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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Decreases C.O.P.
None of these
Does not alter C.O.P.
Increases C.O.P.

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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 optimum effective temperature for human comfort is

Lower in winter than in summer
Not dependent on season
Same in winter and summer
Higher in winter than in summer

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

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Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

None of these
Positive
Zero
Negative

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

Corrosion of steel plates
Freezing at the expansion valve
Restriction to refrigerant flow
All of these

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MORE MCQ ON Refrigeration and Air Conditioning

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