Which method of foam application is only suitable for use on a pool of liquid fuel on open ground?
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What are the three methods of foam application?"When applying foam, there are three generally accepted methods: bank-down, roll-on, and rain-down.
Which type of foam is used to extinguish fires involving flammable and combustible liquids?Unlike other extinguishing agents - water, dry chemical, CO2, etc., a stable aqueous foam can extinguish a flammable or combustible liquid fire by the combined mechanisms of cooling, separating the flame/ignition source from the product surface, suppressing vapors and smothering.
Which method of foam proportioning involves using an external pump?Injection. The injection method of proportioning foam uses an external pump or head pressure to force foam concentrate into the fire stream at the correct ratio in comparison to the flow. These systems are commonly employed in apparatus-mounted or fixed fire protection system applications.
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