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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

All of these
R-12
CO?
Ammonia

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Refrigeration and Air Conditioning
Ammonia is

Toxic and non-inflammable
Highly toxic and inflammable
Non-inflammable
Non-toxic

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Refrigeration and Air Conditioning
The specific humidity during humidification process

None of these
Increases
Remains constant
Decreases

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

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Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Compressor
Evaporator
Condenser
Expansion valve

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

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

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