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Refrigeration and Air Conditioning

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

Freon-11
Air
CO2
Freon-22

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Refrigeration and Air Conditioning
Which of the following refrigerant is highly toxic and flammable?

R-12
Ammonia
Carbon dioxide
Sulphur dioxide

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

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

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Refrigeration and Air Conditioning
During humidification process, __________ increases.

Dry bulb temperature
Relative humidity
Wet bulb temperature
Specific humidity

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-30°C
-10.5°C
-77.7°C
-33.3°C

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Refrigeration and Air Conditioning
The condition of refrigerant after passing through the condenser in a vapour compression system is

Saturated liquid
Wet vapour
Superheated vapour
Dry saturated vapour

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MORE MCQ ON Refrigeration and Air Conditioning

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