Allied & ICAR Exam Bank • ALLIED_2797 MCQ • 1 Mark

Section 2: Farm Machinery

Machine Design

Subtopic: Overload safety devices used in farm machinery

Question Statement:

A slip clutch (friction safety clutch) on a tractor PTO drive operates by:

Options:

  • (A) Slipping when the torque demand exceeds the preloaded spring frictional torque
  • (B) Permanently fracturing a metal pin
  • (C) Disengaging the tractor engine clutch automatically
  • (D) Cutting off engine fuel supply

Answer Key:

A

Step-by-Step Solution & Explanation

Friction slip clutches use Belleville or coil springs pressing friction discs; when an obstacle jams the implement, the discs slip without damaging driveline components.
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