D. Give reason for the following.
1. Never throw water to put off an electric fire.
2. Cover a person in a blanket if his/her clothes catch fire.
3. Electric switches should not be operated in case of a gas leak.
4. Damaged electric wires should be replaced.
Answers
Explanation:
(1) Water is a very good conductor of electricity, by throwing water at an electric fire, you may get shocked by the electricity and receive burns or serious injuries.
(2) To burn, fire needs an open source of O2, by covering the person with a blanket, we are cutting of the source of O2 and the fire will quickly stop
(3) This is as electric switches release sparks why being switched on and off which might ignite the gas and cause an explosion.
(4) Damaged electric wires might break which might cause a short circuit.
Answer:
*You should never throw water on an electrical fire because water conducts electricity and you could be electrocuted. . If you don't have a fire extinguisher, you can use baking soda to extinguish an electrical fire.*
2 *As the fire blanket completely surrounds the person whose clothes caught fire, it seals the person's body surface around the fire and cut's off the oxygen supply to the fire, thereby putting it out. Hence fire blanket acts as a fire extinguisher and stops the fire from spreading*
3*
We should not operate any electrical switches when there is a gas leak because the electrical switches generate sparks while being switched on and off.*
4*Faulty electrical wiring does not only cause fires but could also result in electrocution if you touch an exposed wire. When unconcealed wires come into contact with combustible materials, they can easily cause fatal fires.*