effectiveness matters
water, helium and water vapor.
Class A
Fire extinguishers commonly contain water under pressure, compressed carbon dioxide, foam, or specialized dry chemicals, depending on the type of fire they are designed to put out.
ಠ_ಠ Water, fire extinguishers, other liquids(besides grease or flammable liquid IE Gasoline), and what ever you can try that will not kill you.
Carbon dioxide fire extinguishers are generally used because they absorb the oxygen content present in the air and thus help in extinguishing fire.
Nitrogen can be used in fire extinguishers as gas propellant.
Some fire extinguishers use dry chemicals and some use a foam to extinguish flames. Some fire extinguishers actually still use water, but they're only for use on smaller fires. Others use a dry chemical, mostly sodium bicarbonate, or Carbon Dioxide.
Class A
FIRE extinguishers are used to put out fire.
You can get fire extinguishers recharged at fire equipment companies, some hardware stores, and fire departments.
No, there are boats that do not need any fire extinguishers.
A fire extinguisher cools down or extinguishes a fire. There are five types of fire extinguishers used in the US.