In an Otto cycle, r is the compression ratio and \gamma is the adiabatic index. Which relation defines the air standard efficiency?

Correct Answer is : η=1−1rγ−1

\eta =1-1/r^{\gamma/{\gamma+1}}

SSC JE Mechanical Engineering 2018 Set 4 Paper

Question : 136 of 200

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In an Otto cycle, r is the compression ratio and

γ

is the adiabatic index. Which relation defines the air standard efficiency?

Solution:

η =1-1/r^{γ-1}

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