Excavator Operator Certification Exam Prep · Question
An excavator boom accidentally makes contact with an overhead powerline. What is the operator's immediate action?
If contact is made, the safest action is to remain in the cab, warn others to stay away, and try to move the machine clear if possible and it won't worsen the s
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Question: An excavator boom accidentally makes contact with an overhead powerline. What is the operator's immediate action?
Answer options: ✅ Remain in the cab, warn others to stay clear, and attempt to move the machine away from the line if safe to do so.
- Immediately jump clear of the machine to avoid electrocution.
- Attempt to lower the boom quickly to break contact.
- Call 911 immediately and then exit the cab with one foot at a time.
Correct answer: Remain in the cab, warn others to stay clear, and attempt to move the machine away from the line if safe to do so.
Explanation: If contact is made, the safest action is to remain in the cab, warn others to stay away, and try to move the machine clear if possible and it won't worsen the situation. Exiting the cab incorrectly can create a path for electricity through the body, causing electrocution. Ontario OHSA Regulation 213/91, Section 188 outlines procedures for contact with live electrical wiring.
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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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