During fire prevention measures, how long does the water mist protection last in the FMMR at the specified gpm rate?

The water mist protection in the Fire Main and Management System (FMMR) is designed to provide a specific duration of coverage based on the water flow rate specified in gallons per minute (gpm). The correct answer reflects an optimal balance between effective cooling and coverage time, ensuring that fire prevention measures can adequately protect a designated area.

In the case of 23 minutes at a flow rate of 91.2 gpm, this duration is significant for fire prevention because it combines a relatively efficient gpm with a respectable time frame for maintaining water mist coverage. This setup allows the system to effectively manage the thermal energy from a potential fire, helping to both suppress flames and cool down surrounding materials, which is critical in preventing the spread of fire.

This configuration indicates a well-engineered fire protection system that maximizes the use of water resources while providing sufficient time for the protection measure to be effective. Therefore, the specific choice of 23 minutes at 91.2 gpm is justifiable given its effectiveness in fire prevention measures.