Heavy Equipment Operator Certification Exam Prep · Question
What is the primary function of a 'trench box' or 'trench shield'?
A trench box or shield is a protective system designed to safeguard workers by withstanding the forces of a cave-in, keeping them safe inside the structure. It
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Question: What is the primary function of a 'trench box' or 'trench shield'?
Answer options:
- A. To prevent ground water from entering the trench. ✅ B. To support the trench walls and prevent cave-ins, protecting workers within its confines.
- C. To provide a platform for workers to stand on inside the trench.
- D. To store tools and equipment within the excavation.
Correct answer: B. To support the trench walls and prevent cave-ins, protecting workers within its confines.
Explanation: A trench box or shield is a protective system designed to safeguard workers by withstanding the forces of a cave-in, keeping them safe inside the structure. It does not prevent soil movement but protects those within it.
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