Which statement best describes a stored-pressure fire extinguisher?

Which statement best describes a stored-pressure fire extinguisher?

• A. It stores the extinguishing agent and expellent gas under pressure in the body.
• B. It uses disposable canisters without gas.
• C. It relies on gravity feed without any pressurized gas.
• D. It uses a separate cartridge of gas that is not stored in the extinguisher.

Answer: (A)

Stored-pressure extinguishers keep the extinguishing agent and the propellant gas under pressure inside the same cylinder. When you open the valve, the stored pressurized gas automatically pushes the agent out through the nozzle, delivering it quickly. There isn’t a separate gas cartridge inside the unit, which is what distinguishes stored-pressure designs from cartridge-operated types. Gravity-feed or non-pressurized, disposable canister designs don’t fit this description either, since they don’t rely on an internal pressurized gas to expel the agent.

Stored-pressure extinguishers keep the extinguishing agent and the propellant gas under pressure inside the same cylinder. When you open the valve, the stored pressurized gas automatically pushes the agent out through the nozzle, delivering it quickly. There isn’t a separate gas cartridge inside the unit, which is what distinguishes stored-pressure designs from cartridge-operated types. Gravity-feed or non-pressurized, disposable canister designs don’t fit this description either, since they don’t rely on an internal pressurized gas to expel the agent.