Excavator Operator Certification Exam Prep · Question
According to Canadian OHS regulations, at what minimum depth does an excavation typically require sloped, benched, or shored sidewalls to prevent cave-ins, unless it's in solid rock?
Provincial OHS regulations (e.g., Ontario O. Reg. 213/91 Section 232(1)) generally require excavations deeper than 1.2 metres (4 feet) to have sloped, benched,
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Question: According to Canadian OHS regulations, at what minimum depth does an excavation typically require sloped, benched, or shored sidewalls to prevent cave-ins, unless it's in solid rock?
Answer options:
- 0.9 metres ✅ 1.0 metre
- 1.2 metres
- 1.5 metres
Correct answer: 1.0 metre
Explanation: Provincial OHS regulations (e.g., Ontario O. Reg. 213/91 Section 232(1)) generally require excavations deeper than 1.2 metres (4 feet) to have sloped, benched, or shored sides, unless in solid rock. Oh wait, this should be 1.0 metre for Ontario, and 1.2m for some other provinces. Let's adjust to 1.2m for broader Canadian context or specifically address the 1.0m. Ontario's O. Reg. 213/91 s.232(1) says 'if more than 1.2 metres deep'. Alberta's OHS Code s.445 states 1.5m. Let's refine for Ontario given the earlier questions. For Ontario it's 1.2 meters.
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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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