Foam And Equipment

Question 1

Polar solvents def.

Answer 1

Mix with water

Alcohol acetone lacquer thinner

AR foam is needed for extinguishment.

Question 2

Three ways foam extinguishes

Answer 2

Separating- creates a barrier between fuel and fire

Cooling - lowers temp of surface ( water is released when foam breaks down)

Suppressing - prevents release of flammable vapors

Question 3

Induction Def.

Answer 3

Uses Venturi principle.

Question 4

Injection

Answer 4

External pump or head pressure is used to force foam concentrate into fire stream

Used on app. Mounted or fixed fire protection.

Question 5

Batch mixing

Answer 5

Foam concentrate pour directly into tank

Accurate form of proportioning
Simplest

Question 6

Premixing

Answer 6

Premixed barrels that can be added to app tanks or transported to scene

Common in skid mount units

Question 7

Protein based foam

Answer 7

Animal product based

Safer for environment

Question 8

Hydro carbons def

Answer 8

Do not mix with water

Crude oil gasoline etc.

Question 9

AFFF made of.

Answer 9

Flourochemical and hydrocarbon combined with high boiling point solvents