The term for a crown fire that operates independently of direct crown-to-crown spread is _____.

The term for a crown fire that operates independently of direct crown-to-crown spread is _____.

• A. Secondary crown
• B. Independent crown
• C. Isolated crown
• D. Primary crown

Answer: (B)

Crown fires can move through the canopy either by direct flame contact from crown to crown or by spreading without needing that direct contact. When a crown fire continues to spread without relying on direct crown-to-crown flame transfer, it’s described as an independent crown fire. In this mode, the fire can advance through radiant heat, convection, or embers igniting crowns ahead, so the canopy keeps spreading even where crowns aren’t touching flames. The other terms listed aren’t standard ways to describe this behavior, so they don’t fit as well.

Crown fires can move through the canopy either by direct flame contact from crown to crown or by spreading without needing that direct contact. When a crown fire continues to spread without relying on direct crown-to-crown flame transfer, it’s described as an independent crown fire. In this mode, the fire can advance through radiant heat, convection, or embers igniting crowns ahead, so the canopy keeps spreading even where crowns aren’t touching flames. The other terms listed aren’t standard ways to describe this behavior, so they don’t fit as well.