ch 16

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hispeeddev
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211119
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ch 16
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2013-04-03 03:21:02
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ch 16
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  1. What is the term used when an attack team enters a building, adjusts the pattern of their nozzle to a straight stream, and attacks the combustibles burning near the floor area?
    Painting.
  2. Applying water in short bursts into the burning fuel until the fire darkens down is also called -
    Penciling.
  3. In a wildland fire which of the following fuels would involve roots, peat, and other partially decomposed organic matter?
    Subsurface fuels.
  4. Which statements are correct?

    (A) Flammable liquids are liquids with flash points less than 100 degrees F.
    (B) Combustible liquids are liquids with flash points higher than 100 degrees F.
    Answer: both are correct
  5. How do polar solvents and hydrocarbons differ in their physical properties?

    A) Polar solvents will mix with water.
    B) Hydrocarbons will not mix with water.
    C) Both A and B.
    D) Neither A nor B.
    Answer: C
  6. The rupturing of a tank containing flammable liquids that results in an explosion of the tank, and the characteristic fireball with radiant heat that results, is known as a -
    BLEVE
  7. __ is the preferred method for controlling flammable liquid fires.
    Foam
  8. In fires involving petroleum distillates such as gasoline, water is most useful as a -
    Cooling agent for protecting exposures.
  9. Water without foam additives can be used to extinguish which of the following fires, if applied in droplet form and in sufficient quantities?

    A) Crude oil.
    B) Kerosene.
    C) Alcohols.
    D) Gasoline.
    Answer: A
  10. Using hoselines to redirect the path of Class B fuels (burning or not) to an area where they can safely burn, or where ignition sources can be more easily controlled, is an example of using water as a -

    A) Cooling agent.
    B) Substitute medium.
    C) Mechanical tool.
    D) Protective cover.
    Answer: C
  11. When tanks containing flammable liquids are exposed to flame impingement, which of the following fire streams is most recommended?
    solid stream

    see pg 776
  12. Where on a tank should firefighters apply water when tanks of flammable liquids or gases are exposed to flame impingement?
    Lobbing the stream on top of the tank so the water runs down both sides .
  13. Natural gas in its pure form is called -
    methane
  14. Natural gas is explosive at concentrations of -
    5 - 15 %.
  15. LPG (liquefied petroleum gas) be comes explosive in concentrations between -
    1.5 - 10 %.
  16. The best method for suppressing Class C fires is to -
    Stop the flow of electricity before commencing suppression activities.
  17. What gives Natural Gas its distinctive odor?
    Mercaptan.
  18. What is the density of LPG gas as compared to ambient air?
    1.5:1
  19. Fires involving computer equipment are best controlled using -
    Halotron extinguishing agents.
  20. Fires involving downed transformers are best left up to qualified utility personnel. If firefighters have to extinguish a downed transformer the best means of extinguishment is -
    a dry chemical extinguisher
  21. The only fire stream that is recommended to be used around electrical equipment is a __ with at least __ of nozzle pressure.
    fog stream. 100 psi
  22. What is meant by 'ground gradient' ?
    The tendency of an energized electrical conductor to pass a current along the path of least resistance to the ground.
  23. The responsibility for making sure that adequate water supply is established to the fire ground, falls on the shoulders of the -
    Second-due engine company.
  24. Upon arriving at the scene of a structure fire, what is a truck company's initial responsibility?
    To observe the outside of the building for victims needing immediate rescue.
  25. Typically, fire attack in high rise buildings is usually initiated -
    On the floor below the fire floor.
  26. In wildland fires, the "Duff" would be considered -
    subsurface fuels
  27. Aerial fuels are fuels -
    That are suspended, or upright fuels that are physically separated from the ground.
  28. North of the equator, wildland fires will typically burn faster on __ exposures.
    southern
  29. The sides of a wildland fire are called the -
    flanks
  30. In the fire service, what is meant by the term wicking?
    The absorption of a hazardous, flammable, or combustible liquid by protective clothing.
  31. Approaches to storage vessels exposed to fire should be made -
    At a 45-degree angle from the vessels.
  32. Serious hazards can arise with explosions caused by short-circuit arcing or blown fuses that may ignite accumulated gases. In these situations firefighters should keep the public back at least -
    300 ft.
  33. What should firefighters do if they encounter a Class D fire and do not have on hand any Class D extinguishing agents?
    Protect exposures and allow the metal to burn out.
  34. To aggressively attack a structure fire from the exterior with large diameter fire streams is call a -
    Blitz attack.

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