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Fire safety research coursework. Experiment making a fire extinguisher

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Introduction

A fire needs oxygen, heat and fuel. The most common causes of fires are: Open flames-candles, matches, cigarettes. Arson-purposely setting fires to buildings and other things Electrical equipment-damaged electrical equipment, overloaded plugs Cooking- unattended cooking appliances A fire extinguisher is an device which contains chemicals that can be sprayed onto a small fire to control or extinguish it. Different colours are used for different types of fire extinguishers: Water-Red This fire extinguisher is used the most and is used for class A fires. Foam-Cream These are more expensive than water extinguishers but can be used for two types of fires. These two types of fires are A+B. Dry powder-Blue This fire extinguisher can be used on fires class A,B&C but they are best for fires class B. Carbon dioxide (CO2) - Black A black fire extinguisher is ideal for class E fires but can also be used for fires of class B but when these are used there is a chance that the fire could re-ignite. ...read more.

Middle

Put 2 spatula measures of aluminium sulphate into a beaker containing 30cm3 of water. Stir vigorously. 2. Now add 2 spatula measures of sodium hydrogen carbonate to the other beaker and add 30cm3 of water to this. Stir vigorously. 3. Pour the aluminium sulphate solution into the conical flask and add a few drops of washing up liquid. This is will make the fire extinguisher foam. 4. Carefully add the contents of the other beaker to the conical flask. Put the bung and delivery tube on quickly and stand back. Make sure you direct the jet into a sink. After I have finished making the foam extinguisher foam came out of the delivery tube. A fire sprinkler discharges water when there is a fire. The water is discharged when a certain temperature is reached (usually 165F). A fire sprinkler controls the fire and helps to put it out. ...read more.

Conclusion

I have seen a demonstration of how a disabled pupil would get down the stairs on an evacuation chair if there was a fire in the building. In the Stevenson building in our school there are 3 evacuation chairs on each floor. On each floor there is also a refuge point. I have compared a map of our school and another business. In our school every door is a fire door and in the other business there are two fire doors and one normal door. In our school there are fire blankets in the bistro, canteen, science rooms and some technology rooms. In the business I compared there are no fire blankets. In our school there are fire extinguishers in most rooms and corridors. In the business I compared our school with there is a fire extinguisher by every fire door. Sites I have used: http://www.actfire.co.uk/general/fire_extinguisher_advice.php http://www.mfs-fire-extinguishers.co.uk/types.htm http://en.wikipedia.org/wiki/Fire_extinguisher Google images http://en.wikipedia.org/wiki/Fire_door http://en.wikipedia.org/wiki/Escape_chair http://www.firebusters.com/sprforhome/howsprswork.phtml http://www.firesafe.org.uk/html/fsequip/resprink.htm http://www.firesprinklersystemsinfo.com/types-of-fire-sprinkler-system.htm http://www.coffcofire.com/fire-sprinklers.htm http://en.wikipedia.org/wiki/Fire_sprinkler_system ...read more.

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