The air standard efficiency of an Otto cycle is given by (where r = C – McqOptions

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1.	The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)
A.	1 - rγ - 1
B.	1 + rγ - 1
C.	1 - (1/ rγ - 1)
D.	1 + (1/ rγ - 1)
Answer» D. 1 + (1/ rγ - 1)

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