Question Bank • QB_FP_119 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Engine components

Question Statement:

In a standard four-cylinder four-stroke in-line diesel engine, the most commonly adopted firing order to maintain optimal dynamic rotational balance is:

Options:

  • (A) 1 - 2 - 3 - 4
  • (B) 1 - 3 - 4 - 2
  • (C) 1 - 4 - 2 - 3
  • (D) 1 - 3 - 2 - 4

Answer Key:

B

Step-by-Step Solution & Explanation

A firing order of 1-3-4-2 (or 1-2-4-3) provides symmetrical power impulse distribution along the crankshaft throws, balancing secondary rocking couples and minimizing torsional vibration.
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