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Question
The mechanical efficiency (ηm) of the engine is given by
Options:
A .  ηm = B.P/I.P
B .  ηm = I.P/B.P
C .  ηm = (B.P × I.P)/100
D .  none of these
Answer: Option A
Answer: (a).ηm = B.P/I.P
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