Classification of fire 22 class d or iv fires involve

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Classification of fire
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22 Class D or (IV) fires involve metal Classification of fire
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23 Fire extinguishing by breaking up the fire triangle Fire Heat Oxygen Fuel
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24 Extinct and control fire by Removing fuel for combustion Removing the heat of fire Reducing oxygen for combustion Fire extinction Fire Heat Oxygen Fuel (fuel starvation ) 饑餓法 (cooling ) 冷卻法 (smothering ) 窒熄法
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25 Fuel starvation Remove nearby combustible materials Remove burning materials from nearby combustible materials Reduce burning materials into smaller fires easier to control left to burn out. Fire Heat Oxygen Fuel
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26 Smothering Remove oxygen by covering the surface with layer of foam filling confined space (such as plant room) with inert gas Fire Heat Oxygen Fuel
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27 Cooling Most common method to extinguish fire By cooling fire and solid fuel to below ignition temperature Water is best because Cheap Readily available High latent heat of vapourisation Fire Heat Oxygen Fuel
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28 Portable Fire Extinguisher Class A – Solid Material such as paper, wood, plastic etc. (Water, Foam & Dry powder) Class B – Flammable liquid such as petrol , kerosene etc. (Foam, Carbon dioxide & Dry powder) Class C – Fire involves electrical equipment (Carbon dioxide & Dry powder) Class D – Fire involves meta l
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29 How to Use a Fire Extinguisher remember the acronym PASS, P ull the pin A im the extinguisher or nozzle at the base of the fire S queeze the handle to release the extinguishing agent S weep the extinguisher from side to side across the base of the fire until it is put out.
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30 Using hose wheel First, pick up the hose reel at a safe place which is near the fire ground. Then, break the glass of the fire alarm call point to activate the alarm and the fire pump. Turn on the control valve of the water supply main to the full, pull the plastic tubing from the drum, and point the nozzle to the fire. Turn on the nozzle valve and operate the fire hose at a safe distance.
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31 Fire Escapes maintain in good condition free from obstruction every doorway, stairway and passageway within the workplace which provide a means of escape from the workplace in case of fire.
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  • Fall '18
  • Combustion, Fire extinguisher, Director of Fire Services, Fire Services Department

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