Common Hazards第 25 / 100 题
Before entering an excavation deeper than 5 feet, what is generally required?
a.A protective system such as sloping, shoring, or shielding
b.Only a hard hat
c.Nothing, if the soil looks stable
d.Permission from customers
解析
Excavations 5 feet or deeper generally require a protective system such as sloping, benching, shoring, or a trench shield, unless made entirely of stable rock. A competent person must inspect the excavation. Trench cave-ins are a deadly caught-in/between hazard.
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