Allied & ICAR Exam Bank • ALLIED_0253 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Fuels and combustion

Question Statement:

A higher Cetane Number in diesel fuel indicates:

Options:

  • (A) Shorter ignition delay period and smoother combustion
  • (B) Higher knocking tendency
  • (C) Lower volatility
  • (D) High carbon residue

Answer Key:

A

Step-by-Step Solution & Explanation

Higher cetane rating means the fuel self-ignites quickly upon injection, preventing sudden explosive pressure rise (diesel knock).
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