Excavator Operator Certification Exam Prep · Question
What is the purpose of a trench shield (or trench box)?
Trench shields are designed to protect workers from the hazards of potential trench collapse by creating a protected work area within the excavation.
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Question: What is the purpose of a trench shield (or trench box)?
Answer options:
- To prevent dirt from re-entering the trench. ✅ To protect workers inside the trench from trench collapse.
- To provide a stable platform for the excavator.
- To store tools and equipment within the trench.
Correct answer: To protect workers inside the trench from trench collapse.
Explanation: Trench shields are designed to protect workers from the hazards of potential trench collapse by creating a protected work area within the excavation.
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Question explanations
- During a final inspection of an excavator, prior to beginning work, an operator notices significant play in th
- An excavator operator is preparing to dig a trench in cohesive soil. To achieve maximum breakout force, what a
- Which control typically governs the arm (or dipper arm) movement for an excavator?
- What condition might require sloping or shoring of a trench less than 1.2 meters (4 feet) deep?
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