What does the letter B on a B-1 fire extinguisher indicate quizlet?

What does the letter “B” on a B-1 fire extinguisher indicate? The type of fire it is designed to extinguish. What should you do before an inboard gasoline engine? Operate the blower for at least four minutes.

What is a Type B-1 fire extinguisher?

B-1 Extinguishers are USCG approved and meet the need for a Type B, Size 1 USCG approved Fire Extinguisher. Amerex B-I Fire Extinguishers must be: Dry Chemical, ABC, or Purple K: 2 lbs or larger. Carbon Dioxide (Co2): 5 lbs or larger.

What Is in a Class B fire extinguisher?

Because of this, Class A fire extinguishers use water, while Class B fire extinguishers use dry chemicals (foam or powder), such as aqueous film-forming foam, multi-purpose dry chemicals such as ammonium phosphate, and halogenated agents (such as Halon 1301 and Halon 1211) or highly pressurized carbon dioxide.

What is the symbol for a Class B fire?

Class B fires involve flammable or combustible liquids such as gasoline, kerosene, grease and oil. The numerical rating for class B extinguishers indicates the approximate number of square feet of fire it can extinguish. The geometric symbol indicating Class B is a red square.

How do you fight Class B fire?

To extinguish a Class B fire, you want to cut off the oxygen. You can use carbon dioxide gas to dilute the oxygen available and stop the burning. Smothering the fire with bicarbonate (baking soda) or potassium carbonate will also work.

Which extinguishes fire more quickly hot or cold water?

Fire extinguishing involves absorption of heat and the absorption of heat in converting hot water to steam is very much more than the heat absorbed in heating cold water to the boiling temperature. Hence boiling water can extinguish fire more quickly than hot water, ice or cold water.

Do firefighters use hot water?

Using water is one common method to extinguish a fire. Water extinguishes a fire by cooling, which removes heat because of water’s ability to absorb massive amounts of heat as it converts to water vapor.

Can you put out fire with hot water?

Interestingly, steam from hot water can smother fires out, but both cold and hot water, if sprayed to make contact with the burning mass, will put out the fire.

Which extinguishes fire more quickly?

Boiling water can extinguishes fire more quickly. The hot water sprinkled on the burning material is not only for cooling, but also for reducing the oxygen around it with converted steam. Cold water to absorb a lot of heat.

Does cold water put out a fire faster?

Although it is true that technically cold water will put out a fire faster than hot water, most of the cooling effect comes from changing the water into steam, not from raising the temperature of the water. In fact there’s less than a 1% advantage in using cold water.

Why is boiling water better extinguisher than cold water?

The process of fire extinguishing involves absorption of heat. Absorption of heat in converting hot water to steam is more than heat absorbed in heating cold water to the boiling temperature. Hence, hot water extinguishes fire more quickly than cold water.

How do you put down a fire?

Smother the flames with baking soda. Avoid flour or sugar, which can lead to a dynamite-like explosion. Reach for a dry chemical fire extinguisher (a class K extinguisher will also work, but these are usually found in commercial kitchens).

What does a blue flame signify?

A blue flame colour means complete combustion. This indicates that the gas is being burned efficiently without any unburned and wasted gas. With complete combustion you get the maximum heat output from your gas and use less gas to generate heat with whatever appliance you are using.