F01 Fire Classification & Extinguishers 3

Question 1

Class K fire extinguishers are specifically designed for which type of fire?

Accepted Answer

Cooking oils and fats in commercial kitchens

Answer

Class K fires involve cooking oils and animal or vegetable fats at high temperatures, typically found in commercial kitchen cooking equipment. Class K extinguishers use a wet chemical agent.

Question 2

What does a '20-B' rating on a fire extinguisher mean?

Accepted Answer

The extinguisher can cover 20 square feet of burning liquid

Answer

The numerical rating before 'B' indicates the approximate square footage of a flammable liquid fire that a trained operator can extinguish. A 20-B rating means approximately 20 square feet.

Question 3

Which type of fire extinguisher agent leaves no residue and is safe for use in areas with sensitive electronic equipment?

Accepted Answer

Carbon dioxide (CO2)

Answer

CO2 extinguishers discharge a clean gas that leaves no residue, making them ideal for electrical panels and sensitive equipment. Dry chemical leaves powder residue that can damage electronics.

Question 4

When inspecting a portable fire extinguisher before a hot work shift, which condition would require the extinguisher to be immediately removed from service?

Accepted Answer

The pressure gauge needle is in the red (undercharged) zone

Answer

A pressure gauge in the red zone indicates the extinguisher is undercharged and may not function properly. It must be removed from service and recharged or replaced immediately.

Question 5

During torch operations on a roof, which extinguisher class is MOST critical to have immediately accessible?

Accepted Answer

Class B:C rated, because propane fuel and potential electrical hazards exist

Answer

Torch operations use propane (Class B flammable gas) and may have electrical equipment nearby (Class C). A B:C or A:B:C rated extinguisher covers both hazards.

(F01) NYC Fireguard F01 Certification Practice Test

(F01) NYC Fireguard F01 Certification Practice Test

F01 Fire Classification & Extinguishers 3