If the evacuation horn sounds unintentionally, it must be __________.

• A. Deactivated
• B. Disabled
• C. Quieted
• D. Silenced

Answer: (D)

When the evacuation horn sounds unintentionally, the procedure is to silence it. Silencing stops the audible alert so passengers aren’t frightened or misled, while keeping the evacuation system ready in case a real evacuation becomes necessary. It’s a reversible action that allows crews to verify the situation and reset if needed. Deactivating or disabling would turn the system off or render it nonfunctional, which isn’t appropriate during an incident. Quieting isn’t the standard term used in procedures, whereas silencing specifically means stopping the sound while the system remains ready to sound again.