Why not use a BC extinguisher on a Class A fire?

Can BC extinguisher be used on a?

Most BC extinguishers are made from bicarbonate salts, which can smother a flame, but not the embers. “In addition to effectiveness on class B and C fires, it will have some effect on the flaming stages of a class A fire but no effect on the ember or deep seated stages of a class A fire.”

What is a BC fire extinguisher not good for?

What kinds of fires is a B:C extinguisher not good for? Wood, paper and cloth.

Which extinguisher would be ineffective on a class A fire?

Water Extinguisher – Red body with a contrasting red band running around the top – These are best for fires involving organic solid materials such as wood, cloth coal etc, specifically Class A Fires. They are ineffective, and potentially dangerous for Class B, and Electrical Fires.

What type of fire extinguisher is used on a class A fire?

Multipurpose Dry Chemical: Multipurpose dry chemical fire extinguishers are effective for Class A fires, as well as Classes B and C. The agent in these types interrupts the chemical reaction in the Fire Triangle (fuel, oxygen, heat plus a chemical reaction) to extinguish a Class A fire.

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Can you use BC fire extinguisher on wood?

There are a great many different types of fire extinguishers, but they are used to fight 5 major types of fire: Class A-used for wood and paper, solid materials that turns to Ashes. Class B – Used for fires in liquids, liquid materials that Boil.

Can you use a BC fire extinguisher on burning wood?

ABC Fire Extinguishers use monoammonium phosphate, a dry chemical with the ability to quickly put out many different types of fires by smothering the flames. This pale, yellow powder can put out all three classes of fire: Class A is for trash, wood, and paper. Class B is for liquids and gases.

Can you use a Class B and C fire extinguisher on a Class A fire?

They contain an extinguishing agent and use a compressed, non-flammable gas as a propellant. … Water These extinguishers contain water and compressed gas and should only be used on Class A (ordinary combustibles) fires. Carbon Dioxide (CO2) extinguishers are most effective on Class B and C (liquids and electrical) fires.

Do not use carbon dioxide extinguishers on Class A fires?

Carbon dioxide extinguishes work by displacing oxygen, or taking away the oxygen element of the fire triangle. … CO2s may be ineffective at extinguishing Class A fires because they may not be able to displace enough oxygen to successfully put the fire out. Class A materials may also smolder and re-ignite.

What happens if you use the wrong fire extinguisher?

The dangers of using the incorrect fire extinguisher:

Many of these types of metal burn better in carbon dioxide than in air, so applying a carbon dioxide fire extinguisher could make the fire worse. Applying water to a metal fire could cause hydrogen to be given off resulting in an explosion.

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Which extinguisher is not for flammable liquids?

Water extinguishers are used on Class A fires involving solid combustibles. They are not suitable for fires fuelled by flammable liquids or where electricity is involved. Foam is a versatile fire extinguisher which can be used for Class A and B fires. The foam agent helps to prevent re-ignition.

Which is a disadvantage of CO2 extinguishers?

Because of this, CO2 has been and is being used for fire protection in a number of hazard situations. One drawback to using carbon dioxide, however, is that its mechanism of fire suppression is through oxygen dilution, and not, as is the case for halon, through chemical disruption of the catalytic combustion chain.

What are the limitations of fire extinguisher?

The Limitations of Portable Fire Extinguishers

  • A 10 lb. extinguisher has 17-21 seconds of discharge time.
  • A 35 lb. extinguisher has less than 1 minute of discharge time.
  • Small extinguishers only reach a distance of about 5 feet.
  • Larger extinguishers may only reach up to 20 feet.

What is BC class fire extinguisher?

Regular (BC) Dry Chemical Fire Extinguishers extinguishers contain a siliconized sodium bicarbonate based dry chemical with free flowing and non-caking additives.