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Refrigeration and Air Conditioning

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

-95.2°C
-107.7°C
-135.8°C
-86.6°C

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Less than
Equal to
None of the listed here
Greater than

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Hydrogen evaporates in ammonia
Ammonia is absorbed in water
Ammonia is absorbed in hydrogen
Ammonia evaporates in hydrogen

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

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

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

Positive
Zero
Negative
None of these

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Refrigeration and Air Conditioning
The superheated vapour region, in a pressure enthalpy chart, is represented by the space

To the left of saturated liquid line
Between the saturated liquid line and saturated vapour line
None of these
To the right of saturated liquid line

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