(a) What does a Fire Brigade do when it arrives at a place where a building is on fire.
(b) Describe one method of putting out a fire caused by burning wood or paper.

(a) When the fire brigade arrives at the rescue, the fireman throws a strong stream of water on the building on fire, the burning material get cooled down to below their ignition temperature and fire is extinguished. The water vapour produced by the action of the heat of the fire on water surrounds the burning material and helps in cutting off the supply of air.

(b) Water extinguishes heat by cooling down the burning substance such as wood and paper. When water is thrown on these substances, it gets cooled below its ignition temperature and also stops burning. The water vapour produced by the action of the heat of the fire on water surround the burning material and help in cutting off the supply of air.

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Updated on: 10-Oct-2022

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