What are three of the six types of fire protective signaling systems?

The choice of local, central station, and proprietary as types of fire protective signaling systems is accurate and reflects their distinct functions and applications within fire alarm systems.

A local signaling system typically alerts occupants of a building to the presence of a fire through alarms that are directly connected to the detectors within that same structure. This makes it crucial for immediate evacuation and response.

A central station system, on the other hand, is monitored off-site by a central station. When an alarm is triggered, it sends a signal to emergency responders. This system is often preferred for its ability to provide a quicker response to fire incidents, particularly in commercial settings.

Proprietary systems are designed for specific businesses or facilities, often tailored to the unique needs of the organization. These systems can be beneficial for larger or complex environments where standard systems may not be sufficient.

In contrast, the other options do not accurately categorize types of fire protective signaling systems. Manual, automatic, and digital refer to characteristics of signaling methods rather than distinct system types. Mechanical, chemical, and electrical pertain more to the components or types of technologies used in fire systems rather than classification of signaling types. Lastly, permanent, temporary, and portable describe physical arrangements or characteristics of equipment rather than their signaling capabilities in fire