Which statement best describes lockout requirements during normal operating procedures?

Which statement best describes lockout requirements during normal operating procedures?

• A. Lockout is always required during normal operation.
• B. Lockout is not required during normal operation unless a guard is removed or bypassed.
• C. Lockout is never required.
• D. Lockout is required only for electronic equipment.

Answer: (B)

Lockout is an energy-isolation procedure used to prevent unexpected energization or the release of stored energy while work is being done on equipment. In normal operation, machinery is intended to run, so you don’t isolate it with a lock. Lockout becomes necessary when performing maintenance, repair, or servicing, and especially if a guard is removed or bypassed, to ensure the equipment cannot be restarted or energized while someone is working on it. This protects workers from sudden startup, movement, or energy release that could cause injury. Other options miss the practical use of lockout: applying it during routine operation would disrupt function and isn't how the procedure is intended to be used; it’s not never required, and it isn’t limited to electronic equipment—any energy source (electrical, hydraulic, pneumatic, mechanical, thermal, etc.) could need isolation.

Lockout is an energy-isolation procedure used to prevent unexpected energization or the release of stored energy while work is being done on equipment. In normal operation, machinery is intended to run, so you don’t isolate it with a lock. Lockout becomes necessary when performing maintenance, repair, or servicing, and especially if a guard is removed or bypassed, to ensure the equipment cannot be restarted or energized while someone is working on it. This protects workers from sudden startup, movement, or energy release that could cause injury.

Other options miss the practical use of lockout: applying it during routine operation would disrupt function and isn't how the procedure is intended to be used; it’s not never required, and it isn’t limited to electronic equipment—any energy source (electrical, hydraulic, pneumatic, mechanical, thermal, etc.) could need isolation.