【Daily Question】November 8, 2017
Thread Content
The three conditions necessary for combustion: ( ) ( ) ( ). Answer: (Flammable material) (Oxidizer) (Ignition source)
Flammable materials, oxidizing agents, ignition sources
(Combustible material) (Oxidizer) (Ignition source)
(1) Combustibles: Whether solid, liquid, or gas, any substance that can react violently with oxygen or other oxidizing agents in the air is generally considered a combustible substance, such as wood, paper, gasoline, alcohol, gas, etc. (2) Oxidizers: Substances that can aid and support combustion are called oxidizers. These typically include oxygen and other oxidizing agents, with oxygen in the air being the most important one. This oxygen is known as atmospheric oxygen and makes up about 21% of the air. Combustible substances cannot burn without the involvement of oxygen; for example, burning 1 kilogram of petroleum requires 10–12 cubic meters of air, while burning 1 kilogram of wood requires 4–5 cubic meters of air. When there is insufficient air supply, the combustion gradually weakens until it stops. Combustion does not occur when the oxygen content in the air is below 14–18%. (3) Ignition sources: Any source of energy that can cause combustible substances to burn is called an ignition source, such as an open flame, friction, impact, electric sparks, etc.
Flammable materials, oxidizing agents, ignition sources
Flammable materials, oxidizing agents, ignition sources
Flammable materials, oxidizing agents, ignition sources
Flammable materials, oxidizing agents, ignition sources
Combustibles, oxidizers, ignition point
Flammable materials, oxidizing agents, ignition sources