7.2
Combustion
| 7.2 | Combustion |
| Definition |
|
Combustion is the reaction that occurs when a substance is heated in the presence of oxygen which produces heat energy and light energy |
Three condition needed for combustion:
- Oxygen
- Fuel
- Heat
| Types of fire extinguisher for different sources of fire | ||
| Material on fire | Example of material | Type of fire extinguisher |
| Solid | Wood cloth, paper | Water, dry power |
| Liquid | Oil, varnish, paint | Foam, dry powder, carbon dioxide |
| Gas | Propane, acetylene | Foam, dry powder, carbon dioxide |
| Metal | Potassium, sodiumm, magnesium | Dry powder, dry sand |
Conditions needed for removing combustion:
- Covering: Covering the surface of fuel with fire blanket, wet sack
- Cooling: Cooling surface of burning materials by spraying water or a layer of carbon dioxide
- Reducing the amount of burning materials
Safety measures to prevent the occurence of fire:
- Keep away flammable substances from fire
- Always be aware of your electrical appliances
- Do not plug in too many electrical appliances to a single electrical source
- Install fire alarm and smoke detector at home
- Do not throw away cigaratte butts when they are still burning
- Keep matches and lighters in a safe place
