Commercial drivers must accurately recognize fire classifications to select the appropriate extinguishing agent and technique during an on-road emergency. Which fire classification correctly corresponds to each fuel source and material type? Match each fire classification on the left with its corresponding fuel source on the right.
- Class A FireOrdinary solid combustibles including wood cargo pallets, cardboard packaging, paper, textiles, and rubber tires
- Class B FireFlammable liquids and gases including diesel fuel, gasoline, engine lubricating oil, and axle grease
- Class C FireEnergized electrical equipment, damaged wiring harnesses, instrument circuitry, and starter relays
- Class D FireCombustible metals such as magnesium or titanium found in specialized structural components and wheels
Answer
Class A matches ordinary solid combustibles (wood, cardboard, tires); Class B matches flammable liquids and gases (diesel, oil, grease); Class C matches energized electrical wiring and circuitry; Class D matches combustible metals (magnesium, titanium).
Each fire classification is established according to the state and chemical nature of the burning fuel: Class A encompasses solid combustible materials (wood, cardboard, textiles, and rubber tires); Class B covers flammable liquids and gases (diesel fuel, gasoline, motor oils, and grease); Class C designates fires involving energized electrical equipment and wiring harnesses; and Class D is reserved for combustible metal components such as magnesium.
Step-by-Step Solution
Key Concept
Commercial motor vehicle fire classifications and corresponding fuel materials
Estimated Time:1m 15s