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Refrigeration and Air Conditioning

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

None of the listed here
Remains constant
Increases
Decreases

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

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Refrigeration and Air Conditioning
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

Coefficient of performance of refrigeration
Coefficient of performance of heat pump
Refrigerating efficiency
Relative coefficient of performance

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Freon
Aqua-ammonia
Water
Ammonia

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Refrigeration and Air Conditioning
The condition of refrigerant as it leaves the compressor in a vapour compression system is

Saturated liquid
Superheated vapour
Dry saturated vapour
Wet vapour

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Refrigeration and Air Conditioning
Chaperon equation is a relation between

Temperature, pressure and enthalpy
Temperature, pressure, specific volume and enthalpy
Temperature and enthalpy
Specific volume and enthalpy

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