🔍 Key Concepts

• Class C (electrical) fires and which extinguishing agents are safe to use on energized equipment • Why water-based or conductive agents can be dangerous on live electrical circuits • Typical uses and characteristics of carbon dioxide (CO₂) and dry chemical extinguishers

💭 Think About

• First, decide which extinguishers are nonconductive and do not leave a wet or conductive residue on electrical equipment. • Eliminate any extinguisher types that are primarily water-based or create a strong risk of shock when used on live circuits. • Consider which extinguisher types are commonly found near electrical panels, radios, and control equipment on vessels.

✅ Before You Answer

• Verify which extinguisher classes are specifically rated for Class C fires (electrical) in standard maritime fire-fighting guidance. • Check whether foam (stored pressure) or soda-acid have a substantial water content that could conduct electricity. • Confirm that the remaining agents are known to be nonconductive and safe around energized electrical equipment.