USPS · General

Before clearing a jam or performing maintenance on automated equipment, what safety step is most important?

Correct answer

Ensure the equipment is properly stopped and de-energized (locked out) per procedure before reaching into moving-part areas, preventing serious injury

  1. A Work quickly so the machine isn't down long
  2. B Ensure the equipment is properly stopped and de-energized (locked out) per procedure before reaching into moving-part areas, preventing serious injury
  3. C Just be careful while it runs
  4. D Have a coworker watch you do it quickly

Why this is the answer

LOCKOUT/ENERGY CONTROL SAFETY: Before clearing jams or doing maintenance involving moving-part areas, the most important step is to ensure the equipment is properly STOPPED and DE-ENERGIZED (locked out) per procedure. Reaching into running equipment — even 'carefully' or with a watcher — risks catastrophic injury (caught/crushed hands or limbs). The 476 VEA strongly emphasizes equipment safety; automated sorting machinery has powerful moving parts. Proper lockout/de-energizing procedures exist precisely to prevent the severe injuries that occur when workers reach into running equipment; following these procedures (never bypassing them for speed) is a critical, heavily weighted safety behavior.
Source: USPS 476 VEA — Safety, Lockout Before Maintenance

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