Wildland Firefighting Practice Exam

Question: 1 / 400

Fires spreading upslope or with the wind assume what shape?

Tapered

Wedge

Fires that are spreading upslope or being influenced by the wind typically take on a wedge shape. This occurs because the fire spreads more rapidly in the direction of the slope or downwind, creating a leading edge that is broader than the rear of the fire. The shape resembles a wedge being pushed through fuel, with the base of the wedge representing the advancing front of the fire while the sides taper back towards the origin.

This wedge formation is critical for understanding fire behavior, as it indicates how the fire might impact the landscape and how firefighting efforts can be effectively directed. This shape also correlates with the dynamics of heat and wind, contributing to the fire's growth pattern and making it essential for firefighters to predict and strategize their containment efforts accordingly.

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