Excavator Operator Certification Exam Prep · Question
A trench is being excavated using a benching system in Type 2 soil. If the trench is 3.5 metres deep and the excavator bucket is 1.0 metre wide, what is the minimum required width of each bench, according to common provincial OHS standards?
For benching systems in Type 2 soil, provincial regulations (e.g., Ontario Reg. 213/91 Section 234(5)) typically require benches to have a minimum horizontal wi
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Question: A trench is being excavated using a benching system in Type 2 soil. If the trench is 3.5 metres deep and the excavator bucket is 1.0 metre wide, what is the minimum required width of each bench, according to common provincial OHS standards?
Answer options:
- 0.3 metres ✅ 0.6 metres
- 0.9 metres
- 1.2 metres
Correct answer: 0.6 metres
Explanation: For benching systems in Type 2 soil, provincial regulations (e.g., Ontario Reg. 213/91 Section 234(5)) typically require benches to have a minimum horizontal width of 0.6 metres (2 feet).
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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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