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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

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

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Refrigeration and Air Conditioning
Air refrigerator works on

Both (A) and (B)
None of these
Reversed Carnot cycle
Bell Coleman cycle

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will be lower
Will remain unaffected
Will be higher
May be higher or lower depending upon the nature of non-condensable gases

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is very wet vapour

After passing through the condenser
After passing through the expansion or throttle valve
Before entering the compressor
Before passing through the condenser

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

-86.6°C
-135.8°C
-95.2°C
-107.7°C

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Nontoxic and non-inflammable
Toxic
Inflammable
Non-inflammable and toxic

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MORE MCQ ON Refrigeration and Air Conditioning

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