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Refrigeration and Air Conditioning

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

Remains constant
Decreases
Increases
None of these

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Refrigeration and Air Conditioning
During sensible cooling of air, specific humidity

Increases
Decreases
Remains constant
None of the listed here

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Refrigeration and Air Conditioning
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by

Liquid pump
Absorber and generator
Absorber, generator and liquid pump
Generator

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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
The reduced ambient air cooling system has

One cooling turbine and one heat exchanger
One cooling turbine and two heat exchangers
Two cooling turbines and two heat exchangers
Two cooling turbines and one heat exchanger

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

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

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