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Refrigeration and Air Conditioning

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

Halide torch
All of these
Soap and water
Sulphur sticks

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-77.7°C
-75.2°C
-56.6°C
-135.8°C

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Refrigeration and Air Conditioning
The process, generally used in summer air conditioning to cool and dehumidify the air, is called

Humidification
Cooling and dehumidification
Heating and humidification
Dehumidification

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Other factors decide C.O.P
Increases C.O.P
O.P remains unaltered
Decreases C.O.P

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Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Any value
High, of the order of 25°
Zero
As low as possible (3 to 11°C)

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

None of these
Equal to
More than
Less than

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MORE MCQ ON Refrigeration and Air Conditioning

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