In a pulley drive, the driven shaft speed will ______ and torque will ______.

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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

In a pulley drive, the driven shaft speed will ______ and torque will ______.

Explanation:
In a pulley drive, the belt maintains the same linear speed on both pulleys. The relation is v = π D1 N1 = π D2 N2, so N2/N1 = D1/D2. If the driven pulley is larger than the driver (D2 > D1), the driven speed must be smaller than the driver, meaning the driven shaft slows down. With power roughly constant, a slower output speed means a higher output torque. So the driven shaft speed decreases and the torque on it increases.

In a pulley drive, the belt maintains the same linear speed on both pulleys. The relation is v = π D1 N1 = π D2 N2, so N2/N1 = D1/D2. If the driven pulley is larger than the driver (D2 > D1), the driven speed must be smaller than the driver, meaning the driven shaft slows down. With power roughly constant, a slower output speed means a higher output torque. So the driven shaft speed decreases and the torque on it increases.

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