What rating must the extinguisher on explosive laden vehicles have?

• A. 1A:10BC
• B. 3A:40BC
• C. 4A:60BC
• D. 2A:10BC

Answer: (D)

Extinguisher ratings show what kinds of fires it can fight and how large a fire it’s designed to handle. For explosive-laden vehicles you want a unit that can handle both ordinary combustibles and fires from flammable liquids or electrical sources. The minimum you need is a rating of 2A:10BC. The 2A indicates capacity against ordinary combustibles (like fabric, wood, paper), while BC means it’s suitable for flammable liquids (class B) and electrical fires (class C). This combination covers typical vehicle fires, including fuel or solvent fires and electrical faults, plus any interior materials. The other options either lower the capacity for ordinary combustibles or exceed the minimum without necessity.