Foam 2 Flashcards
How many gallons of foam are produced when three gallons of 3% Foam Concentrate is mixed with 97 gallons of water and the Expansion Factor is 15:1?
1500 Gallons
What types of applications are Foam-Water Sprinkler Systems specifically designed to protect?
Class A & B
What are the two nominal percentages of Concentrate by volume of solution discharge used in a Foam System?
3% and 6%
Which Foam Concentrate is most effective for Subsurface Injection?
Fluroprotein and FFFP (Film Forming Fluroprotein)
Where must Strainers in Foam Water Concentration Lines be installed?
Before water operated ball valve
What type of pipe is used on Foam Water Sprinkler Systems?
Copper, brass, Steel, Stainless (not Galvanized)
What is the length of time the water supply for a Foam Water System must be able to maintain the designed Discharge Rate?
60 min (NFPA 16) 5.2.3.1, 10min for foam/ greater density 7 min 7.2.3.1/ 7.2.3.2
What is the maximum rate of expansion when a proportioned mixture of Water and Foam Concentrate comes into contact with air?
1000:1
What type of Foam moves across a fuel’s surface three to four times faster than conventional foam?
AFFF - Aqueous Film Forming Foam
List four methods of introducing Foam Concentrate into a Sprinkler System.
- Premix Dumping
- Balanced pressure proportioning
- Inline Balanced pressure
- Line Proportioning
What design characteristics does a Foam Water System have in relation to standard Sprinkler Systems?
Calculations, hangers and testing
How is equipment protected when located below airplanes in Aircraft Hangers with a Foam Water System?
Fixed Nozzle piping/ Semi nozzle piping/ W.O.M
What type of standard Control Valve equipment is used in a Foam Water System?
Ball Valve/ O.S & Y/ Butter Fly Valve/ Non-rising stem
What type of Device is used to discharge foam in a Closed Head Foam System?
Sprinkler head listed to use on foam
What type of Devices are used to discharge foam in a Deluge Foam System?
Air-aspirated/ Foam chamber/ Foam Generators/ Open nozzles
What discharges from the devices in a Foam Water System?
Foam
How does Foam operate when extinguishing a fire?
Foam smothers flames separating for oxygen
How does Foam extinguish a fire on a flammable liquid?
Foam forms a blanket separating flammable vapors from oxygen
List the five different types of Foam Concentrates that are in use.
- Protein
- Fluroprotein
- FFFP
- AFFF
- AR-AFFF
- Synthetic Detergent
What two rules must be implemented when mixing Foam Concentrate in Storage?
- Same Manufacturer
- Must be of the same type
- Must pump through bottom of the tank
