🔍 Key Concepts

• Identify visual clues that distinguish dry chemical, CO₂, Halon 1301, and light water (foam/water) systems • Think about which agents are normally stored in large, single tanks measured in pounds and delivered through a hose reel for local application • Note how propellant cylinders are arranged when a chemical powder must be pushed out of a tank

💭 Think About

• Look closely at the big red 500 LB tank: does that size and shape look more like a powder tank, a gas cylinder bank, or a water/foam tank? • Study the two long white cylinders and gauges at the base – what role would these play if the main agent were a powder versus a gas versus a liquid? • Which of the listed agents is most commonly used in a large, wheeled or fixed hose reel system for flammable‑liquid fires on decks or near machinery?

✅ Before You Answer

• Check which agents (Halon 1301, CO₂, dry chemical, light water) are usually used in fixed flooding systems rather than hose‑reel systems • Verify which extinguishing agent normally requires separate high‑pressure gas cylinders to expel the agent from a storage tank • Confirm which type of system typically has a large tank labeled in pounds of powder feeding a flexible hose for hand‑aimed discharge