OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
A worker is preparing to perform maintenance on a large industrial conveyor system. The system has multiple energy sources, including electrical, hydraulic, and pneumatic. To prevent unexpected startup or release of energy, which procedure must be implemented before starting work?
- AImplementing a comprehensive lockout/tagout (LOTO) procedure.
- BDisconnecting the main power switch at the nearest breaker.
- CNotifying all personnel in the immediate work area.
- DPosting 'Do Not Operate' signs on control panels.
Show answer & explanationAnswer & explanation
Correct answer: A. Implementing a comprehensive lockout/tagout (LOTO) procedure.
For equipment with multiple energy sources, a comprehensive lockout/tagout (LOTO) procedure is essential. LOTO ensures that all energy sources are de-energized, locked, and tagged out, preventing unexpected startup or release of stored energy, which could lead to severe 'caught-in/between' or 'struck-by' injuries.
Why the other options are wrong
- B. Disconnecting the main power switch is part of LOTO, but LOTO also addresses other energy sources and verification steps.
- C. Notification is an important step but does not physically prevent energy release.
- D. Signs alone are administrative controls and not sufficient to prevent accidental energization.
Lockout/Tagout (LOTO)
A safety procedure used to ensure that dangerous machines are properly shut off and not able to be started up again prior to the completion of maintenance or servicing work.
- Prevents unexpected energization or release of stored energy.
- Applies to all hazardous energy sources (electrical, mechanical, hydraulic, pneumatic, etc.).
- Involves placing locks and tags on energy-isolating devices.
Memory trick: Lock it out, tag it out, then you can shout (to start work safely)!