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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/h
m²/hK
m/h
m/hK

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

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

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

Its bulb is surrounded by a wet cloth exposed to the air
The moisture present in it begins to condense
It is not affected by the moisture present in the air
None of these

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Refrigeration and Air Conditioning
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

None of the listed here
Effective temperature
Dew point temperature
Mean radiant temperature

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

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

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

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

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MORE MCQ ON Refrigeration and Air Conditioning

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