Excavator Operator Certification Exam Prep · Question
What is the primary hazard associated with water accumulation in an excavation, particularly for workers who might need to enter?
Water accumulation can significantly weaken trench walls, increasing the risk of collapse. It also can create a drowning hazard for workers and make escape diff
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Question: What is the primary hazard associated with water accumulation in an excavation, particularly for workers who might need to enter?
Answer options:
- Damage to the excavator's engine if it gets submerged. ✅ Increased risk of trench collapse due to saturated soil, drowning, and difficulty escaping.
- Higher chance of encountering underground utilities.
- Faster corrosion of metallic bracing in the trench.
Correct answer: Increased risk of trench collapse due to saturated soil, drowning, and difficulty escaping.
Explanation: Water accumulation can significantly weaken trench walls, increasing the risk of collapse. It also can create a drowning hazard for workers and make escape difficult. Provincial OHS regulations mandate steps to control water in excavations to protect workers.
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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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