If driver speed is 1000 rpm and sprocket ratio is 4:1, the driven speed is ______ rpm.

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Study for the PMMI Mechanical Drives Test with engaging multiple choice questions and detailed explanations. Enhance your knowledge on mechanical drives and get ready for your exam!

Multiple Choice

If driver speed is 1000 rpm and sprocket ratio is 4:1, the driven speed is ______ rpm.

Explanation:
In a chain or belt drive, the speed of the driven sprocket is inversely related to the size ratio between the driven and the driver. If the driven sprocket has four times as many teeth as the driver, it turns four times slower. So the driven speed is the driver speed divided by four: 1000 rpm ÷ 4 = 250 rpm. This reflects how a larger driven sprocket reduces speed (and increases torque) compared to the driver.

In a chain or belt drive, the speed of the driven sprocket is inversely related to the size ratio between the driven and the driver. If the driven sprocket has four times as many teeth as the driver, it turns four times slower. So the driven speed is the driver speed divided by four: 1000 rpm ÷ 4 = 250 rpm. This reflects how a larger driven sprocket reduces speed (and increases torque) compared to the driver.

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