Firefighters

The combustion process begins when a fuel source is heated beyond its ignition temperature in the presence of an oxidant, with this molecular energy creating a self-sustaining chemical chain reaction of radicals when the energy it produces is greater than or equal to the energy needed for continued burning.

so by this definition removal of the oxidising agent will prevent the chain reaction to occur.

A sand bucket is best suited for extinguishing small fires caused by flammable liquids, paper, wood, and electrical equipment. It is not effective for extinguishing fires involving cooking oils, grease, or electrical systems.

Yes, it is important to watch for reignition as smoldering embers or hot spots can flare up into flames again. Monitoring for any signs of smoke, heat, or rekindling ensures the fire is fully extinguished to prevent a potential re-ignition.

to light it rub two sticks together and it makes heat which creates fire try rubing ur hands it works to extinguish if theres sand near by use that or something that can prevent oxygen from reaching the fire

first you must understand that in order to burn a fire needs fuel, heat, oxygen, some sort of reaction. carbondioxide extinguishes fire by removing the oxygen from the equation which in turn stops the reaction, causes the heat to dissipate, and then all thats left is partially burned fuel.

When fire burns, it creates heat which causes the water molecules to evaporate and turn into steam. This steam rises rapidly due to the heat, creating a vacuum effect that sucks in more surrounding water to replace what has evaporated. This process is known as the 'steam explosion effect'.

Fire safety is exceptionally important in a laboratory, as they tend to have significant numbers of highly flammable chemicals, which could lead to the fire being very severe very quickly. If fire drill procedures are not obeyed, it leads to a high risk to safety for all persons in the laboratory.

The rules pertaining to a fire drill in a lab vary from laboratory to laboratory, so you would need to check the fire safety procedures for the lab where you are working.

A wheel well fire is unique because it can be four of the five fire classes:

the tires are Class A--flammable solids
the fluids are Class B--flammable liquids
you've probably got electrical actuators in there, so you've also got a Class C--electrical--fire on your hands.
and the plane has some aluminum, magnesium and maybe titanium components; heat them up enough and you're looking at a Class D--flammable metals--fire.


What it WON'T be is a Class K--kitchen flammables--fire.


In the air you'll just use your Class ABC built-in suppression system. If you land the thing on fire, they'll use Aqueous Film Forming Foam.

Dry chemical powder can expire over time due to factors such as moisture, temperature exposure, and chemical degradation. It is recommended to check the expiration date provided by the manufacturer and replace it as needed to ensure it remains effective in case of emergency fire situations.

What you hear on news programs is a certain percent contained! Not controlled. The percentage that is contained is how much actual fireline that is surrounding the active fire. The fire is not controlled until you have 100% containment,generaly!

The largest hose is believed to be the Voring Plateau Deepwater Cross-Over in Norway, measuring almost 400 feet in height and stretching over a steep waterfall. This hose is used to transfer water from the river above to a power station below.

1025 Blue Ridge Rd, Raleigh, NC is the address/location of the North Carolina State Fair, which boasts a 21-foot tall statue of Smokey Bear with a forestry exhibit.

There IS a Smokey Bear State Forest in Minnesota...

A class C fire involves energized electrical equipment. It should not be extinguished using water, as it can conduct electricity and cause electrocution. To extinguish a class C fire, it is recommended to use a dry chemical or carbon dioxide fire extinguisher designed for use on electrical fires.

Fires start only in the presence of oxygen, fuel, and energy. There has to be enough energy provided, by either chemical, electrical, or physical means for the fuel to reach it's heat of combustion. For example, rubbing two sticks together generates heat energy by friction. If this heat energy is provided at such a rate that the fuel, wood, reaches it's heat of combustion then the wood will ignite, assuming the presence of oxygen. The reason you have to rub vigorously for wood is because the heat is dissipated in time so the energy is no longer localized.

That depends on the size of the fire.

If it is in a fireplace or woodstove, there is a mechanism that rotates a cylinder (with slots and orange, yellow and red gels) around a lightbulb to produce the effect of contained flame.

If the fire is to be much larger, the same effect can be obtained by throwing this light across a longer distance. Of course the apparatus would need to be larger, if not physically, then in terms of wattage. Or two sets of gels, each cut to represent flames but different in shape from each other, could be placed side by side and rapidly and alternately lit, to achieve the appearance of fire. This works especially well if the gels are fanned to make them move and flicker.

There are many other ways to produce this affect. But, however it is produced, don't forget the smoke machine.

Fire trucks come in many different colors. The most common is the traditional red, however during the 1970s the company Ward LaFrance marketed lime green apparatus as being more visible. This color, along with others, became popular for several years, but eventually the standard red regained dominance. Some colors that are used include red, lime green, dark green, light green, white, blue, and yellow. Other colors can be found, however they are uncommon different colors depend where you are and what service the airforce use lime green,most forestry is either blue or white.and ward lafrance became amrican lafrance and now are bankrupt

A person's hair fire should be smothered by using a heavy material like a coat or a blanket, or by using a fire extinguisher if available. If a person's clothing is on fire, they should stop, drop to the ground, cover their face, and roll to smother the flames.

If you have plenty of crank, but, no, fire, then your problem is in the fuel system. Check your fuel pump by disconnecting the lower fuel line on the filter and then try starting the car. If no fuel comes out of the line, you have found your problem! Bad fuel pump!

When using a high pressure pump, you'll find that a smaller output nozzle gives *shorter* spray than a large nozzle. Small nozzles limit the flow. Yet with a garden hose things are reversed. Why?

It's because the long narrow hose and the pipes connecting it are acting like "friction." If you turn on the water, the hose rubs against the wate, and water flows relatively slowly out the end of the hose. Also, the water pressure at the open end of the hose is very low.

Now install a garden sprayer at the hose end. This will greatly slow down the water flow, and the effect of friction is greatly reduced. The pressure at the far end of the hose rises, and this high pressure can create a very long (but narrow) spray.

Another way to explain is with numbers. The greater the fluid resistance is to a constant flow, the greater the pressure-difference must be across that resistance. The fluid resistance value of the hose is large, while the resistance value of the hose-end is small, and since the same flow goes through both the hose and through its end-opening, most of the pressure-difference appears along the hose, while very little pressure-difference appears between the

hose and its opening. Now install a very narrow opening. If the fluid resistance of this nozzle is the same as the fluid resistance of the hose, then half of the faucet pressure appears along the hose, while the other half appears between the hose-end and the outside world. The nozzle has increased the pressure at the hose end. And if the fluid resistance value of the nozzle is much greater than that of the hose, then nearly all of the faucet pressure will appear at the nozzle.

So, to produce a long jet of water, use a very wide hose and a very narrow nozzle. Or even better, entirely get rid of the resistance created by the hose, and connect the nozzle directly to a high pressure water pump.

Fire is caused by oxygen and CO2

Without oxygen it can't burn...

you might want to look more in depth in this....

Fire is very dangerous and can kill millions there was no cure to fire done by izzyfor4reel

Yo, you really need to improve on this

What is this,it's like a gr.2 answer

I was fire fighter during the nineteen seventies, for both the California Department of Forestry, and the US Forest Service. The first fiire shelters, or aluminized fire tents were issued in 1978, and 1979. It was requirement to have one on your belt or you could not be on the fireline.

Yes.

Firefighting foam is normally used in diluted form - 1-6% foam and 94-99% water, depending on the application. This reduces its corrosive effects, but the pure agent can be quite damaging to equipment over time.

Eg: On the Antarctic FD (Mcmurdo Station, Antarctica) we bought 4 new air rescue firefighting vehicles in 2005 which we filled with a non-freezing undiluted foam/antifreeze mix. When we attempted to use the vehicles for the first time in 2007, the brass fittings on the foam lines blew apart in several places as soon as they were charged, rendering the truck useless. This was due to corrosion by the foam agent, which had leaked past the check valves and filled the foam lines for an extended time.

Some commercially important free radical reactions include polymerization reactions for producing plastics, oxidation reactions for synthesizing certain chemicals, and free radical halogenation reactions for producing products such as chlorofluorocarbons.

Fire is not invisible; fire is the chemical chain reaction from combustion that creates heat and light. Combustion, which is the actual burning process, is strictly chemical rearrangement and is invisible - but once you add oxygen to it, it becomes visible as fire.