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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The freezing point of R-12 is

-107.7°C
-135.8°C
-95.2°C
-86.6°C

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Refrigeration and Air Conditioning
The dehumidification process, on the psychrometric chart, is shown by

Vertical line
Horizontal line
Curved line
Inclined line

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

Decreases
None of these
Remains constant
Increases

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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.

Less
More
Unpredictable
Equally

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

4.33
3.33
2.33
1.33

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Refrigeration and Air Conditioning
The Freon group of refrigerants are

Halocarbon refrigerants
Hydrocarbon refrigerants
Zoetrope refrigerants
Inorganic refrigerants

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MORE MCQ ON Refrigeration and Air Conditioning

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