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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Carbon dioxide
Brine
Ammonia
Freon

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

0.1 ton
10 tons
5 tons
40 tons

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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

Small
Equal
High
Anything

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Refrigeration and Air Conditioning
The vapour compression refrigerator employs the following cycle

Reversed Carnot
Carnot
Rankine
Reversed Rankine

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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

3.33
4.33
1.33
2.33

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Refrigeration and Air Conditioning
The evaporator changes the low pressure liquid refrigerant from the expansion valve into

Low pressure liquid and vapour refrigerant
None of these
High pressure liquid refrigerant
Low pressure vapour refrigerant

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MORE MCQ ON Refrigeration and Air Conditioning

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