Block Vi - Firefighting Fundamentals

Front 1

FIRE TRIANGLE

Back 1

The fire triangle is made up of oxygen, heat and fuel.

Note: Take away fuel, there will be no fire.

Front 2

FIRE TETRAHEDRON

Back 2

The fire tetrahedron is made up of oxygen, heat, fuel, and chemical chain reaction.

Front 3

FOUR CLASSES OF FIRE

Back 3

Class Alpha
Class Bravo
Class Charlie
Class Delta

Front 4

CLASS ALPHA FIRE

Back 4

Occur in combustibles materials that produce an ashsuch as burning wood and wood products, cloth, textiles and fibrous materials, and paper produvts. Effective extinguishing agents are water (H2O) or Aqueous Film Forming Foam (AFFF).

Front 5

CLASS BRAVO FIRE

Back 5

Occur with flammable liduid substances such as gasoline, jet fuels, oil, and other petroleum based products. Effective extinguishing agents are AFFF, Halo 1211, Purple K Powder (PKP) and Carbon Dioxide (CO2).

Front 6

CLASS CHARLIE FIRES

Back 6

Are energized electrical fires that are attacked by using non-condutive agents. Effective extinguishing agents are:

- Energized. CO2, Halon, PKP, and H2O in fog patterns with a minimum distance of 4 feet.

- De-energized. Treat as a Class A, B, or D fire.

Front 7

CLASS DELTA FIRES

Back 7

Combustible metals such as magnesium and titanium. Effective extinguishing agents are H2O in large quantities in high velocity for, apply water from a safe distance or from behind sheleter as small explosions can occur.

Front 8

AQUEOUS FILM FORMING FOAM (AFFF)

Back 8

AFFF liquid concentrates consist primariyl of synthetic fluorocarbon surfactant materials that are noncorrosive and have an unlimited shelf life when stored in a protected area. Three-percent and six-percent AFFF concentrate is approved for naval use. Current shipboard equipment requires six-percent concentrate.

Front 9

WATER (H2O)

Back 9

Water us bit generally considered to be a suitable agent for use in combating large aircraft fuel fires without the addition of either foam agents or surfactants. It has the ability, when properly applied, to cool the aircraft fueslage and provide a heat shield for personnel. Water is also an effective agent for cooling ordnance, batteries, and Class A fires.

Front 10

HALON 1211

Back 10

(Bromochlorodifluoromethane) Intended primarily for use on Class B and C fires; however it is effective on Class A fires. Halon 1211 is a residue to clean up. Halon 1211 extinguishes fires by inhibiting the chemical chain reaction of the combustion process.

Front 11

CARBON DIOXIDE 15-PUND PORTABLE UNITS AND 50-PUND WHEELED EXTINGUISHERS UNITS

Back 11

These units are intended primarily for use on Class B and C fires. CO2 is a colorless, odorless gas that is approximately one and one-half times heavier than air. Fire suppression is accomplished by the displacement of toxygen to below the level that is required to support combustion.

Front 12

POTASSIUM BICARBONATE (PURPLE-K-POWDER OR PKP).

Back 12

PKP is intended primarily for use on Class fires. The Principal chemical in PKP is potassium bicarbonate and the dry chemical extinguishes the flame by breaking the combustion chain. It does not have cooling capaabilities, therefore it will not result in permanent extinguishing (reflash protection) if ignition sources are present.