Excavator Operator Certification Exam Prep · Question
An excavator operator is trenching in an area with a high water table. What is the most effective proactive measure to maintain trench stability and ensure safe working conditions as per Ontario O. Reg. 213/91?
Ontario O. Reg. 213/91, Section 234(3), requires measures to protect workers from hazards posed by water. Continuously pumping out water and installing dewateri
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Question: An excavator operator is trenching in an area with a high water table. What is the most effective proactive measure to maintain trench stability and ensure safe working conditions as per Ontario O. Reg. 213/91?
Answer options:
- Excavate the trench much wider to allow water to pool harmlessly. ✅ Continuously pump water out during excavation and install dewatering systems if necessary.
- Increase the excavation speed to minimize the time exposed to water.
- Place sandbags along the trench bottom to absorb groundwater.
Correct answer: Continuously pump water out during excavation and install dewatering systems if necessary.
Explanation: Ontario O. Reg. 213/91, Section 234(3), requires measures to protect workers from hazards posed by water. Continuously pumping out water and installing dewatering systems are crucial for maintaining trench stability and a safe work environment in high water table conditions.
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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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