For a carburetor or intake fire, which extinguishing agent is most satisfactory?

For a carburetor or intake fire, which extinguishing agent is most satisfactory?

• A. Dry chemical
• B. Fine water mist
• C. Carbon dioxide
• D. Foam

Answer: (C)

When a fire starts in a carburetor or intake, the agent that best stops it quickly is carbon dioxide. The flame in that area is effectively smothered because CO2 is denser than air and blankets the fire, reducing the amount of oxygen it can draw on. It also cools the immediate surroundings and, importantly, leaves no residue that could foul delicate engine components or contaminate fuel passages. Other agents have drawbacks in this specific situation: dry chemical powder can leave a abrasive residue that may clog narrow passages or interfere with fuel-system parts; a fine water spray might introduce water into the intake, with cooling but potential for backfire or unwanted interactions with fuel, and foam can introduce residues and may not be ideal in a confined engine space. Carbon dioxide provides rapid, clean extinguishing without leaving debris behind, making it the most satisfactory choice for a carburetor or intake fire.

When a fire starts in a carburetor or intake, the agent that best stops it quickly is carbon dioxide. The flame in that area is effectively smothered because CO2 is denser than air and blankets the fire, reducing the amount of oxygen it can draw on. It also cools the immediate surroundings and, importantly, leaves no residue that could foul delicate engine components or contaminate fuel passages. Other agents have drawbacks in this specific situation: dry chemical powder can leave a abrasive residue that may clog narrow passages or interfere with fuel-system parts; a fine water spray might introduce water into the intake, with cooling but potential for backfire or unwanted interactions with fuel, and foam can introduce residues and may not be ideal in a confined engine space. Carbon dioxide provides rapid, clean extinguishing without leaving debris behind, making it the most satisfactory choice for a carburetor or intake fire.