While operating a mail sorting machine, you notice it's making an unusual sound and processing speed has dropped. What is the BEST action?

Automated equipment issues left unaddressed often cause: (1) DAMAGE to the machine (small issues become large repair bills); (2) DAMAGE to mail (jams, torn envelopes, damaged packages); (3) SAFETY HAZARDS (loose parts, electrical issues, overheating); (4) PROCESSING ERRORS (machine sorts to wrong destinations); (5) DOWNTIME later when issue cascades. The exam is screening for candidates who: (1) RECOGNIZE problem signs (unusual sound, speed drop, error messages); (2) USE PROPER SHUTDOWN procedures (lockout-tagout if needed; not just emergency stop); (3) INVESTIGATE WITHIN training scope (check obvious causes if trained; don't go beyond training); (4) ESCALATE appropriately (maintenance for mechanical issues, supervisor for operational decisions); (5) DOCUMENT issues so patterns are tracked and root causes addressed. Wrong answers — ignoring, hitting, speeding up — all reflect the wrong approach to equipment problems. The right pattern is proactive attention + procedure-based response + appropriate escalation.