ch 15

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  1. The primary way water extinguishes fire is by -
  2. __ is defined as that part of the total pressure that is lost while forcing water through a pipe, fitting, fire hose, and adapters.
    Friction loss
  3. Parallel or siamese hoselines are used in order to -
    Increase flow and reduce friction.
  4. In fire fighting elevation refers to -
    The position of the nozzle in relation to the pumping apparatus.
  5. __ refers to the gain or loss of pressure in a hoseline due to a change in elevation.
    Elevation pressure.
  6. When water flowed through a hoseline or pipe is suddenly stopped, the resulting surge of pressure is referred to as -
    water hammer
  7. The best way to avoid causing a water hammer is to -
    Close nozzles and valves slowly.
  8. A fire stream that discharges less than 40 gallons per minute would be classified as a -

    A) Low volume stream.
    B) Handline stream.
    C) Hoseline stream.
    D) Master stream.
    Answer: A
  9. A fire stream that discharges 40 to 350 gallons per minute would be considered a -

    A) Low volume stream.
    B) Handline stream.
    C) Hoseline stream.
    D) Master stream.
    Answer: B
  10. A fire stream that discharges more than 350 gpm would be classified as a -
    master stream
  11. The fire stream produced from a fixed, smoothbore nozzle is known as a -
    Solid stream.
  12. Fire streams that have been formed into coarse divided drops are known as -
    broken streams
  13. Which fire stream is less likely to disturb the thermal layering in an interior structure fire attack?
    solid stream
  14. If a solid stream is used on a handline it should be operated at ____ psi.
  15. A solid master stream device should operate at a pressure of -
    80 psi
  16. The point at which a fire stream begins to lose its forward velocity is known as -
    the point of breakover.
  17. Which would not be considered a Polar Solvent?

    A) Acetone.
    B) Benzene.
    C) Lacquer thinner.
    D) Acids.
    Answer: B
  18. Which of the following would not be considered a Hydrocarbon fuel:

    A) Alcohols.
    B) Crude oil.
    C) Naphtha.
    D) Gasoline.
    Answer: A
  19. Foam has been shown to be an effective means for extinguishing fires involving -
    Flammable liquids
  20. What may be the consequence, if ventilation is not provided ahead of hose teams involved in a direct or combination fire attack?
    There is a high possibility that steam and even fire will roll back over and around the hose team.
  21. Which type of fire fighting foam is the most commonly used at a rate of 20:1 to 200:1?
    Medium expansion foam.
  22. Low expansion foam has an air/solution ratio up to -
  23. Class B foams are designed to extinguish -
    all class B fires
  24. High expansion foams have an expansion ratio between -
    200 : 1 to 1,000 : 1.
  25. Class A foams effectively work by -
    Reducing the surface tension of the water in the foam solution, thereby providing for increased water penetration, and increased effectiveness.
  26. Most foam concentrates are intended to be mixed with __ water.

    A) 75% - 80%.
    B) 80% - 90%.
    C) 90% - 94%.
    D) 94% - 99.9%.
    Answer: D
  27. At what concentration would you use a Class B foam when dealing with hydrocarbon fuels?
  28. At what concentration would you use a multipurpose Class B foam when dealing with a polar solvent fuel?
  29. When using an in-line eductor, what is the maximum height the eductor can be placed above the foam concentrate liquid level?
    6 feet
  30. The most effective nozzle for generating low expansion foam is the -
    Air-aspirating foam nozzle.
  31. Which nozzle cannot be used with protein or fluoroprotein foams?
    Fog nozzles.
  32. Which would NOT be considered a technique for applying foam to a liquid fuel fire or spill?

    A) Build-Up method.
    B) Roll-On method.
    C) Bank-down method.
    D) Rain-down method.
    Answer: A
  33. Which foam application technique would you be using if you directed the foam stream on the ground near the front edge of a burning liquid pool, and allowed it to roll across the surface of the fuel.
    roll on method
  34. Combination nozzles are designed to operate at different pressures. The designed operating pressure for most combination nozzles is -
    75 psi
  35. IFSTA defines a handline nozzle as any nozzle that __ can safely handle.
    3 firefighters
  36. IFSTA defines a handline nozzle that flows less than -
    350 gpm
Card Set:
ch 15
2013-04-01 07:20:30

ch 15
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