This is slowly released as foam breaks down and provides a cooling effect on the fuel.
What is Water?
100
To mix foam concentrate and water with air.
What is Aerate?
100
This method of proportioning foam uses the pressure energy in the stream of water to induct (draft) foam concentrate into the fire stream.
What is Induction (eduction)?
100
Newer structural fire fighting engines are sometimes equipped with this type of foam system.
What is CAFS (Compressed Air Foam System)?
100
These nozzles are most often used with Compressed Air Foam systems.
What are solid bore nozzles?
200
This foam is intended for use on flammable solids.
What is Class A foam?
200
The increase in the volume of foam solution when it is aerated.
What is Foam Expansion?
200
This type of foam is mixed in proportions of 1% to 6%. Some newer brands are designed for use on both Hydrocarbons and Polar solvents.
What is Class B foam?
200
An in-line eductor must not be more than this height above the surface of the foam concentrate.
What is 6 feet?
200
The most effective appliance for the generation of low expansion foam is this type of nozzle.
What is an Air Aspirating Foam Nozzle?
300
Class B foam is especially effective on these two basic categories of flammable liquids.
What are Hydrocarbons (petroleum products that float on water) and Polar Solvents (alcohols, acetone, lacquer thinner and acids that mix with water)
300
This foam is used to prevent the ignition of or to extinguish fires involving flammable and combustible liquids.
What is Class B foam?
300
The simplest method for mixing foam concentrate and water. Its done in the apparatus water tank.
What is Batch mixing?
300
This part of an in-line foam eductor is inserted directly into the foam container.
What is the pickup tube?
300
This device produces foam with a high air content and is typically associated with a total flooding application. Its use is limited to high expansion foam.
What is a Mechanical Blower Generator?
400
Raw foam liquid before the introduction of water and air.
What is Foam Concentrate?
400
Depending on its purpose, foam can be described by these three types.
What is Low expansion, Medium expansion and High expansion?
400
This method of proportioning employs an external pump to force foam concentrate into the fire stream at the correct ratio for the water flow. This system is generally mounted on the apparatus.
What is an Injection method?
400
Class B foam for use on Polar solvents is set at this percentage rate on the proportioning device.
What is 6%?
400
This method of application is used primarily in dike fires and fires involving spills around damaged or overturned transport vehicles. The foam is directed onto an object and allowed to run down onto the surface of the fuel.
What is the Bank Down Method?
500
The device that introduces foam concentrate into the water stream to make the foam solution.
What is a Foam Proportioner?
500
Low expansion foam has this air/solution ration when finished.
What is 20:1 or 20 parts finished foam for every one part of foam solution.
500
In-line eductors rely on the properties of this Physical Law to draft foam concentrate into the fire stream.
What is the Venturi Principle?
500
For complete information on foam application rates, consult the foam manufacturers reccomendations, IFSTA Principles of Foam Fire Fighting manual and this NFPA standard.
What is NFPA 11?
500
This method of application directs the foam stream onto the ground near the front edge of a burning liquid spill. The foam then rolls across the surface of the fuel. This method is used only on a pool of liquid fuel on the open ground.