Q. Which type of fire extinguisher is used for petroleum fire?
Answer: Foam type
Notes: Foam type fire extinguishers are suitable for fires that involve flammable or combustible liquids, including petrol, grease, and oil. They are applied to fuel fires as either an aspirated (mixed & expanded with air in a branch pipe) or nonaspirated form to form non-combustible a frothy blanket or seal over the fuel, preventing oxygen reaching it. Powder types are useful for combustible metals.

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Question Number: 65 in Chemistry-15-Hydrocarbons & Fuels in above course in App.