14 Foam Equipment And Systems Flashcards by Nino Miraglia

Liquid having a molecule where the positive and negative charges are permanently separated resulting in their ability to ionize in solution and create electrical conductivity. Water alcohol and sulfuric acid’s are all examples of this

Polar solvents

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Foam extinguishing method that creates a barrier between fuel and fire

Separating

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Foam extinguishing method that lowers the temperature of the fuel and adjacent surfaces

Cooling

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Foam extinguishing method the prevents the release of flammable vapors reducing the possibility of ignition or reignition

Suppressing or smothering

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Class a foam is intended to be proportioned from as little as 0.1% to

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Method of proportion phone that uses extra pump to force foam concentrate into firescreen a proper ratio. Most commonly used on apparatus or fixed systems

Injection

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Production of foam solution by adding an appropriate amount of foam concentrate to a water tank before application

Batch mixing

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Mixing premeasured portions of water and foam concentrate in a container typically used with portable extinguishers

Pre-mixing

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Capacity of foam pails

5 gallons

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Foam barrel capacity

55 gal

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Foam tote capacity

275 gallons

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Foam concentrate tanks on municipal fire apparatus generally range from how many gallons

20-200 gallons

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Foam pump or or tenders may carry how many gallons or more of foam concentrate

8000 or more gallons

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The formula class a foam includes what that reduces the service tension of water in the foam solution

Hydrocarbon surfactants

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Direct skin contact with class a foam should be avoided because

It has corrosive characteristics

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Class a foam percentage for fire attack and overhaul with standard fog nozzles

0.2-0.5%

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Class a foam percentage for exposure protection with standard fog nozzles

0.5-1.0%

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Class a phone percentage for any application with air aspirating foam nozzles

0.3-0.7%

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Class a foam percent for any application with compressed air foam system

0.2-0.5%

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Type of foam best used for vertical surfaces

Dry phone, very low water content hi air content

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Best kind of foam application for areas that require maximum penetration

Wet phone, very fluid

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Best kind of foam application for surface of the fuel

Medium foam

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Shelf life of class a foam

About 20 years

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Shelf life of protein-based class B Farms

Approximately 10 years

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Shelf life for synthetic class B foams

20-25 years

Which type of Claspie phone can be mixed any time with no adverse effects

Those manufactured to mill spec

Class B foams Are mixed in proportions from what percent

1-6%

Class B concentration for hydrocarbon fuels is what percent

1-3%

Concentration for class B foam used on polar solvents is what percent

3-6%

Finish foam ratio for low expansion

20:1

Ratios for medium expansion foam

20:1-200:1

Expansion rate ratio for high expansion foam

200:1-1000:1

Un ignited fuel spills do not require the same application rate of class b foam due to

The lack of radiant heat open flame and thermal draft

Ability of a foam blanket to resist direct flame impingement such as would be evident by partially extinguished petroleum fire

Burn back resistance

Type of class B foam that is a combination of protein base and synthetic

Fluoroprotein from

Foam concentrate that combines the qualities of floroprotein foam with those of aqueous film forming foam

Film forming floroprotein foam

Synthetic concentrate that when applied with water can form a complete vapor barrier over fuel spills highly effective extinguishing in blanketing agent

Aqueous film forming foam

Pressure at the discharge side of the eductor must not exceed what percent of the eductor inlet pressure

70%

When inlet pressure is too low the eductor will create a foam solution that is too

Lean

When inlet pressure is too high the eductor may create a foam solution that is too

too rich

Foam concentrate inlet to the eductor must not be higher than how many feet above the surface of the concentrate

The nozzle and eductor must have the same rating for what in order to operate successfully

Same gpm rating

Foam proportioned built into the nozzle

Self educting nozzle

Master stream with foam proportioned built in

Self educting master stream foam nozzle

Type of foam eductor that is used to supply self educting master streams and may be located at distances up to 3000' from the nozzle. Allowing ff to maintain fire pump and foam supply

Jet ratio controller

Common type of apparatus mounted proportioner a small bypass return line is attached to the discharge side of the pump goes through a portioner attached to a foam tank and then back to the intake side of the pump

Around the pump proportioner

Foam concentrate proportioner the operates in tandem with a fire water pump to ensure a proper foam concentrate to water mixture

Bypass type balanced pressure proportion

Variable flow variable rate direct injection systems proportion foam concentrate at rates from what percent

0.1-3%

Apparatus mounted phone system that injects the correct amount of foam into the pump piping. There by supplying all discharges with the phone. System automatically monitors operations and maintains a constant quality foam solution

Variable flow variable rate direct injection system

Type of foam injection system that cannot use alcohol resistant foam concentrates due to the viscous nature of the product

Variable flow variable rate direct injection system

Foam proportioning system that is used in both fixed and mobile applications. A variable speed mechanism drives the foam pump and automatically monitors the flow to produce an effective solution

Variable flow demand type balanced pressure proportioner

Simplest method of proportioning foam

Batch mixing, dump in method

Generally batch mixing is only used with what types of foam concentrate

Class a, regular AFFF

Class a solutions do not retain their foaming Properties when mixed in water for more than how many hours

24 hours

The reach of CAFS is what in relation to normal streams

Further because of the air pressure

Foam system that creates small uniform air bubbles that are very durable

CAFS

Otherwise known as high energy foam

CAFS

Hose lines containing CAFS or high energy foam weigh what comparatively to regular hose streams

Less

Generally how many cubic feet per minute of airflow per gpm of foam solution produces dry foam of up to 100 gpm

2 cubic ft per min

Most structural and woodland CAFS operations use what airflow rate to allow adequate drainage of solution from the blanket to wet the fuel

0.5-1.0 cubic ft per min

The use of smooth bore nozzles is limited to the application of class a foam from what type of foam system

CAFS

When using CAFS with smooth ore nozzles, how big should the tip be

No greater than half the diameter of the hose

Expansion ratios for most fog nozzles are low, what range

2:1-4:1

Fog nozzles are most efficient with what type of foam

Class a and AFFF or AR- on hydro carbon fire

Fog nozzles are not effective with what type of foam and fire

Fluoroprotein and not for polar solvent fires

Only nozzle that should be used for protein and Fluoroprotein concentrates

Air aspirating nozzle

Two types of medium and high expansion foam generators

Water aspirating, mechanical blower

Water aspirating devices for medium and high expansion foam are similar to other foam producing nozzles except

They are considerably larger and longer. GhostBuster nozzle

Foam application method for use with class a foam. Applying it on the burning material

Direct application

Class b Foam application method that involved directing the stream on the ground near the edge of the spill and allowing it to tumble over onto it

Roll on method.

When should the rain down method of application be employed

When the role on rain down method or impractical due to elevation of fuel

True false no foam concentrates or solutions or finished foam should be discharged into any body of water

True it can kill fish wildlife and vegetation

Super absorbent liquid polymers capable of absorbing hundreds of times their own weight in water. These can be used as fire suppressant's and retardants. Function by trapping water in their structure rather than air

Gelling agents

Gelling agents or otherwise known as

Durable agents

Gelling agents are used in the same matter as what class of foam

Class a foam

When used as an extinguishing agent the standard application ratio of gelling agents or durable agents is what

1:1000

When used on the Fireline durable agents are applied at what percents

1.5-2%

For structure protection the application of durable agents is what percent

2-3%

Durable or gelling agents can adhere to a vertical surface for up to how many hours

24 hrs

Polar solvent fuels such as alcohol acetone key tones and esters Are known as what type of liquid because they mix with water

Miscible

14 Foam Equipment And Systems Flashcards

(80 cards)