🔍 Key Concepts

• Fire classification system used on ships (Classes A, B, C, D) • What type of material aluminum powder is (ordinary solid, flammable liquid, electrical, or combustible metal) • Which class of fire uses special extinguishing agents like dry powder rather than water or foam

💭 Think About

• First, decide what category aluminum powder fits into: is it more like wood/paper, fuel oil, energized wiring, or a metal? • Think about what can happen if you put water on burning aluminum or other reactive metals—does that make it safer or more dangerous? • Recall which class of fire is specifically associated with metal shavings, powders, and chips such as magnesium or sodium.

✅ Before You Answer

• Match each choice (A–D) to its correct definition (ordinary combustibles, flammable liquids, electrical equipment, combustible metals). • Verify which class is normally fought with special dry powder extinguishers and NOT with water, foam, or CO₂. • Confirm that aluminum in finely divided form (powder, shavings) is treated as a combustible metal in fire safety guidance.