Allied & ICAR Exam Bank • ALLIED_0144 NAT • 2 Marks

Section 2: Farm Machinery

Farm Machinery

Subtopic: Soil tillage

Question Statement:

A 2-bottom moldboard plow operating at $4.5\text{ km/h}$ has total width of cut $70\text{ cm}$ and depth $16\text{ cm}$. If soil specific draft is $0.6\text{ kg/cm}^2$, drawbar power required in kW (taking $g = 9.81\text{ m/s}^2$) is (rounded off to two decimal places):

Answer Key:

8.24

Step-by-Step Solution & Explanation

$A = 70 \times 16 = 1120\text{ cm}^2$. Draft $= 1120 \times 0.6 = 672\text{ kgf} = (672 \times 9.81)/1000 = 6.592\text{ kN}$. Speed $= 4.5 / 3.6 = 1.25\text{ m/s}$. Power $= 6.592 \times 1.25 = 8.24\text{ kW}$.
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