Deck General · Fire Theory & Classes
Which class of fire involves combustible metals such as magnesium or titanium?
- AClass A
- BClass B
- CClass C
- DClass D✓ Correct
Explanation
Class D fires involve combustible metals — magnesium, titanium, zirconium, sodium, potassium, and similar. These fires burn at extremely high temperatures and react violently with water and many standard extinguishing agents. Only special dry powder agents (such as Met-L-X or sodium chloride-based powder) designed for Class D fires should be used.
Authority: Firefighting (USCG deck topic)
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