Types of Fire Extinguishers and Their Uses
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Questions and Answers

What is the advantage of using carbon dioxide as a fire extinguisher?

  • It causes the combustion of materials rather than extinguishing the fire.
  • It is less effective on electrical fires compared to other types of fires.
  • It is cheaper than other types of fire extinguishers.
  • It is lighter than air and surrounds the burning substance like a blanket. (correct)

    • How does a foam-type fire extinguisher work?

  • It contains pure water to put off fires by cooling down the flame.
  • It creates a barrier between the fire and oxygen, preventing combustion.
  • It is filled with a saturated solution of sodium bicarbonate and aluminium sulphate to suppress fires. (correct)
  • It releases oxygen to support the combustion process and extinguish fires.

    • Why is sand mentioned as an option to put off fires?

  • To release carbon dioxide and cool down the flames.
  • To absorb heat and smother the fire by cutting off the oxygen supply. (correct)
  • To react with the burning material and create a non-combustible compound.
  • To create a barrier between the fire and oxygen.

    • Which statement best describes the function of pouring water over a burning body?

    <p>Water cools down the body to prevent combustion at high temperatures.</p> Signup and view all the answers

    Why is carbon dioxide considered effective for fires involving electrical inflammable materials?

    <p>It is lighter than air and easily penetrates electrical components to extinguish fires.</p> Signup and view all the answers

    How does carbon dioxide differ from water in terms of extinguishing fires?

    <p>Carbon dioxide cuts off the oxygen supply, while water directly reacts with burning material to stop combustion.</p> Signup and view all the answers

    Why is water effective as a fire extinguisher?

    <p>Water creates a barrier of water vapor around the combustible material, cutting off the air supply.</p> Signup and view all the answers

    Why can't water be used to extinguish fires caused by burning oil or petrol?

    <p>Water is lighter than oil or petrol, so it floats on top and does not extinguish the fire.</p> Signup and view all the answers

    Why is water not suitable for extinguishing fires in electric wiring?

    <p>Water conducts electricity and can lead to electric shocks or electrocution.</p> Signup and view all the answers

    How does water help in preventing the spread of fire?

    <p>By forming water vapor to cut off the air supply to the fire.</p> Signup and view all the answers

    What role does water play in a firefighting operation?

    <p>To cool down the combustible substance below its ignition temperature.</p> Signup and view all the answers

    Why is using water to extinguish fires caused by burning oil or petrol ineffective?

    <p>Water mixes with oil/petrol and creates toxic fumes.</p> Signup and view all the answers

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