What stage of fire development occurs when all the combustible materials in a compartment are burning?

What stage of fire development occurs when all the combustible materials in a compartment are burning?

• A. Incipient
• B. Growth
• C. Fully Developed
• D. Decay

Answer: (C)

Fire development in a compartment moves from ignition to growth to fully developed to decay. The stage in which all the combustible materials in the compartment are burning is the fully developed stage. At this point the fire has spread to most or all available fuels inside the space, heat release is at its peak, and flames fill the area, creating extreme temperatures and lethal conditions. Earlier stages involve ignition with only some fuels burning and flames increasing, while the final stage occurs as fuels are exhausted and the fire wanes.

Fire development in a compartment moves from ignition to growth to fully developed to decay. The stage in which all the combustible materials in the compartment are burning is the fully developed stage. At this point the fire has spread to most or all available fuels inside the space, heat release is at its peak, and flames fill the area, creating extreme temperatures and lethal conditions. Earlier stages involve ignition with only some fuels burning and flames increasing, while the final stage occurs as fuels are exhausted and the fire wanes.