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What is the formula for specific fuel consumption (i.s.f.c.)?

a) i.s.f.c.=\(\frac{60 I.P.}{Wf} \)
b) i.s.f.c.=\(\frac{60 Wf}{I.P.} \)
c) i.s.f.c.=\(\frac{120 Wf}{I.P.} \)
d) i.s.f.c.=\(\frac{120 I.P.}{Wf} \)

Answer: b
Explanation: The total consumption of fuel by an engine under test conditions in a given time is determined by measuring its volume or weight. The specific fuel consumption is defined as the total consumption per hour or per KW developed.

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