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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

None of these
Equal to
Less than
More than

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

40 tons
5 tons
10 tons
0.1 ton

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

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

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Refrigeration and Air Conditioning
In a reversed Brayton cycle, the heat is absorbed by the air during

Constant pressure expansion process
Isentropic compression process
Isentropic expansion process
Constant pressure cooling process

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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)

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

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

Low weight per tonne of refrigeration
High heat transfer rate
Higher coefficient of performance
Low temperature at high altitudes

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MORE MCQ ON Refrigeration and Air Conditioning

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