The procedure for aligning two shafts is to check and correct for __________and______misalignment in two planes, vertical and horizontal.

• A. angular and parallel
• B. radial and tangential
• C. vertical and rotational
• D. horizontal and vertical

Answer: (A)

When aligning two shafts, focus on two types of misalignment: angular and parallel (offset). Angular misalignment means the shaft axes are not in a straight line and form an angle with each other. Parallel misalignment (offset) means the axes are parallel but not coincident, so the centerlines are displaced. Because these misalignments can appear in both the vertical and horizontal directions, you check and correct both components in both planes to ensure both shafts run truly in line. Terms like radial/tangential or vertical/rotational aren’t the standard way to describe the primary shaft misalignment you’re addressing, so the combination of angular and parallel covers the complete correction needed.