Allied & ICAR Exam Bank • ALLIED_0123 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 flanged coupling has 4 bolts on a bolt circle diameter of $160\text{ mm}$ ($R = 80\text{ mm}$). If the maximum permissible shear force per bolt is $3\text{ kN}$, the torque transmission capacity in $\text{N}\cdot\text{m}$ is:

Answer Key:

960

Step-by-Step Solution & Explanation

Torque $T = n \cdot F \cdot R = 4 \times 3000\text{ N} \times 0.08\text{ m} = 960\text{ N}\cdot\text{m}$.
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