Allied & ICAR Exam Bank • ALLIED_2819 MCQ • 1 Mark

Section 2: Farm Machinery

Machine Design

Subtopic: Measurement of force, stress, torque, speed, displacement and acceleration on machine elements – shafts, couplings, keys, bearings and knuckle joints

Question Statement:

The rated life $L_{10}$ of a ball bearing subjected to radial load $P$ is inversely proportional to:

Options:

  • (A) $P^3$
  • (B) $P^{10/3}$
  • (C) $P^2$
  • (D) $P$

Answer Key:

A

Step-by-Step Solution & Explanation

For ball bearings with point contact, $L_{10} = (C/P)^p$ where $p = 3$. For roller bearings with line contact, $p = 10/3$.
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