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You need to use a Class B extinguisher on flammable liquids.
Aircraft fuel is often composed mainly of kerosene, making it a class B fire. Because of the volume and spread of such fires, a compressed-air foam system is often used to create a layer of foam that smothers the fire.
Class B extinguisher
Carbon dioxide fire extinguishers can be used on Class B, C and E.
Type B
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Class B: Class B extinguishers are used on fires involving flammable liquids, such as grease, gasoline, oil, and oil-based paints.
A class C fire extinguisher is used for electrical fires. A all purpose A, B, C extinguisher can also be used.
type B
B-1 is for a Class B fire, that is, flammable/combustible liquids and gases.
Air carriers have a direct responsibility to provide air transportation with the highest possible degree of safety.
Class B extinguishers are used for liquid fires such as cooking oils. motor oils, gas and so on. If you don't expect toever have such a fire you probably don't need a class b extinguisher.