Allied & ICAR Exam Bank • ALLIED_2815 NAT • 2 Marks

Section 2: Farm Machinery

Machine Design

Subtopic: Measurement of force, stress, torque, speed, displacement and acceleration on machine elements – shafts, couplings, keys, bearings and knuckle joints

Question Statement:

A tractor PTO shaft rotates at $N = 540\text{ rpm}$ while transmitting $P = 27\text{ kW}$. The transmitted torque in $\text{N}\cdot\text{m}$ (using $\pi = 3.1416$) is:

Answer Key:

477.5

Step-by-Step Solution & Explanation

$T = \frac{60 P}{2\pi N} = \frac{60 \times 27000}{2 \times 3.1416 \times 540} = \frac{1620000}{3392.9} \approx 477.5\text{ N}\cdot\text{m}$.
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