On which of the following types of surfaces should a Class B fire extinguisher not to be used?

Fire buckets can be used filled with water on Class A fires, or with sand to use as an absorbing agent on spilled flammable liquids (Class B). They must not be used with water on burning fat or oil or on electrical appliances.

Can you use a Class B fire extinguisher on a kitchen fire?

Kitchen Fire Safety

Fire extinguishers are marketed for use on residential kitchen fires and carry a Class B rating. These types of fire extinguishers generally use high-volume, low-velocity delivery of the extinguishing agent to prevent splattering and spreading of the burning liquid grease.

When choosing extinguishers to fight a Class B fire do not use?

When fighting a Class B fire, do not use water. In many cases, water will only spread the fuel around and create more fire. To extinguish a Class B fire, you want to cut off the oxygen. You can use carbon dioxide gas to dilute the oxygen available and stop the burning.

What is B Class A fire extinguisher used for?

Fire extinguishers with a Class B rating are effective against flammable liquid fires. These can be fires where cooking liquids, oil, gasoline, kerosene, or paint have become ignited. Two commonly used chemicals are effective in fighting these types of fires.

Which type of fire extinguisher must not be used in case of electrical based fires?

Water jet extinguishers work by spraying a jet of water at the burning materials, cooling them and preventing re-ignition. They should not be used on live electrical equipment.

TYPES OF FIRE AND FIRE EXTINGUISHERS | WHICH FIRE EXTINGUISHER TO BE USED ON WHICH CLASSES OF FIRE

Which fire extinguisher should not be used in confined spaces?

It is advised not use a CO2 fire extinguisher in a confined space, as it displaces oxygen and could lead to asphyxiation.

Which of the following is not used in fire extinguisher?

Answer: b. O2 is not used as fire extinguisher.

Can water be used on a Class B fire?

The fuel sources of class B fires (gases and liquids) can be quite volatile and cannot be extinguished by water, which will only make the fuel source spread, thus spreading the fire. That is why it is important only to use extinguishing agents and methods designed specifically for Class B fires.

Where should a Class B fire extinguisher be placed?

Class B: Workshops, storage areas, garages, warehouses, or service and manufacturing areas that contain flammable liquids or gasses. Class C: Anywhere energized electrical equipment is used.

What causes a Class B fire?

Class B fires are fires which involve flammable or combustible liquids. The presence of these liquids, which are also known as hydrocarbon fuels, represent the fuel aspect of the fire triangle (heat, fuel and oxygen) and provide the materials necessary to begin, develop and maintain a fire.

When using foam a Class B fire is extinguished by?

Foam extinguishes Class A Fires by cooling the burning material and removing the heat from the combustion triangle. Foam extinguishes Class B Fires by covering the flammable liquid with a foam blanket, thus cutting off the oxygen supply from the combustion process.

What is a Class B hazard?

In fire classes, a Class B fire is a fire in flammable liquids or flammable gases, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, or alcohols. For example, propane, natural gas, gasoline and kerosene fires are types of Class B fires.

Which extinguisher should not be used on flammable liquids?

Never use a water extinguisher on electrical fires or any fire involving a flammable liquid. As any science student will tell you, water conducts the current. If you spray water onto an electrical fire, inadvertently or intentionally, you risk electrocuting yourself.

Can a Class B fire extinguisher put out a grease fire?

Other ways to put out grease fires…

Use a class B or BC or ABC fire extinguisher. A Fire Extinguisher will release a-lot of pressure, so start at a distance away and move towards the fire, rather than up-close spraying directly on to the burning grease which could tip the pan and spread the fire.

Which of these will qualify for Class B fire?

Class B fires involve flammable and combustible liquids such as gasoline, alcohol, oil-based paints, lacquers. Therefore, extinguishers with a B rating are designed to extinguish fires involving flammable and combustible liquids.

What is a BC fire extinguisher not good for?

Class ABC fire extinguishers are designed to be used on all classes of fires except Class D fires. Class BC fire extinguishers are designed to be used on flammable liquid and electrical fires only.

What type of fire is class B?

Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.

Why can't fire extinguishers be on the floor?

That's a good thing: dropping an extinguisher can weaken the outer casing or damage operable parts, such as handles. In addition to accessibility issues, fire extinguishers placed on the floor may be more susceptible to corrosion.

Which is a commonly used method of extinguishing Class B fires quizlet?

Halon 1301 and Halon 1211 are most commonly used as extinguishing agents for Class B and Class C fires.

What types of fires should you not use water on?

APWs are designed for Class A (wood, paper, cloth) fires only. Never use water to extinguish flammable liquid fires. Water is extremely ineffective at extinguishing this type of fire, and you may, in fact, spread the fire if you try to use water on it. Never use water to extinguish an electrical fire.

Can you use a fire extinguisher on an electrical fire?

There are different types of fire extinguishers that are used for different kinds of fires and all of them are highly dependent on what kind of material is being burned. In the case of electrical fires, also known as energized electrical fires, a class C fire extinguisher is needed to put it out.

On which of the following types of surfaces should a Class A fire extinguisher to be used Mcq?

Class A : This is suitable for cloth, wood, rubber, paper, various plastics, and regular combustible fires. Class A fire extinguishers are designed to put out fires that have started from household items that are made out of materials that will quickly ignite.

Which extinguisher is used for metal fire?

Thus, it is imperative that only a Class D fire extinguisher is used to extinguisher a combustible metal fire. The best way to extinguish these fires is by smothering them & eliminating the oxygen element. The agent also helps to absorb the heat from the fuel.

In which of these circumstances should you not use a water extinguisher?

Despite being one of the first elements you might think of for tackling a fire, water extinguishers are limited in their use only to Class A fires. This is any blaze involving wood, fabrics, paper, plastics and coal. Under no circumstances should they be used on electric of flammable liquid fires.

What type of fire extinguisher is not suitable for a materials fire eg paper and general waste?

CO2 is an asphyxiant if used in confined spaces and cannot be used on solid fuel fires such as wood, paper or textile.