Fire Extinguishers

Class B

No, the ABC extinguisher uses a dry powder chemical composition that by its application displace the oxygen required to maintain the ignition process. additionally, since it disperses a fine dense cloud of powder, it coats the intended surface with its compound. This action extinguish the class A and B fires, however, this media does not provide any retardancy to the subject fire. additionally, class C is not meant to be a type of fire, instead is defines the cause of the fire, i.e., cause by an electrical energized charge that will require a non conductive medial that passed the 100,000 v generated by the test to qualify for a class C rating.

It gets very cold to the point that it could cause frostbite if you don't hold it where you're supposed to.

An electrical fire is a class "C" fire. A Class "C" fire is actually a class "A" or "B" fire that is caused by electrical current.

It used to be thought that foam blanketed burning substanecs from the air, smothering the fire, and so the side of the fire triangle removed would be "oxygen". Recent research suggests that, whilst smothering plays a small part in foam's effectiveness, its main value is to reduce the transfer of vapours from the burning substance to the flames. In this way, it acts to prevent fuel reaching the flames, and so extinguishes by starvation. Foam also contains about 96% water, and so will cool burning substances below their ignition point. Summary: foam attacks all three sides of the fire triangle, but its main action is to reduce the flow of fuel from the surface of the burning substance to the flames. Note that many science teachers still follow the incorrect information in textbooks which states that foam "smothers" a fire (e.g. excludes oxygen). The UK Manual of Firemanship (official guide for UK firefighters), and the Royal Navy's technical firefighting handbook both provide evidence for the "starvation of fuel" mechanism. In case of a dispute, you could point out that nowadays, all foam (from extinguishers and larger foam generators / branchpipes) is made of a detergent solution that is blown full of air: a blanket of air bubbles wouldn't be particularly effective in simply smothering a fire, but the fact that the bubbles are made from detergent solution allows the foam to spread in a thin flim over the surface of the fuel, stopping the flow of vapour. Modern developments of this theory include the design of afff (aqueous film-forming foam) concentrates which are even more effective at "filming" over a burning substance.

he didn't. that one of americas greatest shams in order to make a good story.

Motorboats between 26 and 40 feet must have two B-I extinguishers.

B-I is either 2 pounds dry chem, 4 pounds CO2 or 6 quarts foam.

According to US Coast Guard regulations.

NOTE: When a fixed fire extinguisher system is installed in the machinery space(s), it will replace one B-I type portable extinguisher.

Different regulations may apply to uninspected passenger vessels, including those "carrying not more than six passengers, including at least one passenger-for-hire" and for vessels in "international waters".

The first thing you must do is make sure you can get out safely if you are unable to stop the fire with the extinguisher.

The second thing is to determine what type of fire it is so you choose the proper type of fire extinguisher. Do not consider a fire extinguisher if the fire is more than waist high or larger than 10 square feet -- leave immediately.

The next thing is to get between the fire and your primary exit and use the extinguisher on the fire.

Well, you CAN- depending on the type of fire.

Unless you are equipped with self-contained breathing apparatus (SCBA), you should avoid using fire extinguishers that displace the breathable oxygen, generate other asphyxiants or otherwise implicate your ability to breathe.

If you do not have SCBA and vapor-barrier protection (e.g., structural or aircraft firefighter turnout suit) and you should avoid using water-based extinguishers that can turn into 20,000 times more steam.

Kitchens should have an ABC extinguisher. Commercial kitchens with "cooking media" such as deep fryers would also need a Type K extinguisher.

Liquid (oil) fires.

It depends upon what kind of extinguisher it is. Water, for example, removes the heat from a fire by turning into steam and by removing available air/oxygen from the flames.

Other extinguishers remove the oxygen from the fire or change the chemical reaction to stop the fire from converting the fuel to a flammable substance with the available heat.

Fortunately you can purchase fire retardant spray from many stores. For online purchases, Amazon carries several fire retardant sprays. Also, stores such as Home Depot and Sears carry such sprays.

A fire extinguisher is a fire protection device used to put out or control small fires, usually in emergency situations. A typical self-expelling fire extinguisher empties its contents in under a minute.

Fire extinguishers are rated according to the type of fires they can be used on and how much fire they can extinguish.

Typical types of extinguishers include A, B, C, D, K.

Ratings often include a number in addition the letters, such as 5A, 20BC, meaning five times the class A rating needed for the smallest fire and enough chemical to extinguish 20 square feet of class B fire.

A dry chemical fire extinguisher might be the best choice for confined spaces. The powder isn't particularly pleasant to breathe, but could be fairly well filtered through a hankie or bandanna across the nose. The carbon dioxide (CO2) extinguisher might displace the air (and the oxygen) in the space and render the would-be firefighter unconscious. The results may be fatal. In any case, attempting to suppress a fire in a confined space is something that should be approached with great care by anyone who is not trained or equipped (clothed, including breathing apparatus) to do the job safely.

Powerboat, unless it is a small, open, outboard (Class A or Class 1) that otherwise qualifies for exemption.

At least one USCG-approved Class B-1 fire extinguisher is required on any powerboat with a permanently installed fuel tank or carrying passengers for hire.

A UL-listed 5-B:C extinguisher, with 2 pounds of dry chemical, may provide the basis for the extinguisher, but it must ALSO conform to USCG-approvals (proper corrosion protection, labeling, mounting bracket, etc).

A 4-pound CO2 extinguisher or 6 quarts foam extinguisher may also be rated for USCG B-1 service.

Powerboats over 26 feet may require additional extinguishers, as detailed in the related questions.

Water and electricity generally do not mix very well. Impurities in ordinary tap water help make it a good conductor of electricity. Using a water fire extinguisher on an electrical fire will almost always present a major shock hazard and should never be considered. That being said there is a "special" type of water fire extinguisher that can be used on electrical fires, but it uses purified distilled water and a special nozzle that disperses the water in tiny beads. To be safe, unless you know what type of extinguisher you have and what it is used for, it is best to evacuate the area and call the fire department.

it makes big sparks

Ordinary burning solids (wood, cloth) would need a water extinguisher (Class A). Burning metallic solids (lithium, magnesium) would need a special power found in Class D fire extinguishers (in the USA).

A Class ABC extinguisher would also work on ordinary combustibles (Class A fire), but not on Class D solid fires.

eliminate the fuel,

eliminate the air,

or cool it below the ignition point

Using the "fire tetrahedron", rather than triangle, you could also stop a fire by breaking the chemical chain reaction that keeps the fire burning.