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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 m3 of wet air
1 kg of dry air
1 kg of wet air
1 m3 of dry air

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

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Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

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

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

420 kJ/min
210 kJ/min
620 kJ/min
21 kJ/min

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Decreases
None of these
Increases
Remains constant

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Wet vapour region
Sub-cooled liquid region
None of the listed here
Superheated vapour region

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