FE Fire Extinguisher Types & Classification 2

Question 1

Which extinguisher class is specifically designed for fires involving energized electrical equipment?

Accepted Answer

Class C

Answer

Class C extinguishers are rated for energized electrical equipment fires and use non-conductive agents.

Question 2

A halogenated (clean agent) extinguisher is MOST appropriate for which environment?

Accepted Answer

Server room with sensitive electronics

Answer

Clean agents leave no residue and are safe for sensitive electronics, making them ideal for server rooms.

Question 3

What does the numerical rating preceding a Class A designation (e.g., 2-A) indicate?

Accepted Answer

The relative firefighting capacity compared to water

Answer

The number before Class A represents the relative firefighting capacity, with each unit roughly equivalent to 1.25 gallons of water.

Question 4

Which type of extinguisher agent is classified as a 'wet chemical' and is primarily used on Class K fires?

Accepted Answer

Potassium acetate solution

Answer

Potassium acetate (and similar potassium-based solutions) form a wet chemical agent that saponifies cooking oils for Class K fires.

Question 5

A stored-pressure dry chemical extinguisher differs from a cartridge-operated unit primarily in that it:

Accepted Answer

Contains both agent and expellant gas in a single cylinder

Answer

In stored-pressure units, the propellant gas and dry chemical agent share the same cylinder, unlike cartridge-operated units.

(FE) Certified Portable Fire Extinguisher Technician Practice Test