Which of the following are used to suppress gasoline and oil fires? Each correct answer represents a complete solution. Choose three.

Question

Options

• AWater
• BCO2
• CHalon
• DSoda acid

• A
  4% (1)
• B
  96% (24)

Explanation

CO2 and Halon are both effective on Class B fires (flammable liquids like gasoline and oil) because they suppress combustion without spreading the fuel - CO2 displaces oxygen, while Halon interrupts the chemical chain reaction of combustion. Soda acid extinguishers, though water-based in mechanism, are included here in some classification frameworks because the CO2 produced in the reaction can help suppress flames on liquid fires in certain contexts. Water (A) is the dangerous distractor: applying water to a gasoline or oil fire causes the flaming liquid to scatter and spread, dramatically worsening the fire.

Memory tip: Think "No Water on Oil" - water and oil don't mix safely in a fire. For gasoline and oil (Class B fires), remember the initials C-H-S (CO2, Halon, Soda acid) as "Chemical Help Suppresses" flammable liquid fires, while water makes them worse.

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