GSEC · Question #175
Which of the following are used to suppress gasoline and oil fires? Each correct answer represents a complete solution. Choose three.
The correct answer is A. Halon B. CO2 C. Soda acid. Gasoline and oil fires are Class B fires and require suppression agents that either smother, displace oxygen, or interrupt combustion - water must never be used as it spreads flammable liquids.
Question
Which of the following are used to suppress gasoline and oil fires? Each correct answer represents a complete solution. Choose three.
Options
- AHalon
- BCO2
- CSoda acid
- DWater
How the community answered
(31 responses)- A71% (22)
- D29% (9)
Why each option
Gasoline and oil fires are Class B fires and require suppression agents that either smother, displace oxygen, or interrupt combustion - water must never be used as it spreads flammable liquids.
Halon extinguishes Class B fires by chemically interrupting the combustion chain reaction without leaving residue, making it effective on flammable liquid fires.
CO2 suppresses fire by displacing oxygen in the immediate area of the flame, suffocating it without leaving residue and without reacting with or spreading flammable liquids.
Soda acid extinguishers generate CO2 through a chemical reaction between sodium bicarbonate and sulfuric acid, and this CO2 production contributes to suppressing the fire in some classification frameworks.
Water is inappropriate for gasoline and oil fires because it does not mix with these substances and causes the burning liquid to scatter, rapidly spreading the fire and potentially causing explosive spattering.
Concept tested: Class B fire suppression agent selection
Source: https://www.nfpa.org/codes-and-standards/nfpa-10-standard-for-portable-fire-extinguishers
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