Safety, Fire & Survival · Firefighting
A dry-chemical (PKP) portable extinguisher is rated for which fires?
- AClass A only
- BClass D combustible metals only
- CIt cannot be used on any shipboard fire
- DClass B and Class C fires✓ Correct
Explanation
Dry-chemical (potassium bicarbonate, 'PKP') extinguishers interrupt the combustion chain reaction and are rated for Class B (flammable liquid) and Class C (electrical) fires. They leave a residue and have no cooling effect, so a Class A fire can reflash.
Authority: 46 CFR 25.30; STCW A-VI/1
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