Multiple choice

Fire extinguishers release which of the following gases?

  1. Hydrogen

  2. Nitrogen

  3. Carbon dioxide

  4. Carbon monoxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fire extinguishers commonly release carbon dioxide, which smothers fires by displacing oxygen and also has a cooling effect. CO2 extinguishers are particularly useful for electrical and flammable liquid fires. Hydrogen is flammable, nitrogen is used in some specialized systems, and carbon monoxide is toxic.

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