Fire and rollover fires on overhead, what nozzle technique is used?

Fire and rollover fires on overhead, what nozzle technique is used?

• A. Use straight stream
• B. Use short medium angle burst
• C. Use fog pattern
• D. Use long range burst

Answer: (B)

When you’re dealing with an overhead fire and the risk of rollover, the goal is to rapidly cool the hot ceiling layer where the flame­ front is feeding off the fuel-air mixture. The best nozzle technique is to deliver short, medium-angle bursts toward the ceiling. These brief hits quickly absorb heat, creating a cooling effect in the upper gas layer and helping to prevent the rollover from spreading. The bursts also minimize steam production and reduce the chance of pushing the fire or losing water efficiency in a confined overhead environment. Using longer, continuous streams or aiming straight up can drive heat and flames in undesired directions, while a pure fog pattern without decisive bursts may not deliver water to the critical ceiling area fast enough.

When you’re dealing with an overhead fire and the risk of rollover, the goal is to rapidly cool the hot ceiling layer where the flame­ front is feeding off the fuel-air mixture. The best nozzle technique is to deliver short, medium-angle bursts toward the ceiling. These brief hits quickly absorb heat, creating a cooling effect in the upper gas layer and helping to prevent the rollover from spreading. The bursts also minimize steam production and reduce the chance of pushing the fire or losing water efficiency in a confined overhead environment. Using longer, continuous streams or aiming straight up can drive heat and flames in undesired directions, while a pure fog pattern without decisive bursts may not deliver water to the critical ceiling area fast enough.