Allied & ICAR Exam Bank • ALLIED_0264 NAT • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Thermodynamic principles of I.C. engines

Question Statement:

An ideal Otto cycle has compression ratio $r = 10$. If $\gamma = 1.4$, efficiency is $1 - 10^{-0.4} = 1 - 0.3981 = 60.19\%$. The rounded efficiency percentage is:

Answer Key:

60.2

Step-by-Step Solution & Explanation

$\eta = 1 - 10^{-0.4} = 1 - 0.398107 = 0.60189 = 60.19\% \approx 60.2\%$.
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