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Refrigeration and Air Conditioning

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
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
Condensing temperature in a refrigerator is the temperature

Of evaporator
Of cooling medium
Of freezing zone
At which refrigerant gas becomes liquid

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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
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

increases
remains same
depends on other factors
decreases

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Refrigeration and Air Conditioning
The central air conditioning system has ___________ overall efficiency as compared to individual systems.

Same
Higher
None of these
Lower

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MORE MCQ ON Refrigeration and Air Conditioning

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