They normally take a tanker truck to homes in countryside.
The same way we do, they use water.
No, flour should not be used to extinguish fires as it can actually make the fire worse by creating a dust explosion. It is safer to use a fire extinguisher or water to put out a fire.
Water conducts electricity; therefore, using water to extinguish an electrical fire can result in electrocution.
Water is a conductor of electricity, and carries the electrical current. That being said, there is always a risk for electrocution when attempting to extinguish an electrical fire using water.
You do not use water to extinguish fuel fires. Water will only spread it.
It depends what the fuel source is ! Water can extinguish even large forest fires - if you use large enough quantities of it !
No, water vapor does not burn. In fact, water vapor is often used to extinguish fires by removing heat and lowering the temperature.
Those are class D fires. They can be very hard to extinguish, and require that they be buried or a special extinguishing agent be used. Those fires are not affected by water.
Fires involving flammable liquids (Class B fires), such as gasoline or oil, should not be extinguished with water, as it can spread the flames. Electrical fires (Class C) are also dangerous to extinguish with water due to the risk of electrocution. Additionally, fires involving reactive metals like sodium or potassium (Class D fires) can react violently with water, making it ineffective and hazardous.
it has to be smothered or burned up
It depends what the fuel source is ! Water can extinguish even large forest fires - if you use large enough quantities of it !
That's correct. Water can react with flammable liquids, spreading the fire instead of extinguishing it. It is best to use a fire extinguisher specifically designed for flammable liquid fires, such as a foam or CO2 extinguisher, to put out these fires effectively.