Preventing Firefighter Disorientation Ch5 Easy
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Questions and Answers

What was the only known similarity among the structure fires examined in the disorientation study?

  • The fires all occurred in commercial structures
  • The fires were all of the same construction type
  • The firefighters became confused or disoriented in each incident (correct)
  • The structures were all built during a specific era
  • How many different types of occupancies were represented among the structures in which disorientation occurred?

  • 4
  • 7
  • 6 (correct)
  • 5
  • What was the most common construction type among the structures in which disorientation occurred?

  • Protected wood-frame construction
  • Heavy timber construction
  • Unprotected noncombustible construction (correct)
  • Fire-resistive construction
  • What was the range of sizes for the structures in which disorientation occurred?

    <p>19 ft. wide by 33 ft. long to 500 ft. wide by 600 ft. long by 25 ft. high</p> Signup and view all the answers

    What percentage of the structures had an enclosed design?

    <p>100%</p> Signup and view all the answers

    How many buildings were involved in the structural analysis?

    <p>17</p> Signup and view all the answers

    What percentage of cases experienced prolonged zero visibility conditions (PZVCs)?

    <p>100%</p> Signup and view all the answers

    How many buildings were unoccupied during the fire?

    <p>50%</p> Signup and view all the answers

    What caused confusion and injuries in 100% of the cases?

    <p>Handline separation</p> Signup and view all the answers

    What type of building was thought to be occupied but was vacant?

    <p>Single-family dwelling</p> Signup and view all the answers

    What did arriving firefighters encounter in 94% of the cases?

    <p>Smoke conditions</p> Signup and view all the answers

    What caused the loss of company integrity in 100% of the cases?

    <p>Flashovers or backdrafts</p> Signup and view all the answers

    In what percentage of cases did disorientation incidents continue to occur nationally?

    <p>100%</p> Signup and view all the answers

    What caused disorientation in 65% of the cases examined?

    <p>Depletion of air supply while attempting to evacuate</p> Signup and view all the answers

    What percentage of structures lacked a functioning sprinkler system?

    <p>88%</p> Signup and view all the answers

    What rendered activating sprinkler heads ineffective in one incident?

    <p>High winds entering a high-rise hallway</p> Signup and view all the answers

    In how many incidents did disorientation occur within the structures at various distances measured from the point of entry?

    <p>Four distances: 10 ft., 10—20 ft., 25 ft., and 30—40 ft.</p> Signup and view all the answers

    What caused disorientation in all of the incidents examined during the study period?

    <p>&quot;A chain or sequence of events&quot;</p> Signup and view all the answers

    "Blinding soup" that covered personal protective equipment was created by:

    <p>&quot;Water spray from activating sprinkler heads mixed with suspended powder from a dye-processing operation&quot;</p> Signup and view all the answers

    What percentage of firefighters experienced disorientation for sustained periods of time?

    <p>100%</p> Signup and view all the answers

    How many additional disorientation sequences were identified following a review of cases included in the U.S. Fire Administration's 'U.S. Firefighter Fatality Retrospective Study'?

    <p>27</p> Signup and view all the answers

    Study Notes

    • The structural analysis involved 17 buildings, including a 20-year-old single-family dwelling, a thrift store built in the 1940s, and a 98-year-old warehouse built in 1905.
    • Half of the structures were occupied during the fire, half were unoccupied, and one was vacant, despite being thought to be occupied.
    • Disorientation occurred in structures with various sizes, heights, types of occupancy, and construction.
    • Structure analysis revealed that 100% of the structures had an enclosed design.
    • Arriving firefighters encountered smoke conditions ranging from nothing to heavy densities in 94% of the cases.
    • In all cases, firefighters initiated an aggressive interior attack to locate and extinguish the fire.
    • Prolonged zero visibility conditions (PZVCs) occurred in 100% of the cases.
    • Handline separation or entangled handlines were experienced in 100% of the cases, causing confusion and injuries.
    • Company integrity was lost in 100% of the cases, often due to the force of flashovers or backdrafts.
    • During the course of the study, disorientation incidents continued to occur nationally in enclosed structures and spaces, highlighting the significance of these findings.

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    Description

    Test your knowledge about the U.S. Firefighter Disorientation Study 1979—2001 and the commonalities observed in incidents of disorientation within structures. Explore the causes and contributing factors of firefighter disorientation.

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