NCCER Millwright Practice Exam

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What is the purpose of a driver coupling jig in machinery setup?

To support the load
To align components accurately
To measure electrical outputs
To facilitate lubrication

The correct answer is: To align components accurately

A driver coupling jig is specifically designed to ensure that the components of machinery, such as the driver and driven shaft, are aligned accurately during the setup process. Proper alignment is critical because misalignment can lead to increased wear and tear on the machinery, vibration issues, and ultimately, mechanical failure. By using a coupling jig, technicians can take precise measurements and make adjustments needed to achieve optimal alignment, thereby enhancing the performance and longevity of the equipment. Supporting the load is an important aspect of machinery, but it is not the primary function of a driver coupling jig. Measuring electrical outputs and facilitating lubrication also serve significant purposes in machinery operation and maintenance, but these tasks are unrelated to the primary objective of ensuring accurate alignment between mechanical components. The focus of the coupling jig is solely on achieving proper alignment to prevent any operational issues related to misalignment.