Home > Flashcards > Print Preview

The flashcards below were created by user MDekker on FreezingBlue Flashcards. What would you like to do?

  1. What is ventilation?
    The process of removing smoke, heat, and toxic gases from a burning building and replacing them with cooler, cleaner, more oxygen-rich air.
  2. What are the benefits of proper ventilation?
    • Locate trapped occupants faster
    • Fresh air to occupants
    • Advance hose lines rapidly and safely
    • Reduce backdraft and flashover
    • Limit fire spread
    • Reduce property damage
  3. When performing ventilation, which side of the building is opened first/last?
    Leeward side is always opened first, followed by the windward side.
  4. What are 3 reasons to perform ventilation?
    Life safety, containment, and property conservation
  5. Where should you ventilate?
    As close to the fire as possible
  6. What are the 2 basic types of ventilation?
    Horizontal and vertical
  7. What are the 2 different methods to perform ventilation?
    Natural and mechanical
  8. What are the 3 types of mechanical ventilation?
    Negative-pressure, positive-pressure, and hydraulic
  9. What are the advantages of negative-pressure ventilation?
    Explosion proof motors
  10. What are the limitations of negative-pressure ventilation?
    • Positioning
    • Power source
    • Maintenance
    • Air flow control
  11. What are the advantages of positive-pressure ventilation?
    • Quick and efficient
    • Increased safety
  12. What are the limitations of positive-pressure ventilation?
    • May spread the fire
    • May increase carbon monoxide levels
  13. What 2 things should be kept in mind when performing positive-pressure ventilation?
    • Exit vent hole should be smaller than PPV fan hole
    • PPV fan should cover the entire opening
  14. Describe hydraulic ventilation
    • Fog stream set to cover 90% of the window
    • Nozzle should be roughly 2 feet back from window
    • Advantage is that you can move several thousand cubic feet of air per second
    • Disadvantages are water damage and possible safety hazards
  15. What are 3 types of roof ventilation cuts?
    Rectangular, peak, and trench
  16. Describe a rectangular roof cut
    • Four cuts completely through the decking
    • Use care not to cut structural supports
    • Stand upwind and have a safe exit
    • If several layers exist, you may have to peel a layer at a time
  17. Describe a peak roof cut
    • Used for peak roofs with plywood sheeting
    • A tool is used to reveal the roof covering along the peak
    • A power saw or axe is used to make a series of vertical cuts
  18. Describe a trench cut
    • Used to stop the progress of a large fire in a narrow building
    • Creates large opening ahead of the fire
    • "Writes off" a part of the building
  19. Describe Measures M and when it would be used.
    Measures M is a combination of vertical and horizontal ventilation generally used in a high rise building. 

    • 1) Grade level exterior door is opened.
    • 2) Grade level stairwell door is opened.
    • 3) Fire floor stairwell door is opened.
    • 4) Fire unit door is opened.
    • 5) Fire unit doors/windows are opened.

    Positive pressure fan is placed in front of the exterior door and forces out all the smoke and toxic gases created in a fire.

Card Set Information

2013-10-15 14:45:07

Ventilation questions
Show Answers:

What would you like to do?

Home > Flashcards > Print Preview