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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Air
CO2
Freon-11
Freon-22

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

Dew point temperature
Dry bulb temperature
None of these
Wet bulb temperature

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Carbon dioxide
Ammonia
Sulphur dioxide
R-12

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Refrigeration and Air Conditioning
The value of C.O.P in vapour compression cycle is usually

Any one of the above
Always less than unity
Equal to unity
Always more than unity

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Refrigeration and Air Conditioning
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

More
Less
Same
More/less depending on rating

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Water and water
Water and lithium bromide
Ammonia and lithium bromide
Ammonia and water

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MORE MCQ ON Refrigeration and Air Conditioning

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