Allied & ICAR Exam Bank • ALLIED_0828 MCQ • 1 Mark

Section 2: Farm Machinery

Farm Machinery

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

Question Statement:

A shear bolt is incorporated in the PTO driveline of a rotary tiller or baler to:

Options:

  • (A) Serve as a mechanical sacrificial overload fuse that shears instantaneously when torque spikes beyond a safe limit
  • (B) Increase PTO shaft torque
  • (C) Prevent shaft vibration
  • (D) Lubricate the universal joint

Answer Key:

A

Step-by-Step Solution & Explanation

Under catastrophic jam conditions (hitting large rocks/stumps), the bolt shears in pure shear, disconnecting transmission and protecting gears.
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