Allied & ICAR Exam Bank • ALLIED_2795 MCQ • 1 Mark

Section 2: Farm Machinery

Machine Design

Subtopic: Overload safety devices used in farm machinery

Question Statement:

A shear pin in the PTO driveline of a rotary tiller or baler acts as a sacrificial element designed to fail primarily in:

Options:

  • (A) Direct transverse shear
  • (B) Pure tension
  • (C) Pure torsion
  • (D) Buckling

Answer Key:

A

Step-by-Step Solution & Explanation

Shear pins are necked pins mounted perpendicularly across a coupling hub designed to shear off in direct transverse shear when transmitted torque exceeds safe threshold.
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