Question

Electrical fires cannot be safely put out by dousing them with water. However, fire extinguishers spray carbon dioxide on the firework very effectively because it forms a blanket around the burning material.
But these carbon dioxide extinguishers cannot be used for wood fires. Why?
A. The carbon dioxide blanket itself acts as a fuel and starts burning along with the wood.
B. The extinguished wood can retain enough heat inside the carbon dioxide blanket to re-ignite when the gas dissipates.
C. In the presence of carbon dioxide from the extinguisher, the burning wood reacts with oxygen to release heat and make the fire worse.
D. Carbon dioxide reacts with the wood to give carbon and oxygen; the oxygen makes the fire worse and the carbon burns along with the wood.

Answer 1

Answer:

Water extinguishers are one of the most cost-effective ways to fight Class A fires, those fuelled by solid materials such as paper, wood and textiles.

There are four different types of water extinguishers: water jet, water spray, water with additives and water mist or fog.

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