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Refrigeration and Air Conditioning

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

40 tons
10 tons
0.1 ton
5 tons

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

4.33
1.33
3.33
2.33

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Refrigeration and Air Conditioning
Carbon dioxide is

Colourless
Odourless
All of the listed here
Non-flammable

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Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

5.12
1
1.25
2.15

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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.

More
Equally
Less
Unpredictable

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Refrigeration and Air Conditioning
Ammonia is

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

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MORE MCQ ON Refrigeration and Air Conditioning

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