Which of the following is a recognized alignment method?

Cross-dialing is a recognized alignment method due to its effectiveness in measuring shaft alignment in rotating machinery. This technique involves the use of dial indicators positioned on the shafts to measure any misalignments. By rotating the shafts, the indicators can detect variations in alignment, allowing for precise adjustments to bring the shafts into proper alignment. Cross-dialing is particularly valuable because it provides a clear visual representation of the misalignment, making it easier to achieve an accurate setup.

Other methods mentioned, while they may have their place, do not stand up to the recognition and reliability of cross-dialing as an established technique in millwright alignment practices. For example, plumb bob alignment may be used in some applications, but it lacks the precision needed in more complex machinery. Vibration alignment could be effective in monitoring the health of machines, but it does not directly address how to align machinery during setup. Magnetic alignment is not commonly recognized as a standalone method and may be used in conjunction with other techniques but lacks the comprehensive approach offered by cross-dialing.