A medical gas master or area alarm panel should be set to actuate a(an) __________ indicator when the communication with an alarm-initiating device is disconnected.

• A. Audible
• B. Audible and visual
• C. High and low
• D. Visual

Answer: (B)

When communication with a remote alarm-initiating device is lost, the panel must clearly alert responders. An alarm that is both audible and visual ensures the warning is noticed in any setting: sound can grab attention in busy or distant areas, while a flashing light or visible indicator catches attention in noisy environments or when someone isn’t looking directly at the panel. Relying on just one modality risks missing the alert, delaying a critical response to a communication failure. The other options don’t fit because high/low indicators pertain to pressure limits, not the status of communication with an alarm device, and a visual-only alert can be overlooked if the area isn’t being watched.