Question Bank • QB_SUB_MD_SAF_003 MCQ • 1 Mark

Section 2: Farm Machinery

Machine Design

Subtopic: Overload safety devices used in farm machinery

Question Statement:

Which type of safety overload clutch automatically disengages by axial displacement of spring-loaded detents and re-engages every 360 degrees when the torque drops below the trip threshold?

Options:

  • (A) Radial pin slip clutch
  • (B) Star ratchet (jump) clutch
  • (C) Sacrificial shear pin hub
  • (D) Hydraulic torque converter

Answer Key:

B

Step-by-Step Solution & Explanation

A star ratchet or spring-loaded detent clutch disengages with a characteristic clicking or jumping action when torque exceeds spring pre-load, re-engaging automatically when RPM or torque drops.
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