FE FE Extinguisher Components & Operation 1 — Questions and Answers
Question 1: What is the primary purpose of the pull pin on a fire extinguisher?
- To seal the discharge nozzle
- To prevent accidental discharge by blocking the handle (Correct answer)
- To indicate service history
- To control discharge rate
Correct 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.
Question 2: What does the Schrader valve on a stored-pressure extinguisher do?
- Controls discharge rate
- Provides a fill port for both agent and expellant gas (Correct answer)
- Indicates remaining pressure
- Connects the siphon tube to the nozzle
Correct 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.
Question 3: What component of a dry chemical extinguisher prevents the powder from caking and ensures it discharges properly?
- Anti-caking agitator bead (Correct answer)
- Siphon tube screen
- Pressure gauge bourdon tube
- Discharge valve O-ring
Correct answer: Anti-caking agitator bead
Agitator beads inside the cylinder keep dry chemical powder loose and prevent caking so it flows freely during discharge.
Question 4: Which extinguisher component delivers the agent from the cylinder to the fire?
- Carrying handle
- Siphon (dip) tube (Correct answer)
- Pressure indicator
- Safety pin
Correct 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.
Question 5: What is the function of the discharge nozzle horn on a CO2 extinguisher?
- Indicates pressure level
- Directs the CO2 stream and reduces static discharge risk (Correct answer)
- Prevents freezing of the valve
- Acts as a carrying handle
Correct 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.
Question 6: What does a broken or missing tamper seal on a fire extinguisher indicate?
- The extinguisher is past its hydrostatic test date
- The extinguisher may have been used or tampered with and requires inspection (Correct answer)
- The extinguisher is overcharged
- Nothing — tamper seals are optional
Correct 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.
FE FE Extinguisher Components & Operation 1
What is the primary purpose of the pull pin on a fire extinguisher?