What is a disadvantage of multi class dry chemical fire extinguishers OSHA? Disadvantages: Obscures vision . More irritating than ordinary dry chemical. Nozzle pressure may cause burning liquids to splash.
What are the disadvantages of fire extinguisher?
- should not be used in confined spaces as it is an asphyxiant gas.
- has limited cooling properties.
- offers no protection against reignition.
- a non insulated horn can cause frost burn if the user touches it when in use.
- other types of extinguishers will still be required for other types of fires.
What is a disadvantage of multi class dry chemical fire extinguishers?
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.
Which is the primary disadvantage of using dry chemical portable fire extinguishers?
What are the advantages and disadvantages of ABC, dry chemical fire extinguishers? The multi-purpose chemical, monoammonium phosphate, is corrosive and damages computers and electronic equipment . The corrosive action may be slow and not evident for several months.
What is a disadvantage of carbon dioxide fire extinguishers OSHA?
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.
Why is CO2 better than dry chemical for fighting a Class C fire?
CO2s are designed for Class B and C (flammable liquid and electrical) fires only. Carbon Dioxide is a non-flammable gas that extinguishes fire by displacing oxygen , or taking away the oxygen element of the fire triangle.
What kind of fires is ABC extinguisher not good for?
Do not use on Class B or C fires ; may cause fire spread or electrical shock. ABC fire extinguishers are located throughout the Medical Centers in corridors.
When should you not use a CO2 fire extinguisher?
Carbon dioxide fire extinguishers, when used in the right circumstances can save lives. However, it would be dangerous to use a carbon dioxide fire extinguisher when dealing with flammable gases, cooking oils and fats , or in a confined space.
What are the 4 types of fire extinguishers?
There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire. Multipurpose extinguishers can be used on different types of fires and will be labeled with more than one class, like A-B, B-C or A-B-C.
What are the disadvantages of dry chemical fire extinguisher?
- Rarely allowed by the fire brigade as the primary extinguishing agent for professional use (foam and powder are allowed)
- Not frost-resistant.
- Limited use (only class A)
- Not suitable for use near electrical installations or equipment (risk of electrocution.
What is the best fire extinguisher for petrol?
Foam fire extinguishers can be used on Class A and B fires. They are most suited to extinguishing liquid fires such as petrol or diesel and are more versatile than water jet extinguishers because they can also be used on solids such as wood and paper.
Which fire extinguisher should not be used in a confined space?
When a CO2 extinguisher is used in a confined space there is danger that the user may become overwhelmed by the sudden increase in carbon dioxide emissions.
How do I know if my fire extinguisher is still good?
Rubin recommends checking the pressure gauge monthly . “If the needle is in the green area, it’s functional,” he says. If it falls anywhere else, the extinguisher is unreliable and should be serviced or replaced. For an older model without a gauge, have it checked by a pro.
Can CO2 put out fire?
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.
Is CO2 fire extinguisher good for home?
In most cases, no. CO2 fire extinguishers are most frequently recommended for offices, retail shops, schools, hospitals, etc. Their main purpose is to extinguish electrical fires. However, CO2 extinguishers are effective against Class B fires involving flammable liquids .
What is the only class of fire that should be extinguished with water?
Water extinguishers are for Class A fires only; they should not be used on Class B or C fires. The discharge stream could spread the flammable liquid in a Class B fire or could create a shock hazard on a Class C fire.
