Question

question 6 of 10
the shaft of a belt drive may be bent if the maintenance person performs an alignment check with a straight edge and finds what condition?
o the straight edge cannot touch both of the sheaves at the same time.
o the straight edge initially contacts all four points, and after rotating the shaft, it only contacts two points
o the straight edge contacts only three of four points of the two sheaves.
o the straight edge scrapes the sheave
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Explanation:

When checking for a bent shaft in a belt drive, if the straight - edge initially contacts all four points (two on each sheave) and after rotating the shaft, it only contacts two points, this indicates that the shaft is not straight. A straight shaft would maintain contact with all four points (assuming proper alignment of sheaves) during rotation. If the straight - edge cannot touch both sheaves at the same time, it could be due to misalignment of sheaves rather than a bent shaft. Contacting only three of four points could also be due to sheave misalignment or other non - shaft - bending issues. Scraping the sheave is more likely a problem with sheave position or damage to the sheave/straight - edge rather than a bent shaft.

Answer:

The straight edge initially contacts all four points, and after rotating the shaft, it only contacts two points.