FE Extinguisher Components & Operation Flashcards

What is the primary purpose of the pull pin on a fire extinguisher?

Answer: To prevent accidental discharge by blocking the handle

The pull pin (safety pin) blocks the operating lever to prevent accidental discharge during handling and storage.

What does the Schrader valve on a stored-pressure extinguisher do?

Answer: Provides a fill port for both agent and expellant gas

The Schrader valve is a fill port used to charge (pressurize) stored-pressure extinguishers with both agent and propellant gas.

What component of a dry chemical extinguisher prevents the powder from caking and ensures it discharges properly?

Answer: Anti-caking agitator bead

Agitator beads inside the cylinder keep dry chemical powder loose and prevent caking so it flows freely during discharge.

Which extinguisher component delivers the agent from the cylinder to the fire?

Answer: Siphon (dip) tube

The siphon tube (dip tube) extends to the bottom of the cylinder, allowing pressurized gas to push the liquid or powder agent up and out through the valve.

What is the function of the discharge nozzle horn on a CO2 extinguisher?

Answer: Directs the CO2 stream and reduces static discharge risk

The CO2 horn directs the gas stream at the fire and is made of non-conductive material to reduce the risk of static discharge.

What does a broken or missing tamper seal on a fire extinguisher indicate?

Answer: The extinguisher may have been used or tampered with and requires inspection

A broken tamper seal indicates the pull pin may have been removed, suggesting possible use or tampering that requires immediate inspection.