TB Foam Flashcards
The mixture that results when foam concentrate is proportioned at a predetermined rate with water.
Foam Solution
A mixture of various foaming agents, surfactants, and in some cases, anti-freeze compounds, specifically formulated to produce a mass of air filled bubbles with, when mixed with water and air in the proper proportions, will float on the surface of fuel
Foam Concentrate
This foam is what is applied to a fire or spill and accomplishes the extinguishment.
Finished firefighting foam
What is the superior fire extinguishing concentrate for both hydrocarbons (gasoline, fuel oils, etc) and polar solvents (alcohols, keytones, etc)?
Fluoropolydol
What percentage of Fluoropolydol would you use for a hydrocarbon?
3%
What percentage of Fluoropolydol would you use for a polar solvent?
6%
_______________________ is the preferred foam to use if entry into a pool of fuel must be made
Fluoroploydol
Brown Label of Foam
Fluoroprotein
Green Label of Foam
Alcohol
Yellow Label of Foam
Hi-expansion
Black Label of Foam
AFFF
The premixing of Fluoroprotein foam solution can be accomplished by dumping three 5-gallon cans of concentrate into a 500-gallon booster tank (four 5-gallon cans are required for a 750-gallon tank). This produces what % of solution?
3% solution
Handline nozzles are usually used in conjunction with an eductor and are very useful at a small operation like an oil burner with the fire outside the pit, gas pump knocked over, car fire with ruptured gas tank, a small spill (approximately ________) or similar situation.
600 sq feet
Self-Educting Nozzles have the eductor built into the nozzle.This method of supplying finished firefighting foam is a fast and efficient way of producing an effective knockdown at a medium sized flammable/combustible liquid situation such as a spill over _______ sq. ft., a tanker truck mishap, a loading rack incident or similar situation.
Over 600 sq feet
Master stream nozzles are used at the largest type operations such as oil tank farms, large
spills over ________square feet, or a large capacity tank truck that has spilled its product.
Over 2000 sq feet
How much foam are ladders and engines suppose to carry and a first alarm assignment of 3 & 2 should provide how many gallons of foam concentrate?
Engine = 15 gallons (3 cans) Ladder= 10 gallons (2 can)
3 & 2 = 65 gallons of foam concentrate
If there is sufficient freeboard on the interior of a tank, direct the stream against
__________ burning area. The velocity of the stream will be broken and foam will fall gently over the surface.
the side or back of the
If the top of the container is close to the ground, and there is little or no freeboard inside the tank, the stream should be directed __________ such a manner as to bounce the foam onto the burning surface.
at the ground in front of the tank in
If an oil tank is filled to the top, bulk oil personnel will have to remove some product via the bottom of the tank. If we are planning to extinguish this fire,insure that the product level is within _____ feet of the top of the tank.
five
With one foam handline in operation, you will be able to extinguish approximately how much fire? How long will that line last?
Approximately 600 sq ft
Approximately 22 minutes
1st method to contain a flammable liquid spill if it is contained/not flowing:
1) direct foam stream on the ground ahead of the fire in such a a manner as to bound the foam onto the fire
2nd method to contain a flammable liquid spill if it is contained/not flowing:
2) Try to defelct the stream against something and allow the foam to slide down and work its way across the burning liquid
3rd methods to contain a flammable liquid spill if it is contained/not flowing:
Direct foam skyward in a slow back and forth motion, allowing the foam to fall as gently as possible over the surface
When any member enters a foam blanket, a foam handline should be trained where on their body?
back of their knees
On a tanker truck accident with a chance of a BLEVE, it is extremely important to get a large caliber stream where on a tank?
Vapor Area
What is the shelf life for protein based foam vs the synthetic based foam (AFFF, Hi-Ex)?
10 years protein based vs. 20 years synthetic based
If a ladder company needs AFFF foam concentrate, where should they requisit it from?
Technical Services Division
When cleaning foam eductors, how long should water be educted through them to clean them out?
at least 15 minutes
What is the expansion ratio for hi-ex foam to be classified as hi -ex foam?
200/1 to 1000/1
Although a relatively small flow of water is required in Hi-Ex foam operations (60
GPM), high pump pressure is necessary to overcome the pressure loss at the eductor.
Maintain between ______ PSI and ______ PSI at inlet of foam eductor in order to deliver
sufficient water under proper pressure to the foam generator.
200 and 220 PSI
Members operating in a foam environment MUST be equipped with:
Full firefighting clothing, SCBA, search rope, hoseline, and necessary tools for checking path in front of team
An AFFF extinguisher not used within _________ after charging must be
emptied, refilled and recharged.
1 year
AFFF extinguisher distance reached is?
35-40’
Foam Line Evolution:
Only ______ hose can be stretched between the eductor and the foam nozzle, with a
maximum of _______ lengths.
4 lengths
Foam Line Evolution:
The eductor must be placed at least _____ length from the pumper.
.
One length
Foam Line Evolution:
Supply the eductor with ________ hose.
2½” hose
Foam Line Evolution:
The ECC will start water and provide ________ PSI at the eductor
200 PSI
Foam Line Evolution:
To reduce back-pressure at the eductor, the nozzle should be operated __________ of the eductor
at or below the level
Foam Line Evolution:
Both the nozzle and the eductor should
have a ___ ___ band. Eductor should also have a ____ or _____ stenciled on the side.
1” white
Note: high expansion foam eductor had 2 or 200 on side and a 1” yellow band.
