Allied & ICAR Exam Bank • ALLIED_0130 MCQ • 1 Mark

Section 2: Farm Machinery

Machine Design

Subtopic: Design and selection of machine elements – gears, pulleys, chains and sprockets and belts

Question Statement:

The primary advantage of helical gears over spur gears in high-speed farm machinery transmissions is:

Options:

  • (A) Gradual tooth engagement resulting in smoother and quieter operation with higher load capacity
  • (B) Zero axial thrust force
  • (C) Cheaper manufacturing cost
  • (D) Elimination of gear oil requirements

Answer Key:

A

Step-by-Step Solution & Explanation

Helical gear teeth engage gradually along an inclined line of contact rather than across the entire tooth width simultaneously, reducing impact and noise.
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