6. Why does a burning candle go out when you blow on it?
7. Spraying water is not a good way of putting out an oil fire
or an electrical fire. Why not?
8. What are some of the things you should do to prevent a
fire at home and in the school?
Answers
Answer:
6. ans- When we blow on burning candle, we remove the hot air around the flame. Thus, we bring down its temperature below the flash point. Then the candles goes out.
7. oil fire cannot be put out by spraying water on it .The reason is that the oil floats to the top of water and continues to burn. Secondly it can flow quickly carrying the burning oil. Thus the fire spreads. Water should not be used for electrical fire. Water is a good conductor of electricity so the person spraying water can get electric shock and be killed.
8. keep the gas cylinder at or save distance. check that the tube from time to time. the fuel smell of the leaking gas should be tackled at the earliest.
The school and office buildings often catch fire because of electric circuits.So we should avoid overload and replace old wires . The electric fuse and MCB. Should also be check from time to time.
We must not keep inflammable or combustible things like kerosene and petrol in our homes.
Fire extinguisher be installed in high rise buildings.
Answer:
6. When we blow air on a burning candle, we remove the hot air around the flame. In this way, we reduce its temperature below the flash point. Thus, the candle goes out.
7. If water is sprayed onto an oil fire, then the oil will float to the top of the water and continue to burn. This can be very dangerous because water can flow quickly, carrying the burning oil with it and spreading the fire. ... Therefore, spraying water is not a good way of putting out an oil fire or an electrical fire.
8. Some of the things you should do to prevent a
fire at home and in the school are as following
1) Fit smoke alarms and fire extinguishers in homes and schools. 2) Take care before you leave the gas-stove unattended. 3) Non-cooking equipment such as plastic, towel etc must be kept away from the gas-stove. 4) Electrical appliances such as room heaters should be kept away from furnishings and flammable items.