Fire Extinguishers

To stoke a fire is to put fuel on the fire.

yes

Silver is a water can (Class A) or a Class K for grease fryers. Red is ABC extinguishers (multi-purpose) and for CO extinguishers. Yellow is for Class D (flammable metals).

As for Fire Extinguisher LABEL colours, that depends on what they contain, which determines which type of fires each type may be used to extinguish, thus:

a) Red (Water/Gas originally) - for solid fuel (i.e.wood/paper), fires - though this colour has now been adopted for other extinguishers.

b) Blue (Dry Powder) - for Wheel/Brake fires on aircraft.

c) Cream (Foam) - for liquid/fuel fires.

d) Black (Carbon Dioxide gas) - for electrical or fuel fires.

e) Green (Bromoclorodiflouromethane, or BCF) - for fuel/electrical fires.

The green type is no longer available in the UK for civilian use.

it could possibly reignite after apparently being extinguished successfully.

Fire consists of Heat and the stuff that burns (usually oxygen from air and a combustible material). Removing any component extinguishes the fire. Carbon Dioxide CO2 is not flammable and pushes air (with it's highly reactive oxygen content) away, it is highly compressible and when released is very cold (aiding in reducing the heat. CO2 is not toxic (like the halons used in some fire fighting systems).

Class b

aim at the base sweeping motion

Ordinary combustibles, such as wood, cloth, paper, burning liquids such as gasoline, and fires in live electrical equipment. They are not for deep fat fryers (class K) nor for combustible metals such as magnesium (Class D fire).

In a 5 kg DCP cartridge type extinguisher .the co2 cartridge pressure becomes 7 kg/cm2.

Special F.D. Crash trucks are used to put out fires in aircraft. These trucks usually carry their own water and foam in the truck. Fire Hydrants are not located on runways. Foam is a major tool in airframe fires because it acts like a blanket. Other extinguishers like Carbon dioxide and special chemicals ( some no longer used like Chlorobromo methane) are also used to control or extinguish the fire. In Aircraft accidents Rescue is your primary concern. Military firemen ( Crash Rescue Specialist) also use special tools designed for rescue and firefighting military aircraft that have ejection systems and munitions onboard.

I personally drove a Crash Truck in the Air Force that carried 2,300 gallons of water and 300 gallons of foam with a crew of 4 Rescue Firemen. The truck carried a 1 1/2" handline, it had 2 Truck mounted Fire Foam Nozzles and 6 under truck nozzles. It was capable of driving into a pool of burning fuel to perform rescue, and that was back in 1965 during Vietnam. Today they are even better.

Halon, CO2, Neon,Nitrogen

Most use either kinetic energy in the form of a compressed gas, or chemical energy that is changed to kinetic energy (formation of a pressurized gas) to expel the extinguishing material.

As per Americal standard CLASS C is for electrical fire but in british standard it is not there because technically Electrical fire is not applicable since it will turns to CLASS A fire once it happened. so Dry Powder extinguisher is enough to extinguish the same.

The US has no standardized color system they use symbols. The colors are used in Europe with water being a solid red, foam red along a cream panel, dry powder is red with a blue panel, and red with a yellow panel is used with wet chemical.

A CO2 fire extinguisher will work on flammable liquid and electrical fires only. If used on any other type of fire they will just give it more oxygen and it will spread.

Aim the fire extinguisher at the base of the flames, and sweep back and forth

More specifically:
Trigger the fire alarm if not already done.
Have others leave the area.
Make sure you can get out safely and not be trapped.
Select a fire extinguisher type according to what is burning.
Pull the pin
Aim the nozzle at the fuel
Squeeze the handle
Sweep from the edges toward the center
Repeat, as necessary, with another extinguisher, if you have one.

onto many industrial purposes,

the Co2 fire extinguishers are often used in class B and C fires involving flammable liquids and electrical circuits. (one of the chemicals that cannot cause electric shock or can suppress flammable liquids).

CO2

Class A is for ordinary combustibles like cloth, paper, wood, rubber, plastic.

Most of the contents of soda-acid extinguishers (which are obsolete and completely illegal in the USA) is water. Water and oil don't mix well. The water may actually spread an oil fire as the flaming oil expands across the surface of the newly created puddle of water or as the oil is splashed in all directions by the force of the spray.

Soda-acid extinguishers can also be hazardous to operate even to fight the type of fire they were designed to fight (wood or paper fires) due to the fact that they contain a jar of sulphuric acid. As the user must invert the extinguisher first to dump the sulphuric acid into the sodium bicarbonate solution in the body of the extinguisher there is a chance that if something is wrong with the extinguisher or the user holds the nozzle wrong at that moment, he might get sulphuric acid on his skin or clothes!

Any chemical can be harmful in excessive amounts, and at the rate more fire-extinguishers dish them out, yes they will hurt you, or even kill you.

See your local safety instructor for full details on how each kind of extinguisher can be harmful in what way.

It depends on the fire type. There are 4 classes of fire extinguishers:

class A: paper, wood, cardboard, and most plastics. class B: flammable or combustible liquids such as gasoline, kerosene, grease and oil. class C: electrical equipment, such as appliances, wiring, circuit breakers and outlets. class D: combustible metals, such as magnesium, titanium, potassium and sodium

The extinguisher's rating is marked on the container. They are also colour coded for the specific type of fire.

The first fire extinguisher of which there is any record was patented in England in 1723 by Ambrose Godfrey, a celebrated chemist. It consisted of a cask of fire-extinguishing liquid containing a pewter chamber of gunpowder. This was connected with a system of fuses which were ignited, exploding the gunpowder and scattering the solution. This device was probably used to a limited extent, as Bradley's Weekly Messenger for November 7, 1729, refers to its efficiency in stopping a fire in London.