A _____ holds both the extinguishing agent and the expeller gas under pressure in the body of the extinguisher.

A _____ holds both the extinguishing agent and the expeller gas under pressure in the body of the extinguisher.

• A. Stored-pressure fire extinguisher
• B. Cartridge-operated extinguisher
• C. Dry chemical extinguisher
• D. Wet-chemical extinguisher

Answer: (A)

The main idea is how the extinguisher is pressurized to release its contents. In a stored-pressure extinguisher, the extinguishing agent and the expellant gas are already in the same vessel under pressure. When you operate the handle, the valve vent pushes the agent out because the gas is doing the pushing, all from within the body of the extinguisher. That setup matches the description precisely. If you compare, a cartridge-operated extinguisher uses a separate gas cartridge that must be ruptured to release the gas and pressurize the unit, so the gas isn’t stored under pressure in the body together with the agent from the start. The terms dry chemical or wet chemical describe the agent material itself, not how the unit is pressurized, so they don’t define this storage arrangement.

The main idea is how the extinguisher is pressurized to release its contents. In a stored-pressure extinguisher, the extinguishing agent and the expellant gas are already in the same vessel under pressure. When you operate the handle, the valve vent pushes the agent out because the gas is doing the pushing, all from within the body of the extinguisher. That setup matches the description precisely.

If you compare, a cartridge-operated extinguisher uses a separate gas cartridge that must be ruptured to release the gas and pressurize the unit, so the gas isn’t stored under pressure in the body together with the agent from the start. The terms dry chemical or wet chemical describe the agent material itself, not how the unit is pressurized, so they don’t define this storage arrangement.