write about different types of fire extinguisher and how we can use them in not more than 300 word
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Answers
Answer:
Class A – Fires that involve solid flammables and dusts, such as wood, plastics, paper and cardboard, fabric and textiles, and dusts such as grain dust and flour.
Class B – Fires that involve flammable liquids, such as gasoline, petroleum oil, paint, or diesel.
Class C – Fires that involve flammable gases, such as propane, butane, or methane.
Class D – Fires that involve combustible metals, such as magnesium, lithium, sodium, potassium, titanium, or aluminium.
Class F – Fires that involve cooking oils and fats, such as vegetable oil, sunflower oil, olive oil, maize oil, lard, or butter (typically those used for deep-fat fryers).
Although it is not recognised as a separate class of fire in Europe, electrical fires that involve live equipment and electrical sources are also a type you should bear in mind (think of it as an informal Class E; ‘E’ for electric to help you remember).
Explanation:
There are different types of fire extinguishers because there are various types of fires. Each extinguisher is suitable for fighting certain types, and it’s important for you to know the differences if its your job to fight fires at work. Being able to immediately distinguish which extinguisher you need in an emergency apart could make a lifesaving difference.
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Given
Write about different types of fire extinguisher and how we can use them in not more than 300 word
Answer
There are five main types of fire extinguishers:
Water.
Powder.
Foam.
Carbon Dioxide (CO2).
Wet chemical.
Each type is easily identifiable by their names, colours, and sometimes their hoses. Depending on their size, some may not come with a flexible hose, such as smaller foam or aqua water spray extinguishers.
Water Extinguishers
There are two types water extinguishers: water spray and dry water mist.
Standard water extinguishers
These will be solid red and will have the word ‘water’ or ‘aqua spray’ printed across them in white text. They are your classic model: they dispense water at a high pressure to extinguish flames.
Water extinguishers are only suitable for class A fires, which means they can fight fires that involve wood, cardboard, paper, plastics, fabric and textiles, and other solid materials.
Powder Extinguishers
There are three types of powder extinguisher: ABC powder, M28 powder, and L2 powder.
ABC powder extinguisher
These types of extinguishers will say ‘powder’ in white text over a blue rectangle, and underneath the rectangle will be written ‘ABC powder’.
As their name suggests, these are designed to combat class A, B, and C fires – those involving solids, liquids, and gases. The powder acts as a thermal blast that cools the flames so burning cannot continue. Due to their non-conductive nature, they are also suitable for fighting electrical fires. However, they do not effectively penetrate the spaces in equipment easily, so the fire could still re-ignite.
Foam Extinguishers
Foam extinguishers are identifiable by the word ‘foam’ printed within a cream rectangle on their bodies. They are primarily water based but contain a foaming agent, which has rapid flame knock-down and a blanketing effect. It smothers the flames and seals vapours so that re-ignition cannot occur.
Carbon Dioxide (CO2) Extinguishers
These types of extinguishers can be identified by the text ‘carbon dioxide’ or ‘CO2‘ printed in white on a black rectangle. They also have a distinct type of hose.
Carbon dioxide extinguishers are used for combating class B and electrical fires – they suffocate the fire by displacing oxygen in the air. Because they do not leave any substances behind and so minimise damage done to equipment, unlike other extinguishers, they are particularly useful for offices and workshops where electrical fires may occur.
Wet Chemical Extinguishers
These types of fire extinguishers are identifiable by the words ‘wet chemical’ printed across a yellow rectangle. It also has an extended hose that you can hold and point, which is useful when fighting fires on a kitchen top.
Wet chemical extinguishers are designed for combating fires that involve class F fires. They are effective because they are capable of stopping fires that are of an extremely high temperature, particularly cooking oils and fats. They also discharge gently, stopping the burning oils and fats from being pushed and splashing to surrounding areas or even the user.