TB- Foam Flashcards
When do u use low expansion foam?
Useful on fire and spills involving flammable and combustible material.
When do u use HI-EX foam?
Class A combustibles that are inaccessible to FF.
ex cellars and ship holds
Can u use HI-EX on outdoor flammable materials?
No suitable
What are the 3 advantages to foam?
Extinguishes progressively
Long lasting control
Prevent ignition
What are the foams the dept uses?
Fluoroprotein
Alcohol resistive protein (Floropolydol)
Aqueous Film Forming Foam (AFFF)
HI-EX
T/F Different types of foam concentrates are not compatible and should never be mixed for STORAGE.
True
ex tanks of foam carriers, tenders etc
Can u mix low and hi-ex foam together?
no
At an incident can u mix 2 different low expansion finishing foams due to the lack of quantity?
YES
ex fluroprotein and alchol
As we know there is 2 families of foam concentrates, What are they?
Protein Which consists of fluoroprotein and alcohol resistant fluroprotein.
Synthetic Which consists of AFFF and HI-EX
Does FDNY use protein foams?
No but may encounter at bulk plants.
IS protein foam effective on gasohol or polar solvents?
no
As we know foam that is still in the container is known as concentrate. When it is mixed with water it is foam _______.
Solution.
PS they like to play with those 2 words concentrate and solution. Was on previous LT test.
T/F AFFF is effective to use around pipes in the boiler room
Not effective as a precaution a foam line should be made ready
When foam rushes through the throat of an eductor it expands creating low pressure, What is this known as?
Venturi Effect it draws concentrate out of container up in tube and into eductor that is mixed with water
What type of foam blanket can the men operate in or near?
An aerated foam blanket.
Can u enter a AFFF foam blanket?
Avoid. Wait for a more stable blanket such as fluroprotein and alcohol resistant fluoroprotein. But fluoropolydol is preferred.
Foams are lighter designed to float. What are the 4 primary methods?
Smother
Suppress
Separates
Cools
Which foam is superior in preventing re-ignition and burn back?
Fluoroprotein and is most widely used in FD
it adhers to metal good for storage tanks
What type of foam do u use on gasoline?
Fluoropolydol is superior for both hydrocarbons
gasoline,fuel spill) as well as polar solvents (alcohol,ketones
Can u use floroprotein on polar solvents fuels such as alcohol and ketones
Not suitable
not effective on pure MTBE
Dry Chem and floroprotein are compatable, What is the pour point for floroprotein?
App 10 degrees good for north east climate.
Pour point floropolydol is 5 degrees.
Which spreads across a fire quicker AFFF or floroprotein?
AFFF
Fluoroprotein foam can not be used with salt water?
False u can use salt or fresh water
What rate is hydrocabons used at and what about polar solvents?
HYDrocarbons 3%
POLARS 6%