To lock a drive shaft and a driven component so they do not slip, a __________ is used.

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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

To lock a drive shaft and a driven component so they do not slip, a __________ is used.

Explanation:
Transferring torque with a positive mechanical engagement is what this question is testing. To lock a drive shaft and a driven component so they do not slip, you use a key fastener. The key and the matching keyway in both parts create a positive connection that forces the hub to rotate with the shaft, so torque is transmitted through the key rather than merely by friction. Relying on a screw or set screw depends on surface clamping and friction, which can loosen or slip under load, while a spline is a different, more complex engagement; the straightforward, reliable way in many setups is a keyed connection with a key fastener.

Transferring torque with a positive mechanical engagement is what this question is testing. To lock a drive shaft and a driven component so they do not slip, you use a key fastener. The key and the matching keyway in both parts create a positive connection that forces the hub to rotate with the shaft, so torque is transmitted through the key rather than merely by friction. Relying on a screw or set screw depends on surface clamping and friction, which can loosen or slip under load, while a spline is a different, more complex engagement; the straightforward, reliable way in many setups is a keyed connection with a key fastener.

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