Allied & ICAR Exam Bank • ALLIED_0126 MCQ • 1 Mark

Section 2: Farm Machinery

Machine Design

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

Question Statement:

Interference in involute spur gear teeth occurs when:

Options:

  • (A) The tip of the gear tooth makes contact with the non-involute flank of the pinion tooth below the base circle
  • (B) The pitch circles do not touch
  • (C) The module is excessively large
  • (D) Backlash is positive

Answer Key:

A

Step-by-Step Solution & Explanation

Interference happens when the addendum circle of one gear extends beyond the tangency limit of the line of action, digging into the radial non-involute flank below the base circle.
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