ch 12

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ch 12
2013-03-09 00:15:41

ch 12
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  1. Properly performed, ventilation operations accomplishes all of the following except -

    A) Channels toxic gases and heated air away from trapped occupants.
    B) Decreases the chances of flashover or backdraft.
    C) Decreases fire flair up.
    D) Allows cool air into the building, which facilitates entry by firefighters, and facilitates rescue efforts to find unconscious victims.
    Answer --> C
  2. During ventilation operations, when is a charged hoseline necessary?

    A) When it protects the ventilation crew.
    B) When it protects exposures.
    C) After ventilation has been completed.
    D) A and B.
    Answer --> D
  3. Ventilation holes should be positioned -
    Directly over the fire.
  4. When heat, smoke and other gases accumulate to the state in which they bank down and begin to spread laterally to involve other parts of a structure, we refer to this condition as -
  5. How does ventilation reduce the chance of mushrooming?
    By directing heated gases to rise vertically.
  6. Proper ventilation reduces the chances of flashover by removing __ from the structure.
  7. If the possibility of backdraft exists firefighters should -
    Vertically ventilate at the highest point before attempting to enter the structure.
  8. When considering the ventilation of a burning structure, what of the following should you consider first?
    The safety of the occupants and your firefighters.
  9. What color would you expect the smoke to be that may indicate the potential of a backdraft situation?
    gray yellow
  10. You arrive at the scene of a two story wood frame house on fire. You conjecture that the fire is in its early stages by the presence of __ smoke bellowing from the structure.
  11. After considering the safety of occupants and firefighters, the fire officer must make a series of decisions pertaining to ventilation needs. By the nature of fire situations, what is the first decision the fire officer should make?
    Decide if there is a need to ventilate at this time.
  12. When should rescue operations begin?

    A) Prior to ventilation.
    B) Simultaneously to ventilation.
    C) After ventilation operations have begun.
    D) Any of the above depending on the circumstances.
    Answer --> D
  13. In high-rise buildings fire and smoke may spread rapidly via stairways, elevator shafts, pipe shafts, air-handling systems, and any other vertical openings. This causes an upward draft known as the -
    Stack effect.
  14. Smoke and other fire gases will travel through a high building until -
    Their temperatures come to equilibrium with ambient air.
  15. In a high-rise building, before doors leading to the involved fire floors are opened, the door to the roof must -

    A) Be blocked open.
    B) Be removed.
    C) Be tied close.
    D) A and B.
    Answer --> D
  16. A fire breaks out on the second floor of an eight story high-rise building. Hot fire gases have traveled through the stairwell and gas temperatures reach equilibrium with ambient air on the six floor. On which floor would you expect to find the maximum amount of smoke?
    6th floor.
  17. What causes heat, smoke, and fire gases to travel upward to the highest point in an area, until they are trapped by a roof or a ceiling?
  18. When firefighters commence ventilation operations they should expect the fire to -

    A) Decrease in intensity.
    B) Increase in intensity.
    C) Change little from prior ventilation procedures.
    D) Produce more smoke.
    Answer --> B
  19. Top ventilation in high-rise buildings must be considered -
    During pre-incident planning.
  20. Which common roof style slopes down from the outside edges to the center of the building?
  21. When working on a roof for ventilation purposes, how many means of escape should be in place to help insure firefighter safety?
  22. The best tool for opening up a slate or tile roof is a -
  23. Trench ventilation cuts -
    Should extend the entire width of the roof.
  24. When performing a trench cut in a roof, the hole or trench should be at least -
    4 feet wide.
  25. Why should firefighters make an effort to cut rectangular or square openings?

    A) They are easier to cut.
    B) They provide a better draft.
    C) They helped to facilitate repairs to the roof.
    D) All the above.
    Answer --> D
  26. When cutting a large ventilation hole in a roof, the opening should be at least -
    4 x 4 feet.
  27. Which roof cut utilized during ventilation operations, consists of a small cut, normally the width of the cutting blade, that is used to determine the direction of fire spread?
    kerf cut
  28. Pertaining to ventilation, which of the following consists of three cuts that form a small triangle?

    A) Kerf cut.
    B) Inspection hole.
    C) Louvered cut.
    D) Trench cut.
    Answer --> B
  29. __ are made in between the rafters rather than beside them, causing the panels to be hinged on the rafters.
    Louvered cuts
  30. __ roofs are most commonly found on commercial, industrial, and apartment buildings.
  31. On which type of roof would you expect to find a bowstring truss?
    Arched roofs.
  32. How should metal roofs be opened?
    They should be sliced open with an axe or rotary saw and peeled back.
  33. Why can some arched roofs be difficult to ventilate?
    The lower chord of the truss may be covered with a ceiling to form an enclosed roof space.
  34. The space between an arched roof and the ceiling is sometimes called the -
  35. When attempting to ventilate an arched roof, firefighters should work -
    From an aerial ladder or platform extended to the roof.
  36. What is the chief purpose of trench ventilation?
    To stop the spread of fire in a long, narrow structure.
  37. Trench ventilation is sometimes called -
    strip ventilation
  38. The ventilation hole cut between the fire and an unfinished trench cut for the purpose of venting as much heat as possible before the fire reaches the trench is known as a -
    Heat hole.
  39. In a building with balloon construction, typically where is the first area of fire extension most commonly found, from a fire originating in the basement?
    the attic

    ref pg 567
  40. In a basement fire, to reduce the likelihood of vertical extension, what is a firefighter's last resort in ventilating the structure?
    Cutting a hole in the floor near ground level windows or doors and venting from the first floor.
  41. Which location would you consider your first choice for ventilating a basement fire?
    The basement windows.
  42. Fire streams directed above ventilation holes, which help to cool the thermal column and lessen sparks and flying brands, from a burning building are called -
    Elevated streams.
  43. Ventilating smoke and other fire gases through openings such as windows and doors is known as -
    Horizontal ventilation.
  44. Ventilation when accomplished mechanically or hydraulically is called -
    Forced ventilation.
  45. An example of __ is when a smoke ejector is placed in a window so that the smoke and other gases are discharged to the outside of a building.
    Negative-pressure ventilation.
  46. When positive pressure ventilation is being utilized to remove smoke from multiple floors of a building, where should the point of entry be placed?
    At the lowest point
  47. Using a charged hoseline to ventilate smoke and other fire gases from a burning building is known as __ ventilation.
  48. When utilizing hydraulic ventilation, the firefighter should position the nozzle so that it is at least __ from the opening of a window or door.
    2 feet
  49. You are on the interior attack hoseline for a fire in a second story bedroom. You have found the seat of the fire and have performed the initial knock down. What should you do next.
    hydraulic ventilation to clear the room
  50. When cutting a ventilation hole in a roof, where in relation to your escape route should the ventilation hole be placed?
    As far away from the escape route as possible
  51. __ is the transition between the growth state of a fire and the fully-involved state.
  52. Ventilation should only occur -
    After hoseline crews are ready to move in and attack the fire.
  53. During positive pressure ventilation, the blower fan should be positioned __ from the entry point.
    4 to 10 ft
  54. In a positive pressure ventilation operation, the exit point should be __ than the entry opening.

    A) Slightly smaller.
    B) The same size.
    C) Larger.
    D) A and B.
    Answer --> D