The field office receives a written instruction: at what excavation depth is a protective system generally required unless an exception applies?
Correct Answer
A) 5 ft or deeper
5 ft or deeper is the controlling requirement.652(a)(1). Other choices: the distractors are related-looking contract or field terms, but they do not match the cited requirement for review item 169.
Why This Is the Correct Answer
5 ft or deeper is the controlling requirement.652(a)(1).
Why the Other Options Are Wrong
Option B: 3 ft; without the required inspection or documentation
The trap in B is 3 ft; without the required inspection or documentation. That selection is wrong because 3 ft; without the required inspection or documentation uses the wrong excavation protective-system trigger or exception.
Option C: 8 ft
Choice C gives 8 ft. Its specific error: 8 ft uses the wrong excavation protective-system trigger or exception.
Option D: 20 ft
Choice D (20 ft) is rejected because 20 ft uses the wrong excavation protective-system trigger or exception.
Memory Technique
Link excavation protection to its book condition; a different condition means a different answer than 5 ft or deeper.
Reference Hint
Open 29 CFR 1926 OSHA Construction Standards; use 29 CFR 1926.652(a)(1) to confirm that 5 ft or deeper is the controlling requirement.652(a)(1).
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