A permit-to-work system is used to authorize which types of high-risk activities?

• A. Routine maintenance tasks during normal operation.
• B. Office administration tasks.
• C. Low-risk electrical testing.
• D. Hot work and confined space entry.

Answer: (D)

Permit-to-work systems are about securing formal approval before starting tasks that have a real potential to cause harm if not controlled. They ensure risks are identified and mitigated with defined precautions, energy isolation, monitoring, and supervision before work begins. Hot work—like welding, flaming, or grinding—and confined space entry are classic high-risk activities because they can create fire hazards, toxic atmospheres, or life-threatening conditions in spaces with limited entry or exit. A permit for these tasks requires specific controls such as fire watch, removal of flammables, atmospheric testing, ventilation, and standby rescue, all documented and authorized before work starts. Routine maintenance during normal operation, office tasks, or low-risk electrical testing generally don’t involve these elevated hazards and are managed through standard procedures or safety rules rather than a permit-to-work.