Fire <span title="extinguishers?helppppppppp">extinguishers?helpppppppp...</span> pllz?

Question

explain when to use the followings:

waters fire extinguisers?

co2 fire extinguisers

dry powder fire extinguisers

foam fire extinguisers?

Answer 1

Water - ordinary combustible materials such as paper, wood etc.

CO2 - best on burning liquids, electrical fires etc.

Dry powder - can be used on pretty much any type of fire but VERY messy!

Foam - Same as water plus burning liquids.

That&#039;s a quick rough guide but it&#039;s important to remember that all fire extinguishers only last a very short amount of time so they should not be relied on to fight fires and should only be used if you are trained in their use.

Answer 2

Choosing Fire Extinguishers

Identify the type of materials in the area

Class A: SOLIDS such as paper, wood, plastic etc

Class B: FLAMMABLE LIQUIDS such as paraffin, petrol, oil etc

Class C: FLAMMABLE GASES such as propane, butane, methane etc

Class D: METALS such as aluminium, magnesium, titanium etc

Class E: Fires involving ELECTRICAL APPARATUS

Class F: Cooking OIL &amp; FAT etc

water extinguisher:

it is the most cheapest and it can be used to put off simple fire in fires[a] or it can be used to put of huge sum of fire by the use of water piering with high speed.

co2 type extinguisher:

this extinguisher is a bit costlier but the most used one.it is used to put of accidental fire on oil,petrol

dry power type extinguisher:

it is a mixture of h2so4 and ca.it can all be used and even made at home.the baking soda which is a manual but used to put off small amount of water.when they fall on the fire.the stop the supply of o2 and so the fire can be put off.

foam:it is a bit more than water type extinguisher and can put off fire of small amount .

fire can also be put of by:

remove  the supporter of combustion.

prevent supply of o2.

it can also be put off by cutting any one in the fire triangle.

Answer 3

Water - for solids such as wood, paper etc. NOT for electrical apparatus or burning liquids.

Foam - as above, but usable on liquids too, such a fuel fires, which is why they flood the area around crashed aircraft with foam.

CO2 -  electrical apparatus, plus as above, but not recommended for loose materials such as paper which may be blown around by the pressure. It has no &quot;blanketing&quot; effect to prevent re-ignition.

Dry powder -  everything above, the most useful extinguisher, but messy

There are other, specialised, extinguishers but the above are what you meet in general.

Answer 4

Choosing Fire Extinguishers

Identify the type of materials in the area

Class A:  SOLIDS such as paper, wood, plastic etc

Class B:  FLAMMABLE LIQUIDS such as paraffin, petrol, oil etc

Class C:   FLAMMABLE GASES such as propane, butane, methane etc

Class D: METALS such as aluminium, magnesium, titanium etc

Class E: Fires involving ELECTRICAL APPARATUS

Class F: Cooking OIL &amp; FAT etc

Types of fire extinguisher

Water Fire Extinguishers:

The cheapest and most widely used fire extinguishers. Used for Class A fires. Not suitable for Class B (Liquid) fires, or where electricity is involved.

Foam Fire Extinguishers:

More expensive than water, but more versatile. Used for Classes A &amp; B fires. Foam spray extinguishers are not recommended for fires involving electricity, but are safer than water if inadvertently sprayed onto live electrical apparatus.

Dry Powder Fire Extinguishers:

Often termed the ‘multi-purpose’ extinguisher, as it can be used on classes A, B &amp; C fires. Best for running liquid fires (Class B). Will efficiently extinguish Class C gas fires, BUT BEWARE, IT CAN BE DANGEROUS TO EXTINGUISH A GAS FIRE WITHOUT FIRST ISOLATING THE GAS SUPPLY.  Special powders are available for class D metal fires.

Warning: when used indoors, powder can obscure vision or damage goods and machinery. It is also very messy.

CO2 Fire Extinguishers:

Carbon Dioxide is ideal for fires involving electrical apparatus, and will also extinguish class B liquid fires, but has NO POST FIRE SECURITY and the fire could re-ignite.

Wet chemical

Specialist extinguisher for class F fires.

For Metal Fires: A specialist fire extinguisher for use on Class D fires - metal fires such as sodium, lithium, manganese and aluminium when in the form of swarf or turnings.

Colour Coding

Prior to 1st Jan 1997, the code of practice for fire extinguishers in the UK was BS 5423, which advised the colour coding of fire extinguishers as follows:

Water - Red

Foam - Cream

Dry Powder - Blue

Carbon Dioxide (CO2) - Black

Halon - Green (now &#039;illegal&#039; except for a few exceptions such as the Police, Armed Services and Aircraft).

New extinguishers should conform to BS EN 3, which requires that the entire body of the extinguisher be coloured red. A zone of colour of up to 5% of the external area can be used to identify the contents using the old colour coding shown above.

Answer 5

Some add ons---never direct the fire extinguisher nozzle at the front of the fire always at the back and move it towards you.The reason you do not use water extinguishers with electrical fires is you can be killed with the shock.CTC extinguishers ( if found )also NOT on electrical fires as it produces a lethal gas on contact.Fire blanket---hold by one edge up in front of you,place the bottom at the start of the pan and drop over it away from you.You also have HALON GAS extinguishers used mainly on aircraft ,they are blue in collour