Excavator Operator Certification Exam Prep · Question
What is the typical 'locate tolerance zone' in Ontario, as defined by the Ontario Underground Infrastructure Notification System Act, for a marked underground utility line without specific instructions from the utility owner?
In Ontario, the tolerance zone is typically 0.3 metres (1 ft) on either side of the marks and the horizontal extent of the facility. This means mechanical excav
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Question: What is the typical 'locate tolerance zone' in Ontario, as defined by the Ontario Underground Infrastructure Notification System Act, for a marked underground utility line without specific instructions from the utility owner?
Answer options: ✅ 0.3 metres (1 foot) on either side of the mark.
- 0.5 metres (1.6 feet) on either side of the mark.
- 1.0 metre (3.3 feet) on either side of the mark.
- The width of the utility itself plus 0.25 metres (0.8 feet) on each side.
Correct answer: 0.3 metres (1 foot) on either side of the mark.
Explanation: In Ontario, the tolerance zone is typically 0.3 metres (1 ft) on either side of the marks and the horizontal extent of the facility. This means mechanical excavation is often prohibited within 0.3m of the marked line's edge.
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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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