16. Air refrigeration cycle is used in –

A. domestic refrigerators

B. air-conditioning

C. gas liquefaction

D. commercial refrigerators

Click for Answer/Explanation

Correct Answer is C

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18. The wet-bulb depression is zero when relative humidity is –

A. 0

B. 0.5

C. 0.75

D. 1

Click for Answer/Explanation

Correct Answer is D

19. A condenser of the refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be –

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A. 1/3

B. 1/4

C. 3

D. 4

Click for Answer/Explanation

Correct Answer is D

20. A refrigerant with the highest critical pressure is –

A. R-11

B. R-12

C. Ammonia

D. R-22

Click for Answer/Explanation

Correct Answer is C

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