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Fire Extinguishers

Fire extinguishers are used in homes, schools, businesses and boats as a way to put out a small fire. Fire extinguishers come in many types for different purposes, including portable or fixed systems. This category relates to the science, origins, operation, selection and standards for fire extinguishers.

1,462 Questions

What is the best type of fire extinguisher or fire agent that can be applied to all classes of fire?

red = water and is used for wood paper textiles and solid material fires.

DO not use on liquid elictrical or metal fires.

blue = powder and is used for liquid and electrical fires.

DO not use on metal fires.

yellow = foam and is used for liquid fires.

DO not use on electrical or metal fires

black = carbon dioxide (CO) and is used for liquid and electrical fires

DO not use on metal fires.

halon can be used on all fires as well as dry chemical

If a grease cooking fire starts you should?

You might avoid a grease fire by preventing the grease/oil from reaching its ignition point and by keeping it from boiling over onto a source of ignition (e.g., a hot flame).

Why are fire extinguishers not used on electrical fires?

Water is conductive and can thus aid the fire instead of the extinguishing thereof. Type C extinguishers is made especially for electrical fires and can thus be used. In computer server rooms or laboratories with sensitive equipment, you do not want to release a dry powder extinguisher, so use a CO2 extinguisher in those places

How were old fashioned fire extinguishers made?

You would have to drop the fire extinguisher on its head because the carbonate and the acid are separated and one of them in a glass container at the top of the extinguisher dropping it on its head would break the glass and make the chemicals connect together and a chemical reaction would take place then the extinguisher would be ready for use. In the glass container there also would be some sort of detergent that made the extinguishing formula froffy.

When using a fire extinguisher you should aim it?

My dad s a retired fire fighter and the mechanisms he used were although more olden kind, they were similar to the fire extinguisher. In a life threatening situation you must not panic and aim it in the middle up of the fire, releasing the outer burning energy and then go around it smothering the fire.

HOPE THAT HELPS!!!

What is the difference between CO2 fire extinguishers and DCP fire extinguishers?

ABC is the acronym for an extinguisher certified for A, B, and C type fires.

A is common fuels like wood, B is for flammable liquids, and C is for charged electrical fires.

DCP stands for Dry Chemical Powder, which is inside the extinguisher and is the actual fire suppressant.

Basically, DCP is a type of ABC Extinguisher. You can also get extinguishers for Type D (combustible metals), Type K (kitchen), and other specialized extinguishing agents (i.e. Halon). Or you can get a Type A extinguisher, AB, B, BC, ABC, and others even!

What type of fire extinguisher do you use for metals like magnesium?

Only a Class D fire extinguisher should be used on fires involving combustible metals, such as magnesium. It will smother them by denying access to oxygen.

What can ABC fire extinguisher be used on?

General purpose extinguisher, can be used for most fires (except cooking fats)

Why must fire exits be kept clear of obstructions at all times?

Because if there is a fire you have to be able to get out as fast as possible and if there are things in your way you could die.

What does the letter B in B1 fire extinguisher stand for?

B extinguishers are for putting out flammable liquids. These must be carried on boats.

What class of fire is a deep fryer firer?

I am pretty sure you would use a class K. This is designed for kitchen fires with combustable cooking materials included.

What is the standard mounting height for a fire extinguisher?

Portable fire extinguishers under 40 pounds should be mounted so that the top is no more than 5 feet from the floor; those over 40 pounds, within 3 1/2 feet. The bottom must be at least 4 inches from the floor, unless the extinguisher is on wheels. NFPA 1.

How does a carbon dioxide extinguisher put out an electric fire?

Yes, carbon dioxide (CO2) can be used by a firefighter (or a trained individual on scene) to extinguish an electrical fire. The carbon dioxide fire extinguisher is a specific type of fire extinguisher, and is in fairly common use. Compressed CO2 is pumped into the cylinder, and held in there behind a hand-operated valve. Pull he pin, grab the handle with one hand and the handle of the nozzle with the other, and get busy. Use the PASS system: pull the pin, aim the nozzle at the base of the flames, squeeze the handle, sweep the nozzle from side to side. The CO2 extinguisher can be distinguished by the large "cone" of its nozzle. Be sure to grab the nozzle by the handle as it is insulated. The CO2 exits the bottle and is really cold when it does. It will freeze your hand if you grab the nozzle or the hose instead of the handle. The extinguisher will make a fairly loud noise when you discharge it, but expect that and then ignore it. You're the first responder, and you can effectively use this device, just like a firefighter would.

What condition would require that a vessel carry at least one Type B fire extinguisher on board?

By themselves, none of these conditions require a fire extinguisher on a boat:

  • outboard motor
  • passengers
  • fixed, unenclosed seats
  • over 16 feet
  • operating at night

Also, a vessel less than 26 feet would not require a fire extinguisher unless other conditions are present (inboard motor, fuel tanks, etc).

How many different fire extinguishers?

There are 6 different types of categories for extinguishers.

Class A: SOLIDS such as paper, wood, plastic etcClass B: FLAMMABLE LIQUIDS such as paraffin, petrol, oil etcClass C: FLAMMABLE GASES such as propane, butane, methane etcClass D:METALS such as aluminium, magnesium, titanium etcClass E:Fires involving ELECTRICAL APPARATUSClass F:Cooking OIL & FAT etc

What are two ways to attend a fire academy?

applying to the academy and Being in another public service

What does a dry chemical fire extinguisher do?

A dry chemical fire extinguisher is a fire extinguisher that disburses a dry chemical agent to actively suppress a fire. The agent will smother the fire (cut off oxygen) and halt the chemistry (free radical production) of a small blaze. Compressed nitrogen is the most common propellant for the powder. The powder used in the device can be any one of several different chemicals, and the ones we commonly see include ammonium phosphate, sodium bicarbonate, and potassium bicarbonate, or a combination of them and another ingredient. The type of chemical will determine its rating (class A, B and/or C fires), and the chemical properties of the agent will determine its effectiveness on a given fire type and what can be expected in cleaning up after the fire. A link is included below so you can check facts and gather additional information.

How much does CO2 fire extinguisher cost?

Fire extinguishers come in a wide range of types and sizes. A small ABC-type can be had for under $20. An ordinary pressurized-water type can be obtained for about $100. A Halon system for a computer center might be closer to $50,000 and could cost thousands of dollars to replenish each time it gets used, which is still less than the cost of repairing fire and water damage that could result from other alternatives.

Why do fire extinguishers have carbon dioxide when fire is made out of carbon dioxide?

carbon dioxide is significantly denser than air and tends to settle on the ground displacing oxygen and putting out the fire. Nitrogen makes up 78% of the atmosphere so 100% nitrogen isn't very different in density than air.

The USCG requires which type of fire extinguisher to be on-board a PWC?

Your fire extinguisher must be Coast Guard approved

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How many and what type depends on the type of boat.

Look at Federal Requirements for Recreational Boats

Here's a summary of requirements for vessel type

All motor vessels are required to have a Type B fire extinguisher(s) on board if one or more of the following conditions exist:

  • Inboard engine
  • Vessel length of 26 feet or longer
  • Closed compartments where portable fuel tanks may be stored
  • Double-bottoms which are not sealed to the hull or which are not completely filled with flotation material
  • Enclosed living spaces
  • Closed storage compartments in which flammable or combustible materials may be stored
  • Permanently installed fuel tanks

So essentially if you have an inboard engine or permanent fuel tanks or enclosed compartments (for any size boat) you need at least one fire extinguisher. See the brochure at the link below. If the boat is 26 feet or over, you may need two or more.

Similarly, if your boat has an outboard motor and meets any of the other requirements in the list above, it too must have at least one B-1 fire extinguisher.

Each state may have additional requirements that may be more strict. Check with your state Boating law administrator.

Boats with outboards less than 26' and without permanent fuel tanks do not require fire extinguishers (unless they carry paying passengers).

Boats 26 - 40' require two B-I type portable extinguishers or one B-II type.

Boats 40 - 65' require at least three B-I type or one B-I type plus one B-II type portable extinguishers.

To clarify the requirements on Class A or Class 1 outboards:

What this means is simply if you have compartments or lockers on your boat, even though it is under 26 feet and has portable fuel tanks mounted in the open, you still must have a fire extinguisher. The only exceptions are completely open boats with no compartments or lockers, and no decks. Live bait wells are not considered compartments or lockers. But if you have a splash well for the outboard, and the tanks are under the splash well, and there is some sort of curtain, a hatch or door closing off the area under the splash well, then that is a compartment and you need a fire extinguisher.

What type of fire extinguishers used for gas fire?

An "ABC" extinguisher will put out a gasoline fire but I recommend an extinguisher that uses Halon. Halon will not corrode an engines internals like the ABC type will. Halon deprives the fire of oxygen to extinguish the fire. A lot of race car drivers use the same type systems on their cars in case of fires. Addendum: Halon has been out of production since the early 1990's and availability is very limited. There are various other "clean" agents on the market that have been developed as halon replacements, but they can be quite expensive. An alternative to these expensive products, although a powder and quite messy, is regular "BC" chemical. Unlike the "ABC" product "BC" does not melt a stick to metal, instead it simply smothers the fire and is easier to clean off than ABC - although it too is corrosive.