Question Bank • QB_FM_009 MCQ • 1 Mark

Section 2: Farm Machinery

Farm Machinery

Subtopic: Soil tillage

Question Statement:

In a tractor-operated tandem disc harrow, increasing the gang angle $(\theta)$ causes:

Options:

  • (A) Increased depth of soil penetration and increased draft requirement
  • (B) Decreased depth of soil penetration and increased draft requirement
  • (C) Increased depth of soil penetration and decreased draft requirement
  • (D) No change in penetration depth or draft requirement

Answer Key:

A

Step-by-Step Solution & Explanation

Increasing the gang angle increases the angle of attack of the concave disc edges relative to the direction of travel. This increases the soil pulverization and depth of cut (penetration), which simultaneously increases the draft resistance.
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