For protected hazards with conveyors moving flammable or combustible materials, what action must occur when the extinguishing system operates?

• A. Automatically shut off upon operation of extinguishing system
• B. Manually shut off
• C. Continue running
• D. Alarm only

Answer: (A)

When a fire suppression system designed for protected hazards with conveyors that carry flammable materials operates, the conveyor must stop automatically. This interlock is essential because continuing to move material into the fire area would feed the flames, spread burning debris, and undermine the suppression effort. Stopping the conveyor removes the fuel source from the fire and helps the extinguishing agent reach the area effectively. Relying on someone to shut it down or simply sounding an alarm does not provide the rapid, guaranteed action needed in a fire situation, so automatic shutdown is the correct approach.