Excavator Operator Certification Exam Prep · Question
What is the primary risk associated with improperly shoring or sloping a trench in unstable soil conditions?
The most significant hazard of improperly addressing trench stability in unstable soil is a trench collapse, which can bury and suffocate workers, resulting in
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Question: What is the primary risk associated with improperly shoring or sloping a trench in unstable soil conditions?
Answer options:
- Increased water accumulation in the trench
- Reduced trenching efficiency ✅ Trench collapse, leading to serious injury or fatality for workers
- Difficulty in laying pipes straight
Correct answer: Trench collapse, leading to serious injury or fatality for workers
Explanation: The most significant hazard of improperly addressing trench stability in unstable soil is a trench collapse, which can bury and suffocate workers, resulting in severe injuries or fatalities. Provincial OHS regulations (e.g., O. Reg. 213/91, Alberta OHS Code Part 32) mandate proper protective measures to prevent such incidents.
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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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