Allied & ICAR Exam Bank • ALLIED_1051NAT • 2 Marks
Section 2: Farm Machinery
Farm Machinery
Subtopic: Primary Tillage Implements
Question Statement:
A 3-bottom mouldboard plough with each bottom having a width of cut of 30 cm is operated at a depth of 15 cm and forward speed of 4.5 km/h. If the unit draft of the soil is 0.5 kg/cm$^2$, the draft of the plough (in kN) is: (Take $g = 9.81\text{ m/s}^2$)
Answer Key:
6.62
Step-by-Step Solution & Explanation
Total cross-sectional area of cut $A = n \times w \times d = 3 \times 30\text{ cm} \times 15\text{ cm} = 1350\text{ cm}^2$. Total draft in kg $= 1350 \times 0.5 = 675\text{ kg}$. In kN: $D = \frac{675 \times 9.81}{1000} = 6.622\text{ kN}$.