Question Bank • QB_FP_128 NAT • 2 Marks

Section 3: Farm Power

Farm Power

Subtopic: Calculation of power, torque, fuel consumption, heat load and power losses

Question Statement:

A tractor differential unit has a crown wheel with 44 teeth driven by a bevel pinion with 11 teeth. If the pinion rotates at $1200\text{ rpm}$, calculate the speed of the crown wheel in $\text{rpm}$.

Answer Key:

300

Step-by-Step Solution & Explanation

Reduction ratio: $i = \frac{T_{\text{crown}}}{T_{\text{pinion}}} = \frac{44}{11} = 4$ Crown wheel speed: $N_{\text{crown}} = \frac{N_{\text{pinion}}}{i} = \frac{1200}{4} = 300\text{ rpm}$
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