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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

0.8
0.25
0.5
1.25

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Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

Ammonia
R-11
R-22
R-12

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when it is not affected by the moisture present in the air, is called

Dry bulb temperature
Dew point temperature
Wet bulb temperature
None of these

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Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

20 to 50°C
None of these
50 to 70°C
70 to 110°C

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

All of these
Halide torch
Soap and water
Sulphur sticks

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Increases
Decreases
None of these
Remains constant

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