Deck General · Fire Theory & Classes
A fire in the engine room involving spilled diesel fuel is classified as which class?
- AClass A
- BClass B✓ Correct
- CClass C
- DClass D
Explanation
Class B fires involve flammable and combustible liquids (fuels, oils, greases, paints, solvents) and flammable gases. Diesel fuel is a combustible liquid; gasoline and oil are classic Class B fuels. The primary extinguishing method is smothering or flame inhibition — NOT a water jet, which can spread burning liquid.
Authority: Firefighting (USCG deck topic)
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