water
Assuming the fire is caused by an electrical problem, you would need a class c extinguisher.
A vacuum is nothing. A nothing can't burn, so there is no need to put it out. If you are talking about a vacuum cleaner (electrical appliance) on fire, that is an energized electrical fire, which is a Class C fire. You will need a UL class C rated fire extinguisher for this emergency (i.e., ABC, B:C, or C). If you can unplug the vacuum safely, then do so. This converts the fire from Class C to "ordinary combustibles", UL Class A.
A type b extinguisher puts out a class B fire, i.e., flammable/combustible liquids and gases.
A controlled fire would be easier to aim at, so a candle.
Baking Soda & Class-C or ABC Fire ExtinguisherIf a fire extinguisher is not available and the fire is small, dousing it with enough baking soda can put it out. If you have one, use a class-C or multi-purpose ABC fire extinguisher to put out the flames. You can not use any other kind of fire extinguisher on an electrical fire (the extinguisher should be clearly marked, but if it's not and you're not sure what kind it is, don't use it)NEVER-EVER-EVER-use water on an electrical fire as it could cause electrocution-use a class-A fire extinguisher on an electrical fire.
Burning liquids such as gasoline, kerosene, paint, acetone, and so on.
A "Class A" fire- ordinary combustibles, such as wood, cloth, or paper. If it leaves an ASH, its an A.
A class A extingquisher is intended to put out things that when burned, leave an ash--hence class A. They are usually some form of liquid or plain water. A class B fire is a liquid fire and using a class A extingquisher will only add volumn to the liquid that is burning making it a larger area to put out. With a class B fire you need something that will smother the fire without making it spread out even farther.
A fire extinguisher should be used to put out a fire safely in a laboratory. It is essential to know the type of fire extinguisher suitable for the specific type of fire, such as Class A, B, or C fires, to effectively extinguish the flames.
Extinguish means "put out", so a fire extinguisher puts out fire.
a fire extinguisher can put out a fire
Correct as they may not displace enough O2 to put the fire out-causing it to reignite.