Question Bank • QB_FP_ADV_006 NAT • 2 Marks

Section 3: Farm Power

Tractors and Power Tillers

Subtopic: Power transmission systems – gear trains, differential, final drives and power take-off

Question Statement:

A tractor PTO shaft operating at standard $540\text{ rpm}$ is driven directly from the engine crankshaft rotating at $2160\text{ rpm}$. The speed reduction ratio between the engine crankshaft and PTO shaft is ________ (answer in integer).

Answer Key:

4

Step-by-Step Solution & Explanation

The speed reduction ratio is given by: $\text{Ratio} = \frac{N_{\text{engine}}}{N_{\text{PTO}}} = \frac{2160\text{ rpm}}{540\text{ rpm}} = 4.0$ Thus, the speed reduction ratio is exactly 4.
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