Allied & ICAR Exam Bank • ALLIED_2979 NAT • 2 Marks

Section 3: Farm Power

Sources of Power

Subtopic: Bio-fuels and their use in farm mechanization

Question Statement:

The stoichiometric air-fuel ratio for pure ethanol ($\text{C}_2\text{H}_5\text{OH}$) is approximately $9.0\text{ kg air / kg fuel}$, compared to $14.7$ for gasoline. The ratio of ethanol stoichiometric AFR to gasoline stoichiometric AFR is approximately:

Answer Key:

0.61

Step-by-Step Solution & Explanation

Ratio = $9.0 / 14.7 \approx 0.612$.
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