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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m/h
m/hK
m²/h

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.75
0.1
0.5
0.25

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

Dry bulb temperature
Relative humidity
Specific humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

None of these
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
μ/[1 - (1 - μ) (Ps/Pb)]
0.622 Pv/ (Pb - Pv)

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

None of these
Does not alter C.O.P.
Decreases C.O.P.
Increases C.O.P.

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Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called

Degree of saturation
Wet bulb depression
Dew point depression
Dry bulb depression

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