14. Foam Equipment and Systems Flashcards
The most common foams in use:
Mechanical foams
480
Fuels, such as crude oil, fuel oil, gasoline, benzene, and kerosene, are petroleum based and have a specific gravity less than one and will float on water.
Hydrocarbon
Pace 480
A common method of proportioning in which pre-measured portions of water and foam concentrate are mixed in a container.
Premixing
484
The formula of Class A foam includes hydrocarbon______ that reduce the surface tension of water in the foam solution.
Surfactant
Page 487
The minimum amount of phone solution that must be applied to a fire, per minute, per square foot of fire
Application rate
Page 488
The increase in volume of foam solution once it has been aerated
Foam expansion
Page 490
Fluoroprotein foams may be made alcohol resistant with the addition of:
Ammonia salts suspended in organic solvents
Page 492
The most commonly used synthetic foam concentrate.
Aqueous film forming foam (AFFF)
Page 492
Foam that is commonly used in subterranean spaces.
High-expansion
494 it
This system requires that foam concentrate be available at the point where the nozzle is operating.
Self-educting nozzle
Page 496
These nozzles can be used with Class A foam and wildland fire fighting applications, and are the only nozzles that should be used with protein and flouroprotein concentrate.
Air-Aspirating foam nozzles
Page 504
This produces foam containing a very high air continent that is well-suited for incidents requiring total flooding.
Mechanical blower
Page 505
