-
pg52
Class B foam proportions at what percent?
1% to 6%
-
pg53
What are Type III application devices?
- Foam cannon
- Handheld nozzles
-
pg53
What is the foam application rate for Class B foams?
application must exceed consumption
-
pg53
AFFF, FFFP, AR-AFFF on hydrocarbon spill fire.
What should the discharge rate be?
Equal to 10% of the area of the spill
-
pg63
How much does foam weigh?
9lbs per gallon (includes weight of container)
-
pg63
How much does a 55gal drum of foam weigh?
55gal - 495lbs
-
pg63
How much do bulk containers of foam weigh?
250-450lbs
-
pg63
How are UL listed foams containers tested?
5gal pails?
55gal drums?
5gal pails- pass several 4ft drop tests while frozen
55gal drums- withstand fall from 5ft while frozen
-
pg63
What are the capacity ranges for a foam tanker?
1,500gal to 8,000gal
-
pg64
Foam tanks on emergency service pumpers can range from?
20gal to 200gal
-
p64
How much foam is carried by ARFF apparatus?
ARFF apparatus may carry in excess of 600gal
-
pg64
What do apparatus foam tanks need to be fitted with to prevent evaporation?
- Airtight tank lid
- and
- Vacuum/pressure vent
-
pg74
In-Line eductors develope their rated flow at what pressure?
about 200psi
-
pg65
Fixed suppression systems may have foam tank capacities in excess of?
3,000gal
-
pg74
What size nozzle is in a 95gpm eductor?
1/2" nozzle
-
pg74
What is the flow of a 95gpm eductor at 150psi?
82gpm
-
pg74
What is the flow of a 95gpm eductor at 250psi?
106gpm
-
pg74
What are the flow ranges of eductors with a
1 1/2" outlet size?
50gpm - 125gpm
-
pg74
How fast is water passing through the eductors venturi?
120mph
-
pg75
What is the max height an in-line eductor should be above the foam concentrate?
should not be higher than 6ft
-
pg76
How much back pressure can an in-line foam eductor tolerate?
Approximately 130psi
-
pg76
When do 125gpm eductors tend to be problematic?
>50' of 1 1/2"hose is used
>100' of 1 3/4"hose is used
-
pg78
When testing a 95gpm eductor, how much will it educt in about 60sec?
more than 3gal but less than 4gal
-
pg78
When testing a 60gpm eductor how much should it educt in 60sec?
almost 2gal
-
pg78
When testing a 125gpm eductor how much will it educt in 60sec?
slightly more than 3.5gal
-
pg79
What are the flow capabilities of self-educting master stream foam nozzles?
up to 12,000gpm
-
pg80
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
-
pg80
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
-
pg80
What does the JRC proportion the concentrate at?
66 2/3% solution
-
pg80
Portable Around the Pump Proportioners at 1% has a solution flow of?
50gpm - 4,500gpm
-
pg80
Portable Around the Pump Proportioners at 3% has a solution flow of?
50gpm - 1,500gpm
-
pg80
Portable Around the Pump Proportioners at 6% has a solution flow of?
750gpm
-
pg83
What is the most common type of built in proportioner?
Around the Pump
-
pg83
What kind of proportioner is most commonly used in fixed systems and large-scale mobile apparatus?
Bypass-Type Balanced-Pressure Proportioners
-
pg84
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%
-
pg86
What type of proportioning system are you limited by the size of the concentrate tank?
Bladder-Tank Balanced-Pressure Proportioners
-
pg86
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.
-
pg87
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
- 2 months
-
pg90
What foams or foam systems are solid bore nozzles limited to?
Class A foam
Compressed Air Foam System
-
pg90
Fixed-flow or automatic fog nozzle's best applications are when used with what types of foam concentrate?
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