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If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be ___________

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If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be ___________

(a) 2%

(b) 4%

(c) 8%

(d) 14%

I have been asked this question in semester exam.

Question is taken from Otto Cycle topic in chapter Air Standard Cycles and their Analysis of IC Engine

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Best answer
Right option is (d) 14%

The explanation: None.

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