Which alarm system is directly transmitted to the fire department?

• A. Proprietary
• B. Central Station
• C. Local
• D. Auxiliary

Answer: (D)

The signal path is what the question is testing: which system is set up to notify the fire department directly, without waiting for an outside monitoring service or on-site staff to relay the alert. An auxiliary fire alarm system is designed to provide that direct link to fire department dispatch. When it trips, the department receives the alarm straight away.

Other options either stay on-site only (local), or send the signal to a monitoring service that then contacts the fire department (central station), or are monitored by the building’s own private staff or a private company (proprietary). These paths involve an intermediary, so they’re not direct to the fire department like the auxiliary system.