While operating a hydraulic excavator, the boom makes accidental contact with an overhead, uninsulated 7.2 kV powerline. The operator's immediate next action should be to:

Question: While operating a hydraulic excavator, the boom makes accidental contact with an overhead, uninsulated 7.2 kV powerline. The operator's immediate next action should be to:

Answer options:

• Attempt to swing the boom away from the line. ✅ Remain in the cab, warn others to stay clear, and call for help.
• Jump clear of the machine immediately.
• Lower the boom slowly to break contact.

Correct answer: Remain in the cab, warn others to stay clear, and call for help.

Explanation: If contact is made with an energized line, the safest action is to remain in the insulated cab, warn others away from the machine's step potential zone, and call for emergency services and utility assistance, as per OH&S and CCOHS guidance.