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Refrigeration and Air Conditioning
Rating of a domestic refrigerator is of the order of

5 tons
10 tons
40 tons
0.1 ton

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MORE MCQ ON Refrigeration and Air Conditioning

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