Which action is lockout-tagout primarily used for?

• A. Reduce noise
• B. Schedule maintenance windows
• C. Prevent unauthorized operation of equipment
• D. Improve color grading

Answer: (C)

Lockout-tagout is a safety practice that protects workers by making sure machines can’t be turned on or energized while maintenance or repair is happening. The lock physically secures the energy source in the off position, and the tag communicates who is working on the equipment and that it must not be powered up. This prevents unexpected startup or the release of stored energy that could injure someone. It isn’t about reducing noise, scheduling maintenance windows, or improving color grading. For example, while servicing a powered press, the technician would shut off the machine, isolate all energy sources, apply a lock and a tag, and only restore power after the work is safely completed.