Interconnecting two or more single-station alarms to ensure simultaneous operation when one is actuated is an example of which concept?

• A. Independent local alarm only
• B. Two or more single-station alarms interconnected to trigger all alarms
• C. Manual pull station
• D. Audible only at the detector

Answer: (B)

Interconnecting alarms so they operate as a system rather than as isolated devices. When multiple single-station alarms are linked on a common signaling circuit, triggering one device sends a signal to the others, causing all of them to sound. This provides broader, faster warning throughout the building and is the essence of the concept being tested. It isn’t about alarms staying local to one device, nor about a user pulling a station to start the alarm, nor about sound being heard only at a detector. Interconnection ensures simultaneous activation across all connected units.