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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Air conditioning
Domestic refrigerators
Gas liquefaction
Commercial refrigerators

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

Restriction to refrigerant flow
Freezing at the expansion valve
Corrosion of steel plates
All of these

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Refrigeration and Air Conditioning
During sensible heating of air _________ decreases.

Wet bulb temperature
Specific humidity
Dry bulb temperature
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
In a refrigerating machine, heat rejected is _________ heat absorbed.

Equal to
Less than
Greater than
None of these

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

1/ B.P.F.
1 + B.P.F.
P.F. - 1
1 - B. P.F.

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