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Refrigeration and Air Conditioning

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

More than
Less than
None of these
Equal to

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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
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

Equally
Less
More
Unpredictable

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Cools below 0°C
Gives noisy operation
Requires little power consumption
Gives quiet operation

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Orange
Yellow
Red
Bright green

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Refrigeration and Air Conditioning
In chemical dehumidification process,

Dew point temperature decreases
Dry bulb temperature increases
Wet bulb temperature decreases
All of these

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