What safety measure is specifically required for manhole work?

• A. Use a blower for ventilation
• B. Operators wear safety harnesses, and standby help is required
• C. Manholes installed at every change
• D. New manhole covers must be 18 inches or larger

Answer: (B)

Manhole work involves entering a confined space where there can be limited entry and exit, poor ventilation, and hazardous atmospheres. The most essential safety measure specifically required is wearing a safety harness with a lifeline and having standby help ready. The harness and lifeline enable a quick rescue and evacuation if you slip, become incapacitated, or are overcome by gas or lack of oxygen, and the standby person is trained to perform the rescue. While ventilation can be helpful, it isn’t a universal requirement for every manhole task, and the other options don’t address the critical need for rapid retrieval and rescue in confined-space entry.