Excavator Operator Certification Exam Prep · Question
During excavation, an unknown underground pipe is uncovered that was not marked by 'One Call'. It appears to be an old, corroded steel pipe. What is the most appropriate action for the excavator operator?
Any unmarked utility discovered during excavation, especially unknown pipes, must be treated as active and potentially hazardous. Work must stop, the supervisor
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Question: During excavation, an unknown underground pipe is uncovered that was not marked by 'One Call'. It appears to be an old, corroded steel pipe. What is the most appropriate action for the excavator operator?
Answer options:
- Carefully try to identify the pipe by exposing more of it. ✅ Stop work immediately, notify the supervisor, and contact 'One Call' again.
- Cut through the pipe if it appears inactive and abandon it.
- Assume it's an abandoned pipe and continue excavating around it.
Correct answer: Stop work immediately, notify the supervisor, and contact 'One Call' again.
Explanation: Any unmarked utility discovered during excavation, especially unknown pipes, must be treated as active and potentially hazardous. Work must stop, the supervisor notified, and 'One Call' re-contacted for proper identification and instructions, as per all provincial OHS regulations.
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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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