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Question
Which of the following statement is wrong?
Options:
A .  The performance of the vapour compression refrigerator varies considerably with both vaporising and condensing temperatures.
B .  In vapour compression cycle, the useful part of the heat transfer is at the condenser.
C .  In ammonia-hydrogen (Electrolux) refrigerator, no compressor, pump or fan is required.
D .  The effect of under-cooling the liquid refrigerant is to decrease the coefficient of performance.
Answer: Option D
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