What is the wheel fire approach and extinguishment method?

• A. Wait for maintenance and do not intervene.
• B. Approach from the side and use a straight stream only.
• C. Treat as combustible metal; avoid side/rim hazard, approach 45° front/rear, use water from distance initially, and Class D powder if needed.
• D. Apply foam directly at the wheel from short range with no water.

Answer: (C)

Wheel fires involve combustible metal components, so the approach and extinguishment method must address both cooling and metal combustion hazards. Treating it as a metal fire means you expect high heat, potential rim hazards, and the need for a specific extinguishing agent if ordinary methods aren’t enough. Approaching from 45 degrees at the front or rear keeps you out of the most vulnerable line with the rim and gives you a safer angle to apply extinguishing agents while avoiding direct exposure to possible metal spalling. Starting with water from a distance cools the wheel and brake parts, absorbing heat and reducing the chance of reignition before you try to smother the fire. If the metal continues to burn, using a Class D powder provides a dedicated extinguishing medium for combustible metals, which water alone may not effectively arrest. Other approaches fail to prioritize cooling, ignore the unique hazards of the metal components, or rely on agents inappropriate for metal fires, making them less effective for this scenario.