Excavator Operator Certification Exam Prep · Question
A trench is being excavated in an urban area and is 4.0 metres deep. There are nearby structures. What method of excavation support would generally be preferred over simple sloping due to space constraints and the need to protect adjacent foundations?
In deep, narrow trenches, especially in urban areas with space constraints and nearby structures, a trench box or other engineered shoring system (e.g., sheet p
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Question: A trench is being excavated in an urban area and is 4.0 metres deep. There are nearby structures. What method of excavation support would generally be preferred over simple sloping due to space constraints and the need to protect adjacent foundations?
Answer options:
- Bench excavation
- Step sloping ✅ Trench box
- Spoil pile buttressing
Correct answer: Trench box
Explanation: In deep, narrow trenches, especially in urban areas with space constraints and nearby structures, a trench box or other engineered shoring system (e.g., sheet piling) is preferable to sloping, as sloping would require a much larger excavation footprint (O. Reg. 213/91, Section 232).
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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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