Foam Book 2
Card Set Information
Foam Book 2
Class B foam proportions at what percent?
1% to 6%
What are Type III application devices?
What is the foam application rate for Class B foams?
application must exceed consumption
AFFF, FFFP, AR-AFFF on hydrocarbon spill fire.
What should the discharge rate be?
Equal to 10% of the area of the spill
How much does foam weigh?
9lbs per gallon (includes weight of container)
How much does a 55gal drum of foam weigh?
55gal - 495lbs
How much do bulk containers of foam weigh?
How are UL listed foams containers tested?
5gal pails- pass several 4ft drop tests while frozen
55gal drums- withstand fall from 5ft while frozen
What are the capacity ranges for a foam tanker?
1,500gal to 8,000gal
Foam tanks on emergency service pumpers can range from?
20gal to 200gal
How much foam is carried by ARFF apparatus?
ARFF apparatus may carry in excess of 600gal
What do apparatus foam tanks need to be fitted with to prevent evaporation?
Airtight tank lid
In-Line eductors develope their rated flow at what pressure?
Fixed suppression systems may have foam tank capacities in excess of?
What size nozzle is in a 95gpm eductor?
What is the flow of a 95gpm eductor at 150psi?
What is the flow of a 95gpm eductor at 250psi?
What are the flow ranges of eductors with a
1 1/2" outlet size?
50gpm - 125gpm
How fast is water passing through the eductors venturi?
What is the max height an in-line eductor should be above the foam concentrate?
should not be higher than 6ft
How much back pressure can an in-line foam eductor tolerate?
When do 125gpm eductors tend to be problematic?
>50' of 1 1/2"hose is used
>100' of 1 3/4"hose is used
When testing a 95gpm eductor, how much will it educt in about 60sec?
more than 3gal but less than 4gal
When testing a 60gpm eductor how much should it educt in 60sec?
When testing a 125gpm eductor how much will it educt in 60sec?
slightly more than 3.5gal
What are the flow capabilities of self-educting master stream foam nozzles?
up to 12,000gpm
How far does a Jet Ratio Controller allow the concentrate to be from a self-educting master stream foam nozzle?
as far as 3,000ft
The total amount of flow of water to the JRC only represents a portion of the total flow in the system. How much is it?
about 2 1/2% of the total flow in the system
What does the JRC proportion the concentrate at?
66 2/3% solution
Portable Around the Pump Proportioners at 1% has a solution flow of?
50gpm - 4,500gpm
Portable Around the Pump Proportioners at 3% has a solution flow of?
50gpm - 1,500gpm
Portable Around the Pump Proportioners at 6% has a solution flow of?
What is the most common type of built in proportioner?
Around the Pump
What kind of proportioner is most commonly used in fixed systems and large-scale mobile apparatus?
Bypass-Type Balanced-Pressure Proportioners
Although greater concentrate flows may be possible in some applications, Variable Flow-Variable-Rate Direct Injection Systems provide foam concentrate rates from?
.1% to 3%
What type of proportioning system are you limited by the size of the concentrate tank?
Bladder-Tank Balanced-Pressure Proportioners
On a Fixed-Flow Direct-Injection Proportioner, what pressure does the concentrate pump operate at?
Concentrate pump runs about 10psi higher than the water pump.
In hot climates, what should be done with apparatus-mounted foam tanks when the foam system are idle more than 60 days?
System to be operated for about 30sec every
What foams or foam systems are solid bore nozzles limited to?
Class A foam
Compressed Air Foam System
Fixed-flow or automatic fog nozzle's best applications are when used with what types of foam concentrate?
Class A foam