A protective system that uses a trench box or shield to protect workers is called:
a.Benching
b.Sloping
c.Sheeting
d.Shielding
Giải thích
Shielding uses a trench box or shield that does not prevent a cave-in but protects workers inside it. Sloping and benching cut back the walls; shoring supports them. Shielding is a distinct method.
Trích dẫn luật: 29 CFR 1926.652Luyện miễn phí toàn bộ 1632 câu hỏi — không cần đăng ký.
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Người kiểm duyệt Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — kiểm tra)