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

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1.	The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and ≈í‚â• = Ratio of specific heats)$?
A.	1 - r≈í‚â• - 1
B.	1 + r≈í‚â• - 1
C.	1 - (1/ r≈í‚â• - 1)
D.	1 + (1/ r≈í‚â• - 1)
Answer» D. 1 + (1/ r≈í‚â• - 1)

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