Which one of the four types of extinguishers most commonly used should not be found in a chemical laboratory?

Which one of the four types of extinguishers most commonly used should not be found in a chemical laboratory?

Water fire extinguishers should not be used in any science laboratory. ABC, gas discharge fire extinguishers contain halogenated gases and have names such as Halon or Halotron. These fire extinguishers are suitable for Class A, B, and C fires but are very expensive.

Is ABC fire extinguisher OK for kitchen?

For the kitchen it’s generally recommended to have a multi-purpose fire extinguisher, such as one for Class A-B-C fires, or one that can specifically handle Class B or K fires.

Which fire extinguisher is banned?

Under the Montreal Protocol Halon 1301, Halon 1211 and Halon 2402 are widely banned with some exceptions.

Are you supposed to shake a fire extinguisher?

Some manufacturers recommend shaking or inverting and patting the bottom of your dry chemical extinguishers once a month to prevent the powder from settling/packing. Dry chemical fire extinguishers require regular professional maintenance at 6 and 12 year intervals.

What kind of extinguishers are ABC?

ABC fire extinguishers are considered “tri-class” or “multi-purpose” extinguishers which can be used on Class A, B, or C fires. Every fire extinguisher has an alphabet rating that tells you what types of fires it can extinguish.

Which extinguisher is not for flammable liquids?

Water extinguishers
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.

Why are there different types of fire extinguishers?

For each class of fire, the fuel, heat source and chain reaction varies, which is why there must be different types of fire extinguishers depending on the class of fire. For instance, while a class A fire can be safely extinguished with water, a class C fire cannot, as water would conduct the electricity and risk harm to the operator.

How does a wet chemical extinguisher work?

The wet chemical extinguisher is a specialized type primarily focused on class K fires, those involving cooking media such as animal and vegetable fats or oils. These extinguishers contain a solution composed of potassium that effectively launches a two-pronged assault on fires. First, the liquid mist it sprays acts to cool the fire.

Can you use a water extinguisher to put out an electrical fire?

Because water is conductive, though, using a class-A extinguisher to fight an electrical fire could result in electrocution. A class-A unit also is the wrong tool to use for extinguishing a flammable-liquid fire; the pressurized stream of water it shoots can propel a burning liquid toward a new source of fuel.

What is a Class B fire extinguisher used for?

Works For: Class A, B and C fires (multi-purpose); Class B and C (ordinary) This extinguisher removes heat and creates a barrier between oxygen and fuel so a fire cannot be re-ignited. The chemical is sprayed as a mist, cooling the fire’s heat and creating a blanket effect over the fuel.