FE FE Extinguisher Components & Operation 2

Question 1

Which type of fire extinguisher uses a separate cartridge of CO2 or nitrogen to expel the agent?

Accepted Answer

Cartridge-operated type

Answer

Cartridge-operated extinguishers have a separate gas cartridge that is punctured upon operation to pressurize the agent in the main cylinder.

Question 2

What does the pressure gauge on a stored-pressure extinguisher measure?

Accepted Answer

Internal pressure of the combined agent and propellant gas

Answer

The pressure gauge measures the internal pressure of the stored-pressure extinguisher, indicating whether it is properly charged.

Question 3

The PASS acronym used to operate a fire extinguisher stands for:

Accepted Answer

Pull, Aim, Squeeze, Sweep

Answer

PASS stands for Pull the pin, Aim at the base of the fire, Squeeze the handle, and Sweep side to side.

Question 4

Why should the nozzle of a CO2 extinguisher never be touched during or immediately after discharge?

Accepted Answer

The nozzle can reach extremely cold temperatures causing frostbite

Answer

CO2 expansion during discharge causes the horn and nozzle to drop to very low temperatures, posing a serious frostbite risk.

Question 5

What is the purpose of the O-ring or gasket in the valve assembly of a fire extinguisher?

Accepted Answer

To create an airtight seal preventing leakage of agent or propellant

Answer

O-rings and gaskets create pressure-tight seals in the valve assembly to prevent agent or gas from leaking during storage.

(FE) Certified Portable Fire Extinguisher Technician Practice Test