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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

Sulphur sticks
All of these
Halide torch
Soap and water

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Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Zero
High, of the order of 25°
As low as possible (3 to 11°C)
Any value

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

Increases C.O.P.
None of these
Decreases C.O.P.
Does not alter C.O.P.

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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
The capacity of a domestic refrigerator is in the range of

3 to 5 TR
0.1 to 0.3 TR
1 to 3 TR
5 to 7 TR

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Aluminium
Steel
Copper
Brass

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MORE MCQ ON Refrigeration and Air Conditioning

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