Excavator Operator Certification Exam Prep · Question
Surface runoff from heavy rain is flowing into an excavation, eroding the side walls. What is the most effective immediate control measure the excavator operator can implement to prevent further erosion and potential wall collapse?
Surface water runoff causing erosion directly compromises trench stability. The most effective immediate control is to stop work and install berms or diversion
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Question: Surface runoff from heavy rain is flowing into an excavation, eroding the side walls. What is the most effective immediate control measure the excavator operator can implement to prevent further erosion and potential wall collapse?
Answer options:
- Increase the excavation depth to create a sump for water collection. ✅ Temporarily stop excavation and install berms or diversion ditches.
- Compact the remaining soil at the excavation lip with the excavator bucket.
- Excavate faster to complete the work before more water enters.
Correct answer: Temporarily stop excavation and install berms or diversion ditches.
Explanation: Surface water runoff causing erosion directly compromises trench stability. The most effective immediate control is to stop work and install berms or diversion ditches to route water away from the excavation, as outlined in O. Reg. 213/91 Section 234.
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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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