🔍 Key Concepts

• Halon properties as a gaseous extinguishing agent • Differences between effectiveness, residue, and corrosion characteristics • Health and safety limits for exposure/toxicity of Halon

💭 Think About

• For each choice, ask yourself: Is this a known advantage or limitation of Halon systems on vessels? • Think about why Halon required strict handling and phase-out regulations—what property drove those rules? • Compare Halon with CO₂ in terms of how quickly and cleanly it can put out an electrical or machinery space fire.

✅ Before You Answer

• Verify which properties of Halon are commonly cited as advantages: clean agent, noncorrosive, effective on electrical fires. • Consider whether Halon has any toxicity concerns, especially in enclosed spaces. • Confirm whether "always" in one of the choices might make that statement too absolute given real-world safety limits.