Foam Book 1

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Author:
FFBRASS
ID:
277133
Filename:
Foam Book 1
Updated:
2014-06-24 14:20:08
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JFRD
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Description:
6/25 test
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  1. pg26

    What happens to a flame when it become hotter?
    It becomes less luminous
  2. pg27

    What are acids?
    They react with water to form hydrogen ions
  3. pg27

    What are Bases?
    Corrosive water-soluble compounds that react with acids to form salts.
  4. pg27

    Class C fires
    What are the oil capacities on transformers?
    Large - 20,000gal - 25,000gal

    • Small - 300gal - 20,000gal  
    • (vaulted subteranean)
  5. pg28

    Solids and liquids w/high flashpoints can be extinguished by cooling with water.

    What cannot?
    Low flash point liquids and flammable gasses.
  6. pg30

    How much additional heat does each pound of boiling water need to turn to steam?
    970BTU
  7. pg30

    At 212°F, how much does water expand?
    1,700 times its original volume
  8. pg30

    At 500°F, how much does water expand?
    2,400 times its original volume
  9. pg30

    At 1,200°F how much does water expand?
    4,200 times its original volume
  10. pg40

    What size bubble provide long lasting foam blankets that are highly desirable in post fire un-ignited spills?
    Uniform sized bubbles
  11. pg41

    What key characteristic should be considered when choosing a foam concentrate for a specific application?
    Expansion
  12. pg41

    What are the expansion ratios for Low, Medium and High?
    • Low- 20:1
    • Med- 20:1 to 200:1
    • high- 200:1 to 1,000:1
  13. pg41

    Most modern foam concentrates can be stored for how long?
    in excess of 10yrs
  14. pg41

    What are the storage temp requirements of UL foam?
    • not less than 35°F
    • not higher than 120°F

    Freezing and thawing have no effect on UL listed foam
  15. pg42

    Who establishes the maximum allowable corrosion rates for Class A foam?
    NFPA

    NFPA1150
  16. pg43

    When AFFF is concerned the environmental issues revolve around?
    • Glycol ethers (butylcarbitol)
    • and
    • Perfluorooctylsulfonates (PFOS)
  17. pg43

    When did the Navy decide to begin seeking alternative products to replace PFOS and glycol?
    May, 2001
  18. pg44

    What concentrations are high-expansion foams used at?
    1% to 2.5%
  19. pg45

    How long have wetting agents been used in the fire-suppression industry?
    since the 1940's
  20. pg45

    What is the shelf life of Class A foam concentrates?
    Indefinite
  21. pg46

    What size bubbles are best for the development of long-lasting finished Class A foam?
    Small bubbles of a consistent size.
  22. pg46

    What percentage are Class A foam concentrates mixed at?
    .1% to 1%
  23. pg46

    Most foam nozzles produce more stable foam at what percentage?
    1%
  24. pg47

    What rate do you proportion Class A foam for "Fire attack and overhaul with standard fog nozzle?"
    .2% to .5%
  25. pg47

    What rate do you proportion Class A foam for "Exposure protection with standard fog nozzle?"
    .5% to 1%
  26. pg47

    What rate do you proportion Class A for "Most operation with air-aspirating foam nozzles?"
    .3% to 1%
  27. pg47

    What rate do you proportion Class A foam for "Most operations with a compressed-air foam system?
    .2% to .5%
  28. pg49

    What type of nozzles are used with Class B foams?
    Standard fog nozzles (AFFF, FFFP)

    Air-aspirating nozzles (all types)
  29. pg50

    Foam concentrates stored in accordance with manufacturers recommendations have an indefinite shelf life.  What is not an unreasonable expectation?
    20yrs
  30. pg51

    What time frame do Protein based foam concentrates degrade?
    usually 2-8 days
  31. pg51

    What time frame do Synthetic foam concentrates degrade in?
    20-40 days
  32. pg51

    What is the key to long life vapor suppression?
    Water retention properties
  33. pg51

    What affects the life of finished foam?
    • heat
    • type of concentrate
    • expansion ratio
    • fuel involved
    • environmental conditions
  34. pg51

    Foam breaks down rapidly as the fuel temp rises.  What temp will it become ineffective?
    When the fuels temp is near or over 150°

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