Allied & ICAR Exam Bank • ALLIED_0147 NAT • 2 Marks

Section 2: Farm Machinery

Farm Machinery

Subtopic: Soil tillage

Question Statement:

In a rotavator with rotor radius $r = 0.25\text{ m}$ rotating at $240\text{ rpm}$ and forward travel speed $v_f = 0.8\text{ m/s}$, the peripheral velocity ratio $\lambda = v_p / v_f$ is (rounded off to one decimal place):

Answer Key:

7.9

Step-by-Step Solution & Explanation

$\omega = 2\pi(240)/60 = 25.133\text{ rad/s}$. Peripheral speed $v_p = \omega r = 25.133 \times 0.25 = 6.283\text{ m/s}$. Velocity ratio $\lambda = 6.283 / 0.8 \approx 7.85 \approx 7.9$.
← Previous (ALLIED_0146) Next (ALLIED_0148) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test