What is lockout/tagout used for?

• A. To lock doors for security.
• B. To tag tasks for later scheduling.
• C. A safety procedure to ensure machines are properly shut off during maintenance; only authorized personnel may perform.
• D. To disable software updates.

Answer: (C)

Lockout/tagout is a safety procedure that prevents injuries during maintenance by making sure machines are properly shut off and cannot be restarted until the work is finished. It works by isolating a machine’s energy sources—electrical, hydraulic, pneumatic, mechanical, and others—so the device can’t release energy unexpectedly. Locks are used on the energy-control devices to hold them in the off position, and warning tags are applied to show who is performing the work and that the machine should not be operated. Authorized, trained personnel carry out the setup and are the only ones allowed to remove the locks and tags after confirming the equipment is safe. This process protects workers from sudden startups or the release of stored energy, which can cause serious injuries. Other choices describe different concepts like door security, scheduling tasks, or software updates, which aren’t related to protecting people during machine maintenance.