GATE AG 2020 • Q16 MCQ • 1 Mark

Section 3: Farm Power

Tractors and Power Tillers

Subtopic: Traction theory

Question Statement:

A self-propelled wheel does not have:

Options:

  • (A) Wheel torque
  • (B) Tractive power
  • (C) Rolling resistance
  • (D) Drawbar pull

Official Answer Key:

D

Step-by-Step Solution & Explanation

A self-propelled (powered) wheel, when not towing any external load, develops just enough tractive force to overcome its own rolling resistance — i.e., net drawbar pull is zero. It still possesses wheel torque, tractive power, and rolling resistance.

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