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

Chemical storage rooms

Answer

Electrical panel rooms

Answer

Combustible metal shavings

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 extinguisher weighs 20 pounds

Answer

The extinguisher has a 20-second discharge time

Answer

The extinguisher holds 20 gallons of agent

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

Multipurpose dry chemical (ABC)

Answer

Water mist

Answer

Foam (AFFF)

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

The pressure gauge needle is in the green zone

Answer

The pull pin is secured with a tamper seal

Answer

The last inspection tag is from the previous month

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

Class A only, because roofing material is combustible

Answer

Class D only, because metal substrate is involved

Answer

Class K, because asphalt is a cooking medium

Question 6

What is the maximum travel distance to a fire extinguisher from any point in a hot work area, per NFPA 51B?

Accepted Answer

30 feet

Answer

10 feet

Answer

50 feet

Answer

75 feet