🔍 Key Concepts

• Fixed fire-extinguishing systems on vessels that protect machinery spaces and cargo areas • Characteristics and normal physical state of Halon 1301 when it is discharged • Difference between how dry chemicals, gases, and solids behave when released into a space

💭 Think About

• Think about how Halon 1301 is able to quickly fill an enclosed space and reach all parts of the compartment, including overhead and behind equipment. • Which of the options would best allow the extinguishing agent to stay suspended in the air long enough to interrupt the chemical chain reaction of combustion? • Consider what form other common agents (like dry chemical, foam, or CO₂) take, and which of those Halon 1301 is most similar to in operation.

✅ Before You Answer

• Make sure you know the normal discharge form of Halon 1301 from fixed systems, not how it is stored in the cylinder. • Verify which choices describe solid forms (powder, pellet, slag) versus a vapor or invisible agent. • Confirm which type of agent can effectively flood a space without leaving a residue on machinery and electronics.