Allied & ICAR Exam Bank • ALLIED_2856 MCQ • 1 Mark

Section 2: Farm Machinery

Farm Machinery

Subtopic: Forces acting on a tillage tool

Question Statement:

Cone penetrometer index (Cone Index, CI) measures soil resistance by pressing a standardized $30^\circ$ circular cone at speed $30\text{ mm/s}$ and expressing CI in:

Options:

  • (A) Pressure units (kPa or MPa)
  • (B) Velocity units (m/s)
  • (C) Force units (kN)
  • (D) Dimensionless ratio

Answer Key:

A

Step-by-Step Solution & Explanation

ASABE S313 Cone Index is penetration force divided by the base area of the cone ($130\text{ or }323\text{ mm}^2$), expressed in kPa.
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