שאלה משלב א׳ ברפואה תעסוקתית · מועד 2020, שאלה 123

Correct: C — it is a relatively cheap control but depends on the worker's cooperation. That dependence on correct and consistent use is precisely why personal protection ranks last in the hierarchy. Option A calls it the preferred control, which it is not; option B calls it expensive with easy maintenance, which inverts both attributes; option D calls it more effective than engineering controls, which is the opposite of the accepted view.

מקור: לאדו ch.38, ע" מ658-659