The stage where all combustibles in the compartment are involved is which?

The stage where all combustibles in the compartment are involved is which?

• A. Rollover
• B. Growth
• C. Flashover
• D. Fully-developed

Answer: (D)

The stage where every combustible in the compartment is burning is the fully-developed stage. At this point the fire has spread to all fuels present, heat release is at its peak, and flames fill the room with extremely high temperatures. Life hazards and structural danger are at their maximum, making interior operations very risky. This stage is different from growth, where the fire is still spreading to new fuels and not all contents are involved yet, and from rollover, which is flames rolling across the ceiling, or flashover, which is the rapid ignition of most or all combustibles in the space and often marks the transition into fully-developed conditions. The key idea is that all combustibles in the compartment are actively burning.

The stage where every combustible in the compartment is burning is the fully-developed stage. At this point the fire has spread to all fuels present, heat release is at its peak, and flames fill the room with extremely high temperatures. Life hazards and structural danger are at their maximum, making interior operations very risky. This stage is different from growth, where the fire is still spreading to new fuels and not all contents are involved yet, and from rollover, which is flames rolling across the ceiling, or flashover, which is the rapid ignition of most or all combustibles in the space and often marks the transition into fully-developed conditions. The key idea is that all combustibles in the compartment are actively burning.