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