🔍 Key Concepts

• Halon fire extinguishing agent properties (how it behaves in normal conditions vs. in a fire) • Difference between simple irritation (eyes/skin) and more serious toxic byproducts • What happens to many extinguishing agents when they are exposed to high heat or open flame

💭 Think About

• Ask yourself which option describes something that is truly unique or distinctive to Halon compared with many other agents. • Consider what happens to a chemical extinguishing agent when it passes through a very hot flame front—does its composition stay the same or can it break down? • Think about the difference between a gas simply being heavier/lighter than air and a gas that can chemically change into something more dangerous.

✅ Before You Answer

• Verify which choice mentions chemical decomposition or byproducts related to heat/flame, not just physical properties like being lighter than air. • Check whether eye or skin irritation alone would be described as the principal personnel hazard for a gas used in occupied spaces. • Confirm which option reflects a hazard that would concern you after discharging Halon directly into a fire, not just when it’s sitting in the cylinder.