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What this quiz covers This quiz is about trench and excavation hazards, especially cave-ins, soil conditions, spoil placement, protective systems, inspections, and safe entry rules. It tests whether you can spot when a trench is unsafe even if it looks normal at first glance.
On the job A trench can look solid in the morning and fail later because of vibration, rain, nearby traffic, or disturbed soil. Workers are often hurt when a trench is treated like routine digging instead of a high-risk confined excavation.
How to think about it Begin with depth, soil type, protective system, ladder access, and spoil pile placement. A common mistake is trusting appearance alone or skipping the role of the competent person. The safest answer is usually the one that assumes the trench is unstable until proven otherwise.
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