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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Ericson
Carnot
Bell Coleman
Stirling

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Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

depends on other factors
decreases
increases
remains same

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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

Humidity ratio
Absolute humidity
Relative humidity
Degree of saturation

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Lower than
Higher than
Same as
None of the listed here

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is less than 1
Depends upon the make
Is equal to 1
Is more than 1

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

CO?
All of these
Ammonia
R-12

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