Excavator Operator Certification Exam Prep · Question
A trench is being excavated in soil determined to be Type 4. The trench is 2.0 metres deep. If a simple sloping method is chosen, what is the minimum horizontal dimension required for the sloped portion of the trench wall (from the bottom edge of the trench to the top edge at ground level) as per Ontario regulations?
For Type 4 soil, Ontario Regulation 213/91 Section 234(3) mandates a maximum slope of 1 vertical to 3 horizontal. Therefore, for a 2.0m deep trench, the horizon
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Question: A trench is being excavated in soil determined to be Type 4. The trench is 2.0 metres deep. If a simple sloping method is chosen, what is the minimum horizontal dimension required for the sloped portion of the trench wall (from the bottom edge of the trench to the top edge at ground level) as per Ontario regulations?
Answer options:
- 2.0 metres (1:1 slope)
- 3.0 metres (1:1.5 slope)
- 4.0 metres (1:2 slope) ✅ 6.0 metres (1:3 slope)
Correct answer: 6.0 metres (1:3 slope)
Explanation: For Type 4 soil, Ontario Regulation 213/91 Section 234(3) mandates a maximum slope of 1 vertical to 3 horizontal. Therefore, for a 2.0m deep trench, the horizontal dimension required is 2.0m x 3 = 6.0 metres.
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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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