first tn human resource agency fire extinguisher traininghow to use a fire extinguisher effectively...

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First TN Human Resource Agency

Fire Extinguisher Training


How Fires Start and Keep Burning

OXYGEN

FUEL

HEAT

• The first element required for a fire to get

started is oxygen.

• Next, some sort of fuel is required, such as

wood, paper, or gasoline.

• For the chemical combustion reaction to take

place, the fuel has to be heated to its ignition

temperature by some outside source.

• Once ignited, the heat of the flame keeps the

fuel at the ignition temperature, so it will

continue to burn as long as there are fuel and

oxygen.

• This combination of heat, oxygen, and fuel

working together creates a chemical chain

reaction called combustion.


Class A Fires

• Wood

• Paper

• Cloth

• Plastic

• Garbage



Class B Fires

• Gasoline

• Oil

• Solvents

• Grease



Class C Fires

• Appliances

• Switches

• Panel boxes

• Power tools



Class D Fires

• Magnesium

• Titanium

• Potassium and sodium

• Pyrophoric materials



Class K Fires • Cooking oil

• Fat



Extinguishing Fires

You must remove one of these:

• Heat-The best way to remove heat from an ordinary fire is to dump water on the fire.

• Oxygen-To remove oxygen, you can smother a fire so that it is not exposed to air.

• Fuel- Removing fuel is the most difficult way to extinguish a fire because fuels are usually everywhere. In most cases, the fuel will only be removed once the fire burns it all up.

HEAT

CHAIN REACTION

FUEL

OXYGEN


Water Extinguishers

• Use water on Class A fires ONLY



Dry Chemical Extinguishers

• Best all-around choice

• Class BC-rated

• Class ABC-rated



Carbon Dioxide (CO2) Extinguishers

• Class BC-rated

• Good choice for electronics

• Must be used at close range



Metal/Sand Extinguishers

• Class D-rated

• Powdered copper

• Sodium chloride

• Air-tight crust



Halon Extinguishers

• Class B and C fires only

• Leaves no residue

• Limited range

• Expensive to maintain



Halotron I Extinguishers • Replaces Halon

• Ideal for electronics/clean rooms

• Class BC-rated



FE-36 Extinguishers

• Halon/Halotron I replacement

• Less toxic

• More ozone friendly

• Class BC-rated



Water Mist Extinguishers

• Class AC-rated

• Safety from electrical shock

• Reduces scattering

• Good choice for hospitals and clean rooms



Fight-or-Flight Decision

When a fire occurs, you have to make a fight-or-flight decision. Only attempt to use an extinguisher if you can say “yes” to every point on this slide and the next slide. If these conditions have not been met, do not fight the fire yourself—evacuate the area.

Here are the conditions under which you may safely use an extinguisher:

• The fire alarm has been activated.

• The fire department has been called.

• The fire is small, contained, and not spreading beyond its starting point.

• The smoke is not bad. You can easily stay low and avoid the smoke.



Fight-or-Flight Decision

• The nearest exit is clear so that you can easily evacuate if the fire suddenly increases in size.

• The correct extinguisher for the class of fire is nearby.

• You have been trained to use a fire extinguisher correctly.


How to Use a Fire Extinguisher Effectively

• Pull the pin at the top of the extinguisher. The pin keeps the handle from being accidentally pressed when the extinguisher is not in use.

• Aim the nozzle toward the base of the fire. Stand 8 to 10 feet from the fire. Note that some types of extinguishers require you to be closer.

• Squeeze the handle lever to discharge the extinguisher. When you release the handle lever, the discharge will stop. Keeping the lever squeezed will result in a continuous flow of extinguishing agent. Squeezing and releasing the lever will result in short bursts of extinguishing agent.

• Sweep the nozzle back and forth toward the base of the fire as you squeeze the handle lever. After the fire appears to be out, watch it carefully, since it might reignite.

p a s s


To take the required Fire Extinguisher training

quiz please click the following link: Training Test

You will need to enter the following access code.

Access code: FTHRA

http://www.classroomclipboard.com/614789/Test/6E9C10A59DA446DFA870D90DB0D9C50B



first tn human resource agency fire extinguisher traininghow to use a fire extinguisher effectively...

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