Which of the following is NOT a type of fire behavior?

Flash combustion is not a recognized type of fire behavior in the context typically discussed in fire science. The term "flash" in fire dynamics usually relates to flashover, which is a rapid transition of all combustible material in a room reaching ignition temperature, but not specifically to a type of combustion or fire behavior on its own.

Flaming combustion involves the rapid oxidation of flammable materials, producing flames and heat, and is a well-defined type of fire behavior. Spontaneous combustion refers to a process where materials ignite without an external ignition source, often due to heat buildup from chemical reactions. Smoldering combustion, on the other hand, is a slower type of combustion that does not produce flames, characterized by glowing materials that can still pose a fire hazard.

These distinctions are fundamental in understanding fire dynamics and behaviors as they relate to fire prevention, control, and safety measures.