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Question
Which of the following statement is correct?
Options:
A .  The ratio of the discharge pressure to the inlet pressure of air is called compressor efficiency
B .  The compression ratio for the compressor is always greater than unity
C .  The compressor capacity is the ratio of work-done per cycle to the stroke volume
D .  During isothermal compression of air, the work-done in a compressor is maximum
Answer: Option B
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