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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during cooling and dehumidification

Decreases
Increases
None of these
Remains constant

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

High pressure side close to receiver
Low pressure side near receiver
Delivery of compressor
Suction of compressor

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

None of these
Remains constant
Decreases
Increases

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Rubber
Lead
Iron
Aluminium

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

High
Any value
Optimum
Low

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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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MORE MCQ ON Refrigeration and Air Conditioning

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