The mechanical efficiency (ηm) of an I.C. engine is equal to (where I – McqOptions

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1.	The mechanical efficiency (ηm) of an I.C. engine is equal to (where I.P. = Indicated power, B.P. = Brake power and F.P. = Frictional power)
A.	.P/B.P.
B.	.P/I.P.
C.	.P/F.P.
D.	.P/B.P.
Answer» C. .P/F.P.

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