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Refrigeration and Air Conditioning

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

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Refrigeration and Air Conditioning
The vapour pressure of refrigerant should be

Equal to atmospheric pressure
Lower than atmospheric pressure
Could be anything
Higher than atmospheric pressure

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Refrigeration and Air Conditioning
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called

Sub-cooling or under-cooling
None of the listed here
Normal cooling
Super-cooling

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Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

very little power consumption
noisy operation
quiet operation
cooling below 0°C

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Refrigeration and Air Conditioning
The minimum temperature to which water can be cooled in a cooling tower is

Ambient air temperature
Dew point temperature of air
Dry bulb temperature of air
Wet bulb temperature of air

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m/h
m/hK
m²/h

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MORE MCQ ON Refrigeration and Air Conditioning

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