Question 815Deck Safety70% to pass
CO2 mainly extinguishes a fire by which of the following?
AI Explanation
The correct answer is C) smothering.
Carbon dioxide (CO2) primarily extinguishes a fire by smothering or displacing the oxygen in the air around the fire. When CO2 is released, it forms a blanket over the fire, cutting off the oxygen supply and preventing combustion from continuing. This smothering effect is the main mechanism by which CO2 is effective as a fire extinguishing agent.
The other answer choices are incorrect because while CO2 may have some chemical action and cooling effects, these are secondary to its primary function of smothering the fire by oxygen displacement.
Related Questions
#813 After using a CO2 portable extinguisher, it should be _______________.#814 In weighing CO2 cylinders, they must be recharged if weight loss exceeds _______________.#816 A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be _______________.#817 A type B-III CO2 extinguisher has a rated capacity of _______________.#818 Which extinguishing agent is most likely to allow reflash as a result of not cooling the fuel below its ignition temperature?