Engine Ops | Foam
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Questions and Answers

What is the recommended application rate for Class A foam using Air Aspirating Nozzle (PRO/Pak low and medium nozzles)?

  • 5%
  • 3%
  • 0.1% (correct)
  • 13%
  • What is the operating range of Class A foam?

  • 3-6%
  • 0.1% (correct)
  • 13%
  • 5-gallon pails
  • What should be considered when operating the inline eductor?

  • Maximum hose lengths (correct)
  • Basic operating pressures
  • Shelf life of foam
  • Tactical considerations
  • At what percentage range will older Class B Foam be, compared to newer Class B Foam?

    <p>3-6%</p> Signup and view all the answers

    What is the maximum shelf life of CFD foam when left in sealed containers?

    <p>Nearly unlimited</p> Signup and view all the answers

    In what situations should Class A Foam be used?

    <p>House fire overhaul</p> Signup and view all the answers

    In foam operations, what is the most common cause of eductor failure?

    <p>Kinks in the hose line</p> Signup and view all the answers

    What is the recommended application rate for hydrocarbons like gasoline or diesel in foam operations?

    <p>3%</p> Signup and view all the answers

    Which nozzle should be used with a 95 GPM eductor?

    <p>SM20-FLP</p> Signup and view all the answers

    What is the minimum pressure required at the eductor?

    <p>40 PSI</p> Signup and view all the answers

    What type of materials fall under Class A use for foam operations?

    <p>Mop-up and overhaul operations</p> Signup and view all the answers

    Which percentage knob setting is recommended for Class B use involving hydrocarbons?

    <p>3%</p> Signup and view all the answers

    What is the maximum pressure at the PRO/Pak control unit?

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

    What should be done to clean the foam system after use?

    <p>Remove the nozzle and hose from the unit</p> Signup and view all the answers

    What happens if there is too much hose between the eductor and the nozzle?

    <p>It causes excessive back pressure in the foam system</p> Signup and view all the answers

    Why do hydrocarbons not mix with water in foam operations?

    <p>They are lighter than water and float on top</p> Signup and view all the answers

    What type of material would require a 6% application rate in foam operations?

    <p>Alcohol base</p> Signup and view all the answers

    What is the recommended maximum hose length between the 125 GPM eductor and the nozzle?

    <p>200 feet</p> Signup and view all the answers

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