What is lockout-tagout (LOTO) and why is it important in industrial settings?

• A. A safety procedure isolating energy sources during maintenance to prevent unexpected startup and injuries.
• B. A procedure for tagging outdated equipment for inventory.
• C. A method for enforcing work hours and break times.
• D. A process for labeling environmental hazards.

Answer: (A)

Lockout-tagout is the practice of isolating all energy sources on equipment before maintenance to prevent unexpected startup and injuries. This means identifying electrical, mechanical, hydraulic, pneumatic, thermal, and other energy forms, safely shutting the machine down, disconnecting or isolating those energy sources, and applying lockout devices (like padlocks) along with tags that indicate the equipment is not to be energized. Before work begins, the energy state is verified as zero, and only authorized workers with the proper training and keys can remove the locks and tags once the work is finished and the area is confirmed safe. This process protects workers from shocks, burns, or crush injuries and helps ensure compliance with safety standards while reducing the risk of accidental re-energization during maintenance. The other options aren’t about preventing unexpected energization or protecting workers during servicing, so they don’t address the core purpose of LOTO.