Question Bank • QB_FM_129 NAT • 2 Marks

Section 2: Farm Machinery

Machine Design

Subtopic: Design and selection of machine elements – gears, pulleys, chains and sprockets and belts

Question Statement:

A chain drive has a driving sprocket with 18 teeth and a driven sprocket with 54 teeth. If the driving shaft speed is $720\text{ rpm}$, calculate the driven shaft speed in $\text{rpm}$.

Answer Key:

240

Step-by-Step Solution & Explanation

$N_2 = N_1 \times \frac{T_1}{T_2} = 720 \times \frac{18}{54} = 720 \times \frac{1}{3} = 240\text{ rpm}$
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