Allied & ICAR Exam Bank • ALLIED_0261 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Thermodynamic principles of I.C. engines

Question Statement:

The stoichiometric air-fuel ratio by mass for standard commercial diesel fuel is approximately:

Options:

  • (A) $14.5 : 1$
  • (B) $9.0 : 1$
  • (C) $25.0 : 1$
  • (D) $6.5 : 1$

Answer Key:

A

Step-by-Step Solution & Explanation

Complete stoichiometric combustion of diesel hydrocarbons ($C_{12}H_{23}$) requires approximately $14.5\text{ kg}$ air per kg fuel.
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