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CO2 Fire Extinguisher

Ways to Control FireFire control and Fire Extinguisher Fire Extinguisher

Transcript

  • 0:3Oh my god! My sofa caught fire.
  • 0:7
  • 0:7What do i do now? I've got an idea.
  • 0:10
  • 0:10The best fire extinguisher here is water. If
  • 0:13
  • 0:13I pour water, the fire can be controlled.
  • 0:15
  • 0:15But what if your laptop catches fire? In
  • 0:20
  • 0:20such a case, will you pour water on the
  • 0:22
  • 0:22laptop to extinguish this fire?
  • 0:24
  • 0:24Well! You shouldn't be doing that. Now,
  • 0:27
  • 0:27because certain things are mixed in
  • 0:29
  • 0:29water, when you pour water on this
  • 0:32
  • 0:32electrical equipment, it may conduct
  • 0:34
  • 0:34electricity and harm you.
  • 0:36
  • 0:36So what should be done in such a case?
  • 0:40
  • 0:40Well, the best fire extinguisher in this
  • 0:43
  • 0:43case is carbon dioxide.
  • 0:46
  • 0:46Why is that so? Let's see the reasons
  • 0:48
  • 0:48behind it. Carbon dioxide is heavier than
  • 0:52
  • 0:52oxygen because of which it covers the
  • 0:55
  • 0:55fire like a blanket. Now, since the
  • 0:58
  • 0:58contact between the fuel and oxygen is
  • 1:0
  • 1:0cut off, the fire is controlled. The added
  • 1:4
  • 1:4advantage of carbon dioxide is that, in
  • 1:7
  • 1:7most of the cases, it doesn't harm the
  • 1:9
  • 1:9electrical equipments. But where do we
  • 1:12
  • 1:12get the supply of carbon dioxide? Carbon
  • 1:15
  • 1:15dioxide is stored under high pressure in
  • 1:18
  • 1:18cylinders in its liquid form. Just like we
  • 1:21
  • 1:21store LPG in the cylinders and we use
  • 1:24
  • 1:24it in our homes.
  • 1:25
  • 1:25Ok. When carbon dioxide is sprayed out of
  • 1:29
  • 1:29the cylinder, it expands enormously and
  • 1:31
  • 1:31comes back to its gaseous form and
  • 1:34
  • 1:34cools down at the same time. So, carbon
  • 1:38
  • 1:38dioxide not only forms a blanket around
  • 1:40
  • 1:40the fire but it also brings down the
  • 1:43
  • 1:43temperature of the fuel. So, it eliminates
  • 1:47
  • 1:47both the reasons that caused the fire,
  • 1:50
  • 1:50that is oxygen supply and the heat that
  • 1:53
  • 1:53brings the substance to it ignition
  • 1:55
  • 1:55temperature. Thus, carbon dioxide is an
  • 1:59
  • 1:59excellent fire extinguisher.
  • 2:1
  • 2:1Ok. There is another way of getting
  • 2:4
  • 2:4supply of carbon dioxide. Now, generally
  • 2:7
  • 2:7at homes, we do not have the carbon
  • 2:9
  • 2:9dioxide fire extinguisher bottle. In such
  • 2:12
  • 2:12cases, we can release a lot of dry powder
  • 2:15
  • 2:15of chemicals
  • 2:15
  • 2:15like potassium bicarbonate and
  • 2:18
  • 2:18sodium bicarbonate on the fire.
  • 2:21
  • 2:21So, sodium bicarbonate is nothing but the
  • 2:24
  • 2:24baking soda we have. When we release
  • 2:27
  • 2:27these dry powders on fire, due to the
  • 2:30
  • 2:30heat, these powders give off a lot of CO₂.
  • 2:33
  • 2:33And due to which the fire can be
  • 2:35
  • 2:35controlled. But what about situations
  • 2:38
  • 2:38where fire involves oil or kerosene? Will
  • 2:42
  • 2:42you use water in such cases to
  • 2:44
  • 2:44extinguish the fire?
  • 2:46
  • 2:46Well! Again, it will be a wrong choice. Why?
  • 2:48
  • 2:48Because water is heavier than oil. So, it will
  • 2:51
  • 2:51sink below the oil and oil will keep on
  • 2:54
  • 2:54burning on the top. So, in this situation
  • 2:56
  • 2:56too, carbon dioxide will be the best fire
  • 2:59
  • 2:59extinguisher. But there is one more thing
  • 3:2
  • 3:2that can be used to extinguish such a fire.
  • 3:5
  • 3:5For that, find out why a lot of sand is
  • 3:10
  • 3:10kept in petrol pumps.

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