JJ Keller Entry Level Driver Training for CDL (Commercial Driver’s License) Practice Test

Question: 1 / 400

If flammable liquids are on fire, which class of fire extinguisher is needed?

Class A

Class B

Flammable liquids, such as gasoline, oil, and solvents, require a Class B fire extinguisher. This class of extinguisher is specifically designed to combat fires caused by flammable liquids and gases. The agents in Class B extinguishers, typically foam, dry chemical, or carbon dioxide, work by smothering the flames and cutting off the oxygen supply, effectively suppressing the fire.

Understanding the classification of fires is essential for safety, as using the wrong type of extinguisher can exacerbate the fire or create hazardous situations. Class A extinguishers are meant for ordinary combustibles like wood or paper, Class C extinguishers are for electrical fires, and Class D extinguishers are for combustible metals. Using an extinguisher designed for the wrong class of fire can lead to ineffective fire suppression and increased danger.

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Class C

Class D

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