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WorksheetsCHAPTER 7 - air [ F1 ]
Total questions: 8
Worksheet time: 5mins
state the conditions required for combustion
carbon monoxide
oxygen
heat
fuel
energy
there are 4 types of fire extinguisher, state 4 that is correct
water
carbon dioxide
foam
dry sand
petrol
Which type of extinguisher is suitable to be placed at home? ( to put out fire on all types of material )
Dry powder fire extinguisher
Foam fire extinguisher
dry sand fire extinguisher
Using foam to put out the fire is way more effective than using water.
Why is that?
(2 correct answers)
fire hoses expel water in the form of small droplets/mist.
This is to improve the chances of water evaporating which reduces heat.
That is because foam can put out all types of materials that is caught on fire.
Why the fire extinguisher that contains water is not suitable to put out fire caused by petrol?
Water is denser than oil.
Water is the fastest way to put out fire that’s been caused
Techniques to extinguish the fire:
Covering the surface of fuel to cut off the contact of the fuel with oxygen/air. EXMPLE: fire blanket, wet sack
Cooling the surface of burning materials by spraying water of a layer of carbon dioxide.
Separate burning materials and cutting off the supply of gas or oil.
all of above
one of the safety measures to prevent the occurrence of fire
keep away flammable substances from fire
always be aware of your electrical appliances
do not plug too many electrical appliances to a single electrical source
all of above
method in using fire extinguisher (PASS)
Pull
Aim
Squeeze
Sweep
