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.

3,663 Questions
Fire Extinguishers

How many B1 fire extinguishers must motorboats between 26 adn 40 feet have aboard?


Fire Extinguishers

Is a dry chemical powder from a fire extinguisher safe if mix in food?

No, The typical dry chem extinguisher has ammonium phosphate, potassium bicarbonate and sodium bicarbonate in it. While the sodium bicarb is nothing more than baking soda the the ammonium bicarb is harmful if swallowed. Potassium bicarb if ingested can upset the electrolyte balance in your body. So in short, don't eat the dry chem contaminated food. Recently the grocery store i was shopping at had a small electrical fire in the poultry section, an employee used a dry chem ext on the fire and they store had to throw out all food that had been in contact with the dust per the health dept. they ended up throwing out 4 1/2 full shopping carts of chicken ( all sealed in plastic) the health dept would not let them rinse and return the sealed packages.

Fire Extinguishers

Who is the inventor of fire extinguisher?

The first fire extinguisher of which there is any record was patented in England in 1723 by Ambrose Godfrey.

Fire Extinguishers

Why does the density of carbon dioxide as compared to air make the carbon dioxide useful as a fire extinguisher?

Put simply, fire requires three things to burn: a fuel, heat and oxygen. The fuel is whatever the fire is burning, and this may be something like wood, gasoline, paper, bedsheets, yeah you get the point. It creates its own heat, so that leaves one more: oxygen.

Oxygen is present in the atmosphere, the atmosphere is all around the fire. Oxygen is also a relatively light compared to carbon dioxide, because oxygen is O2 and carbon dioxide has an extra carbon atom in the molecule, CO2. When you release a lot of carbon dioxide, it instantaneously displaces the O2 in the atmosphere, because less dense objects like oxygen will rise. With no oxygen around, the fire extinguishes.

Fire Extinguishers

Can you put fire extinguisher in bed room?

Yes, a bedroom fire could be quickly extinguished if there were a fire extinguisher handy. There is no particular rule that requires an extinguisher in any sleeping area. Check with your local fire code administrators for more ideas about where is the best place to position a fire extinguisher in a residential occupancy.

Fire Extinguishers

What is inside a fire extinguisher?

Most fire extinguishers contain one of a family of chemicals called hyddrofluorocarbons plus pressurized carbon dioxide as a propelling agent. Hydrofluorocarbons function by making oxygen less available to the fire, and fires cannot burn without oxygen.

Fire Extinguishers

Why is carbon dioxide good gas for use in fire extinguishers?

because fire needs oxygen to burn ,if you use carbon dioxide on the fire,then it will not be able to burn due to the lack of oxygen.Thus the fire will go out.

Fire Extinguishers

What does the letter B on a B-1 fire extinguisher indicate?

The B determines the type of fire that can be extinguished, and in this case it would be flammable liquids such as gasoline, grease, oil, diesel fuel, and kerosene.

The number indicates the approximate number of square feet the unit can extinguish, so a B-1 would be a relatively small extinguisher.

Fire Extinguishers

How many b-1 fire extinguishers must a motorboat between 26 and 40 feet have aboard?

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. NOTE: According to US Coast Guard regulations. 46 CFR 25.30.

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

Under Canadian CG regs, it would need one Class B-II extinguisher, even if it is not a motorboat, if it has liquid or gas-fueled heating or cooking aboard, for boats 8 to 12 meters (26.2 to 39.4 feet). A B-II is a 5-pound dry chemical with proper approval labels.

Canadian regulations have the same requirement for powerboats 8 to 12 meters, or for any boat that size with liquid or gas-fueled heating or cooking.

If it is not a powerboat, but it has liquid or gas-fueled heat or cooking, under Canadian regulations it would still need at least one Class B-II extinguisher, if it is over 8 meters (26.2 ft) and under 12 meters (39.4 ft). If it were exactly 26 ft, it would only need one class B-1 extinguisher.

Fire Extinguishers

Will the contents of a fire extinguisher ruin the paint work on your car?

Generally, no, but a fire would.

Fire Extinguishers

How does the process of dry cleaning work?

Dry Cleaning is a process that cleans clothes without water. The cleaning fluid that is used is a liquid - most commonly perchlorethylene(perc). All garments are immersed and cleaned in a liquid solvent -- the fact that there is no water is why the process is called "dry." The process involves using a dry to dry machine like a home washer and dryer both in one machine. The garments are put in the machine's basket, immersed in the solvent. The solvent passes over and in the basket cleaning the garments within, several cycles, passing through filteration devices built into the machine, and then the basket rotates fast extracting all the solvents back into the machine's tank or the distillation device. Then the basket rotates while heat is injected into the sytem, causing the solvent to evaporate reaching the top of the machine where a refrigeration coil is situated. When the hot solvent vepor hits the very cold refrigerated coil, it recondenses (like how rain is made) back into the sytem passing through a water separator removing any ambient moisture that had been transfered from dry garments into the solvent that they were cleaned with. This process of drying takes 20-30 minutes, and the garments are returned to a clean dry but usually wrinkly state. This is the end of the cleaning process. from here the garments are moved to the pressing stations, where the wrinkles are removed, and fabric is pressed to a level of perfection varied by the dry cleaner involved. Alex Najafi

Elements and Compounds
Thermodynamics and Statistical Mechanics
Fire Extinguishers

Can you fight a fire with liquid helium?

If you have enough liquid helium, it might smother the fire or cool the combusting materials that are supporting the fire so much that they are below their kindling temperature. However, this would be a very impractical fire fighting technique compared with using solid or liquid carbon dioxide, because carbon dioxide gas is denser than air while helium gas is much less dense than air. Furthermore, liquid helium is expensive and only rarely if ever available when one needs to fight a fire!

Note that the boiling point of helium is 4.22 K, −268.93 °C, −452.07 °F. From a practical standpoint it would be nearly impossible to maintain such extreme cryogenic conditions anywhere in the vicinity of a fire!

Fire Extinguishers

Can Halon fire extinguishers be used on electrical equipment?

Yes, Halon fire extinguishers can be used on electrical equipment- and in fact are often recommended.

Fire Extinguishers

What is flight line fire extinguishers?

Haylon 1211 150lb fire extinguisher

Fire Extinguishers

Does an ABC fire extinguisher extinguish fire by cooling it down?


Food & Cooking
Emergency Preparedness
Fire Extinguishers

How do you put out a grease pan fire?

To put out a grease pan fire carefully shake baking soda on it. Not baking powder, baking soda. Bicarbonate of soda, the same stuff used to keep refrigerators smelling fresh.

Another suggestion...

If you have a lid that fits onto the frying pan, or whatever the pot or pan is that contains the grease, place the lid as tightly/closely as possible over the top. A grease fire should be suffocated that way. If you don't have a lid, try using another pan a little larger than the one that's on fire.

Never ever pour water onto a grease fire.

If you can't do any of the above, leave the room immediately, alert any other people in the house and call the fire brigade.

Another answer:

One of the most important pieces of kitchen equipment is a good, thick, pure-cotton, large (around 140cm x 70cm - 55in x 30in) bath towel, kept on a rack in a central area.

In the case of a pan fire, a grill (broiler) fire, or similar emergencies the towel can easily be thrown over the fire source at arms' length. It's highly dangerous to attempt placing a lid over a burning pan or other fire source once flames are beginning to rise; apart from time lost in finding an appropriate lid, even if you do find one the fire can flare up in a micro-second and you won't be able to control it, call emergency, or even warn the household, if you've just had your face and hands severely burned because you're standing over a fiery pan trying to put a lid on it.

Remember, firefighters wear protective gear and observe strict safety rules to prevent this kind of thing happening: emergency service personnel are no good to anybody if they injure themselves in the first moments of response. Amateur firefighters facing a domestic fire need to understand why this is so, and avoid placing themselves in danger.

The versatile thick towel shouldn't ever be used to wipe surfaces or greasy utensils; it should be kept clean.

It might seem to some an extravagance to put a good bath towel in the kitchen. It isn't. Once you've had it there for a week you'll wonder how you ever managed without it. I have two on rails fixed to work areas, near the ovens and sink, and near the fridge and stovetop; one of their great uses is they can be quickly flipped up onto the bench to take hot or wet dishes, or to drain washed fruit and vegetables, glassware, and so on. I clip mine to the rails so they stay in place, but a quick tug releases them. They're great for drying hands after washing up, and always to hand in case of a large water spill; you just throw a towel over the liquid so nobody's going to slip before you can mop it up. And we've all had those kitchen moments when we need to quickly move a pan that's hotter than expected and the oven gloves or trivet aren't immediately to hand: this is where the kitchen towel is a great friend.

Fire Extinguishers

Which chemical is used in dry powder fire extinguisher?

baking powder

Performing Arts
Fire Extinguishers

What substances do fire eating performers use?

I use transparent lamp oil. It is tasteless(mostly)

Fire Extinguishers

What account title is the purchase of fire extinguisher belong?


Fire Extinguishers

How does a carbon dioxide fire extinguisher remove oxygen from fire?

In a carbon dioxide extinguisher, the carbon dioxide is kept in pressurized liquid form in the cylinder. When the container is opened, the carbon dioxide expands to form a gas in the atmosphere. Carbon dioxide gas is heavier than oxygen, so it creates a blanket around the burning fuel and displaces the oxygen surrounding the fuel.

Or to simplify, it removes oxygen from the fire triangle, to smother it and extinguish it.

You also can take out one of the elements by using a wet sack or just a plain blanket

Fire Extinguishers

What fire extinguisher puts out metal fires?

Class D- Dry Chemical for fires in combustible metals such as sodium, magnesium, and potassium.

Fire Extinguishers

How do you charge the hose system on the 150 pound halon 1211 fire extinguisher?

Pull the pin and rotate the charge handle forward.

DIY Projects
Fire Extinguishers

How do I get stains out of counter tops?

Make a paste of baking soda and spread it over the stain. Place a wet cloth over it for some time. Then, when you lightly scrub it, the stain should come up.

Rules of the Road
Traffic Violations and Tickets
Fire Extinguishers

What is the center of a two-way road marked with?

Possibilities are:

Single or Double white line,

Single or Double yellow line,

Solid white line next to broken white line,

Solid yellow line next to broken white line,

No line on rural country lane roads.

Global Warming
Forest Fires
Fire Extinguishers

Why is carbon dioxide good for putting out fires?

Carbon dioxide is good for putting out fires because it displaces air (oxygen). The fire then cannot breathe. With the whoosh of a CO2 extinguisher comes a cold white cloud of carbon dioxide that rushes out of the nozzle and covers the target area like a fog. It pushes air (and the oxygen the fire needs to continue to burn) out of the way. Presto! No more fire! Carbon dioxide can be produced by baking soda and vinegar.


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