Term
| 4 ways that firefighting foam extinguishes or prevents fire: |
|
Definition
separating
cooling
smothering
penetrating |
|
|
Term
| Low expansion water to foam ratio |
|
Definition
|
|
Term
| Medium expansion water to foam ratio |
|
Definition
|
|
Term
| High Expansion water to foam ratio |
|
Definition
|
|
Term
| which type of foam is most common, low expansion, med expansion, or high expansion. |
|
Definition
|
|
Term
| NFPA __ - Standard for low, med, high expansion foam. |
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Definition
|
|
Term
| Class A fuels are defined as? |
|
Definition
|
|
Term
| Class A foam is a special formulation of _____ that_________ |
|
Definition
| hydrocarbon surfactants that reduces the surface tension of water |
|
|
Term
| In general class A foam can be used with what 2 types of nozzles and what types of devices/systems? |
|
Definition
fog nozzles
aspirating foam nozzles
Medium expansion devices
High expansion devices
CAFS |
|
|
Term
| Class B fuels are defined as? |
|
Definition
| Flammable and combustible liquids |
|
|
Term
| Class the foam concentrates are made from what two types of bases? |
|
Definition
|
|
Term
| Synthetic class B foam is made from a mixture of ___? |
|
Definition
|
|
Term
| The rate of application for class B foam depends on what five factors |
|
Definition
1) Type of foam concentrate used
2) Whether the fuel is on fire
3) type of feul (hydrocarbon/polar solvent)
4) whether fuel is spilled or contained in tank
5) foam application via fisxed system or portable equipment |
|
|
Term
| The foam blanket on un-ignited spills should be approximately ___" thick |
|
Definition
|
|
Term
| Most fire fighting foam concentrates are intended to be mixed with ___ to ___% water |
|
Definition
|
|
Term
| Which can be adjusted for mission specific percentages? class A or B foam |
|
Definition
|
|
Term
| In general class A foam is mixed between __ and ___ percent |
|
Definition
|
|
Term
| Normal concentration for hydrocarbon fuels |
|
Definition
|
|
Term
| Normal concentration for polar solvent fuels |
|
Definition
|
|
Term
| Concentration for new were multipurpose foam that can be used on polar solvent and hydrocarbon fuels? |
|
Definition
|
|
Term
| Immediately expansion class B foams are typically used at either ___, ___, or ___% |
|
Definition
|
|
Term
| What are the four basic methods by which foam may be proportioned? |
|
Definition
| Induction // injection // batch-mixing // pre-mixing |
|
|
Term
|
Definition
| The water passes through any eductor that has been placed in a foam container thus creating a draft caused by the victory effect and crafting foam into the water stream |
|
|
Term
| The injection method of proportioning foam uses ____ or ____ to force foam concentrate into the fire stream |
|
Definition
| head pressure or an external pump |
|
|
Term
| The injection method of foam proportioning is commonly employed in _____ or ____applications |
|
Definition
| Apparatus mounted // fixed fire protection systems |
|
|
Term
| What is the simplest and most accurate method of mixing foam concentrate and water? |
|
Definition
|
|
Term
| Batch mixing is more common with class ___ foam but less common with class ___ foam |
|
Definition
more common with class A
less common with class B |
|
|
Term
| Typically what is one of the more commonly used methods of proportioning foam? |
|
Definition
|
|
Term
| Typically the pre-mix method is used with what 4 applications? |
|
Definition
Portable extinguishers
wheeled extinguishers
skid mounted twin agent units
vehicle mounted tank systems |
|
|
Term
| Premixed foam is typically discharge from a pressure rated tank using either ___ or ___ |
|
Definition
| Compressed inert gas or air |
|
|
Term
| The foam concentrate in to the doctor should be no more than ___ feet above the liquid surface of the foam concentrate. |
|
Definition
|
|
Term
| Installed in-line eductors // around the pump proportioners // balanced pressure proportioner // these are all examples of proportioners found where? |
|
Definition
|
|
Term
| What type of pump is used in a CAFS system? |
|
Definition
| Standard centrifugal pump |
|
|
Term
| In a CAFS system what type of proportioning system mixes foam solution with water on the discharge side of the pump? |
|
Definition
| Direct-injection foam-proportioning system |
|
|
Term
| Is the stream reach longer or shorter when using a CAFS system over other foam systems? |
|
Definition
| The stream length is considerably longer using CAFS |
|
|
Term
| Are hoselines Heavier or lighter when using CAFS? |
|
Definition
| Lighter - he hose line contains finished foam |
|
|
Term
| Is hose reaction more or less significant when using a CAFS system? |
|
Definition
| The hose is more reactive |
|
|
Term
| Compared to other foam systems does the foam produced in a CAFS system adhere well to vertical walls and other surfaces |
|
Definition
| Foam produced by a CAFS adheres well to vertical surfaces |
|
|
Term
| IFSTA defines a handline nozzle as? |
|
Definition
| In the nozzle that 1 to 3 firefighters can safely handle and that flows less than 350 GPM |
|
|
Term
| the use of a solid bore nozzle for foam application is limited to certain types of class __ applications |
|
Definition
|
|
Term
| Solid bore nozzles are most often used with what type of foam system? |
|
Definition
|
|
Term
| When fix flow or automatic file nozzles are used with foam solutions they produce ___ expansion foam with a ___ duration |
|
Definition
| Low expansion foam with a short duration |
|
|
Term
| Fog nozzles test application is when used with ____ and class ___ foam |
|
Definition
| Regular AFFF and Class A foam |
|
|
Term
| Fog nozzles cannot be used with ____ or ____ foams |
|
Definition
| protein of flouroprotein foam |
|
|
Term
| Fog nozzles may be used with ____ on ____ fires |
|
Definition
| ARAFFF on Hydrocarbon fires |
|
|
Term
| Fog nozzles should not be used on___ fires? |
|
Definition
| Polar solvent fires due to insufficient aspiration |
|
|
Term
| do foam nozzles or air aspirating foam nozzles make a higher quality low expansion foam? |
|
Definition
| Air aspirating foam nozzles make the highest quality foam |
|
|
Term
| What Handline nozzle makes the highest quality low expansion foam? |
|
Definition
| Air aspirating foam nozzles |
|
|
Term
| can protein-based foams be used with air aspirating foam nozzles? |
|
Definition
| yes, Protein and flouroprotein based foam can be use |
|
|
Term
| Which has a farther reach fog nozzles or air aspirating foam nozzles? |
|
Definition
|
|
Term
| What are the two types of medium and high expansion foam generators? |
|
Definition
| Water-aspirating type nozzle // mechanical blower generator |
|
|
Term
| Water aspirating type nozzles are used for what expansion range of foam generation? |
|
Definition
| Medium and high expansion |
|
|
Term
| Polar solvent VS. Hydrocarbons |
|
Definition
Polar solvents are flammable liquids that mix readily with water.
Hydrocarbons are PETROLIUM based combustible liquids or flammable liquids that float on water |
|
|
Term
Polar solvent or Hydrocarbon?
Crude Oil |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Fuel Oil |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Gasoline |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Benzene |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Naphtha |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Jet Fuel |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Kerosene |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Alcohols |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
Acetone |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
lacquer thinner |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
ketones |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
esters |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
acids |
|
Definition
|
|
Term
| Hydrocarbon fuel - Float or mix with water? |
|
Definition
|
|
Term
| polar solvent fuel - float or mix with water? |
|
Definition
|
|
Term
Polar solvent or Hydrocarbon?
petroleum based combustible? |
|
Definition
|
|
Term
| list the three foam application techniques |
|
Definition
| Roll-on // Bank-down // Rain-Down |
|
|
Term
| The bank down method is used primarily on ___ fires and fires involving ___? |
|
Definition
| dike fires and fires involving overturned transport vehicles |
|
|
Term
| The rain down method is used primarily on ______ fires |
|
Definition
| above ground storage tank fires |
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|
