F01 Fire Classification & Extinguishers 2

Question 1

Which class of fire involves flammable liquids such as gasoline, oil, or paint thinner?

Accepted Answer

Class B

Answer

Class B fires involve flammable and combustible liquids, including gasoline, oil, grease, tar, oil-based paint, lacquer, and flammable gases.

Question 2

A CO2 (carbon dioxide) fire extinguisher is most effective on which types of fires?

Accepted Answer

Class B and C fires (liquids and electrical)

Answer

CO2 extinguishers work by displacing oxygen and are rated for Class B (flammable liquids) and Class C (electrical) fires without leaving residue.

Question 3

What does the letter 'A' rating on a fire extinguisher indicate?

Accepted Answer

The extinguisher is effective on ordinary combustibles

Answer

The 'A' classification on a fire extinguisher means it is rated for Class A fires involving ordinary combustibles such as wood, paper, cloth, and plastics.

Question 4

Which extinguisher type should NEVER be used on electrical fires?

Accepted Answer

Water (stored pressure)

Answer

Water is electrically conductive and must never be used on live electrical equipment. It can cause electrocution and spread the fire.

Question 5

How should a fireguard hold a portable fire extinguisher when using the PASS technique?

Accepted Answer

Aim at the base of the fire and use a side-to-side sweeping motion

Answer

PASS stands for Pull, Aim, Squeeze, Sweep. The nozzle should be aimed at the BASE of the fire and swept side to side to knock down and extinguish flames at their fuel source.

(F01) NYC Fireguard F01 Certification Practice Test

(F01) NYC Fireguard F01 Certification Practice Test

F01 Fire Classification & Extinguishers 2