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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The bank of tubes at the back of domestic refrigerator is

Evaporator tubes
Condenser tubes
Refrigerant cooling tubes
Capillary tubes

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

1.33
4.33
3.33
2.33

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-33.3°C
-77.7°C
-10.5°C
-30°C

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Refrigeration and Air Conditioning
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

Absolute humidity
Humidity ratio
Degree of saturation
Relative humidity

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Refrigeration and Air Conditioning
In chemical dehumidification process,

Wet bulb temperature decreases
All of these
Dry bulb temperature increases
Dew point temperature decreases

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-toxic
High boiling point
Non-flammable
Non-explosive

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MORE MCQ ON Refrigeration and Air Conditioning

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