Which statement best describes lockout/tagout (LOTO) in an industrial setting?

Which statement best describes lockout/tagout (LOTO) in an industrial setting?

• A. To isolate energy sources during maintenance to prevent unexpected startup or release of energy.
• B. It is used primarily for documenting equipment calibration.
• C. It replaces safety signage and device guards.
• D. It is optional during maintenance activities.

Answer: (A)

Lockout/tagout is a safety procedure focused on preventing hazardous energy from being released or machines from starting up while maintenance is being performed. The main idea is to isolate all energy sources—electrical, hydraulic, pneumatic, mechanical, thermal, and others—and apply locks or tags to controls so that the equipment cannot be energized or re-energized accidentally. This includes steps like shutting down the machine, isolating its energy sources, placing lockout devices and warning tags, and testing to confirm that the energy is truly isolated before work begins. Only after the maintenance is finished and the locks/tags are removed in accordance with the procedure can the equipment be re-energized and returned to service. This approach directly prevents surprising startups or energy releases that could injure workers. It isn’t about documenting calibration, it doesn’t replace safety signage or guards, and it isn’t optional—LOTO is a deliberate, mandated control used to protect workers during servicing and repair.

Lockout/tagout is a safety procedure focused on preventing hazardous energy from being released or machines from starting up while maintenance is being performed. The main idea is to isolate all energy sources—electrical, hydraulic, pneumatic, mechanical, thermal, and others—and apply locks or tags to controls so that the equipment cannot be energized or re-energized accidentally. This includes steps like shutting down the machine, isolating its energy sources, placing lockout devices and warning tags, and testing to confirm that the energy is truly isolated before work begins. Only after the maintenance is finished and the locks/tags are removed in accordance with the procedure can the equipment be re-energized and returned to service. This approach directly prevents surprising startups or energy releases that could injure workers.

It isn’t about documenting calibration, it doesn’t replace safety signage or guards, and it isn’t optional—LOTO is a deliberate, mandated control used to protect workers during servicing and repair.