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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

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

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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 vapour compression cycle, the refrigerant immediately after expansion valve is

Liquid
Wet vapour
Sub-cooled liquid
Saturated liquid

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Refrigeration and Air Conditioning
Rating of a domestic refrigerator is of the order of

0.1 ton
10 tons
40 tons
5 tons

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Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

remains same
depends on other factors
increases
decreases

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Refrigeration and Air Conditioning
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

Less
Unpredictable
More
Equally

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MORE MCQ ON Refrigeration and Air Conditioning

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