IFSTA Chapter 18 - Foam Fire Fighting, Liquid Fires, and Gas Fires Complete Study Guide 2024.

IFSTA Chapter 18 - Foam Fire Fighting, Liquid Fires, and Gas Fires Complete Study Guide 2024. Which type of foam proportioner can compromise firefighter safety by slowing firefighters down since it requires the concentrate to be available where the nozzle is being operated? Select one: a. Compressed air foam system (CAFS) b. Apparatus-mounted proportioner c. Foam nozzle eductor d. In-line eductor - correct answer Foam nozzle eductor The premixing method of foam proportioning is typically used with: Select one: a. fog nozzles attached to a large hoseline. b. a fixed fire protection system in a structure. c. in-line eductors. d. vehicle-mounted tank systems. - correct answer vehicle-mounted tank systems. Which method of foam application is only suitable for use on a pool of liquid fuel on open ground? Select one: a. Roll-on method b. Spread-over method c. Bank-down method d. Rain-down method - correct answer Roll-on method In order to prevent reignition of a liquid fuel fire after foam has been applied, do NOT: Select one: a. let the foam sit for more than 5-10 minutes without replenishing it. b. apply a solid or straight stream of water to the foam blanket. c. add any more foam after the surface has been covered once. d. apply more foam than necessary for extinguishment. - correct answer apply a solid or straight stream of water to the foam blanket. Most fire fighting foams are intended to be mixed with: Select one: a. 50 to 75.9 percent water. b. 80 to 90 percent water. c. 30 to 60 percent water. d. 94 to 99.9 percent water. - correct answer 94 to 99.9 percent water.