Thoughtless use may lead to the powder causing more damage than the fire itself, using dry powder fire extinguishers in kitchens or offices as powder can contaminate food and inhibit the use of electrical components such as keyboards if discharged.
What are the disadvantages of dry chemical fire extinguisher?
Disadvantages: limited to class A fires only. leaves a small amount of residue after the fire has been extinguished. water is an electrical conductor, making the extinguisher unsuitable if the class of fire has an electrical supply, or for use near live electrical equipment.
What is a disadvantage of multi class dry chemical fire extinguishers that are not multipurpose?
Disadvantages: Obscures vision. More irritating than ordinary dry chemical. Nozzle pressure may cause burning liquids to splash.
What is the biggest disadvantage to dry chemical systems?
Disadvantages of a Dry Chemical Fire Suppression System
You must have your system recharged after it is activated in order for the system to work again. Because these systems pump out a lot of agent to extinguish the fire, extensive cleanup is required after each use.
What are the disadvantages of fire extinguishers?
– Only once can be used. – Not suitable for combustion of electrical and metallic tools. – Cannot be placed where the temperature is cold and can freeze. – Cannot control and remove large fires.
What is the main disadvantage of a multi purpose fire extinguisher?
Reduces visibility when discharged, so consideration required when placing near escape routes, stairwells, etc. May aggravate respiratory conditions when discharged. Limited cooling properties. While Powder is safe for use on electrical fires, it can cause corrosion.
What are the disadvantages of fire?
Disadvantages: Fire can cause soil damage, especially through combustion in the litter layer and organic material in the soil. This organic material helps to protect the soil from erosion. When organic material is removed by an essentially intense fire, erosion can occur.
Why is the dry chemical fire extinguisher unsuitable for use near sensitive electrical equipment such as computers?
If you have sensitive electronic equipment, such as in a computer room or data center, using a water or a dry chemical fire extinguisher can cause as much damage as a fire itself. … It does not conduct electricity and is suitable to fight Class A, B, and C fires.
What is a disadvantage of using a water fire extinguisher?
Disadvantages Of Water Extinguishers
Do not use on electrical fires due to shock hazards. Using water fire extinguishers for fat and also flammable liquids will aggravate the fire.
What is a disadvantage of carbon dioxide fire extinguishers reflash?
Disadvantages Of Carbon Dioxide Extinguishers
As CO2 works by displacing the oxygen around the fire, it is not suitable for outdoor use, or in environments exposed to windy conditions. CO2 is a high pressured extinguisher. Using it on class A fires or class F fires could cause the fire to spread.
What is a disadvantage of carbon dioxide fire extinguishers OSHA?
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 is dry chemical fire suppression system?
Dry chemical fire systems
Dry chemical powder is intended for use in extinguishing fires involving bulk chemical agents and liquefied gases. … The system includes detectors, a control unit, agent storage cylinders, piping and discharge nozzles.
What is the advantage of using a dry chemical fire extinguisher?
Dry chemical fire extinguishers do not need to be discharged heavily over the area to put a fire out. A small amount of extinguishant is enough to stop an average sized residential, commercial or industrial fire. The coverage of extinguishant that is sprayed out from a dry chemical power extinguisher is large.
What are dry powder extinguishers used for?
Dry powder extinguishers smother fires by forming a barrier between the fuel and source of oxygen. The label colour for this type of extinguisher is yellow. Wet chemical extinguishers can also be used for fires caused by various organic materials including wood, coal, textiles, fabrics, cardboard and paper.
When should you not use a dry powder fire extinguisher?
A dry powder fire extinguisher is not to be used in any of the following situations:
- Class F fires; cooking fires, such as chip pan fires.
- Fires that are in enclosed spaces.
- Fires that involve electrical equipment which is over 1000v.