A gear train that has two or more gears on a single shaft is a _______________ gear drive.

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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

A gear train that has two or more gears on a single shaft is a _______________ gear drive.

Explanation:
Two or more gears fixed to the same shaft rotate together, forming a compound gear drive. This setup lets the gear train achieve multiple reduction stages while using fewer shafts, making the system more compact. In a simple gear drive, each gear sits on its own shaft, giving just a single stage of reduction. A differential is a special arrangement used to let wheels turn at different speeds, not a fixed-shaft multi-gear setup. A planetary drive involves a sun, planet, and ring gear in a specific configuration, which is different from the idea of multiple gears on one shaft. So the correct term for this arrangement is compound gear drive.

Two or more gears fixed to the same shaft rotate together, forming a compound gear drive. This setup lets the gear train achieve multiple reduction stages while using fewer shafts, making the system more compact. In a simple gear drive, each gear sits on its own shaft, giving just a single stage of reduction. A differential is a special arrangement used to let wheels turn at different speeds, not a fixed-shaft multi-gear setup. A planetary drive involves a sun, planet, and ring gear in a specific configuration, which is different from the idea of multiple gears on one shaft. So the correct term for this arrangement is compound gear drive.

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