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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

10°C
15°C
5°C
20°C

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Refrigeration and Air Conditioning
Aqua ammonia is used as refrigerant in the following type of refrigeration system

Indirect
Compression
Direct
Absorption

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Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

Dry saturated liquid refrigerant
A mixture of liquid and vapour refrigerant
None of these
Superheated vapour refrigerant

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Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

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

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

5 tons
10 tons
40 tons
0.1 ton

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Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

R-12
Carbon dioxide
Sulphur dioxide
Lithium bromide

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MORE MCQ ON Refrigeration and Air Conditioning

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