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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

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

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Equal
Anything
Small
High

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Higher than
Lower than
None of these
Same as

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m/h
m/hK
m²/hK
m²/h

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Refrigeration and Air Conditioning
The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is

Smaller/bigger depending on capacity
Smaller
Bigger
Equal

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

20°C DBT and 80% RH
25°C DBT and 100% RH
25°C DBT and 40% RH
22°C DBT and 60% RH

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MORE MCQ ON Refrigeration and Air Conditioning

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