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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

15°C
20°C
10°C
5°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

Degree of saturation
Humidity ratio
Relative humidity
Absolute humidity

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Refrigeration and Air Conditioning
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

More
Equally
Less
Unpredictable

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Refrigeration and Air Conditioning
During sensible cooling of air, specific humidity

None of the listed here
Remains constant
Decreases
Increases

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Refrigeration and Air Conditioning
Which of the following refrigerant has the lowest freezing point?

R-11
R-22
Ammonia
R-12

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

CO2
Freon-22
Freon-11
Ammonia

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MORE MCQ ON Refrigeration and Air Conditioning

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