Portable Fire Extinguishers

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Author:
readyreg29
ID:
92887
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Portable Fire Extinguishers
Updated:
2011-07-04 01:02:57
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Portable Fire Extinguishers
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Portable Fire Extinguishers
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  1. What is one extinguishing agent that will not conduct electricity?
    A. Carbon tetrachloride
    B. Aluminum powder
    C. Water with class A foam added
    D. Carbon dioxide
    D. Carbon dioxide
    (this multiple choice question has been scrambled)
  2. Which classes of fire extinguisher include a number in their classification?
    A. B and C
    B. C and M
    C. M and A
    D. A and B
    D. A and B
    (this multiple choice question has been scrambled)
  3. Why would a fire extinguisher class icon have a red slash through it?
    A. Because using the extinguisher on that class
    of fire would be ineffective
    B. Because using the extinguisher on that class
    of fire would create additional risk
    C. Because the use of that type of extinguisher
    on that class has not been tested
    D. Because it is illegal to use that type of
    extinguisher on that class of fire for environmental reasons
    B. Because using the extinguisher on that classof fire would create additional risk
  4. What is another word for when a material begins to burn?
    A. Ignition point
    B. Liquefaction temperature
    C. Flash point
    D. Evolution temperature
    A. Ignition point
    (this multiple choice question has been scrambled)
  5. Why can dry chemical extinguishers be used on class C fires?
    A. Dry chemicals are
    chemically similar to water.
    B. Dry chemicals do not
    conduct electricity.
    C. Dry chemicals never
    actually touch the fuel.
    D. Dry chemicals are themselves electrically
    static.
    B. Dry chemicals do not conduct electricity.
  6. How is the numerical rating of class K
    extinguishers assigned?
    A. On the basis of square feet of burning fuel
    extinguished by an expert
    B. On the basis of square feet of burning fuel
    extinguished by a lay person
    C. On the basis of a mathematical formula and
    the net weight of agent
    D. There is no such rating assigned.
    D. There is no such rating assigned.
  7. What is generally the maximum distance a CO2 extinguisher can be expected to reach?
    A. 32 feet
    B. 16 feet
    C. 8 feet
    D. 4 feet
    C. 8 feet
    (this multiple choice question has been scrambled)
  8. The horns of some older carbon dioxide
    extinguishers are made of a substance that both negates their class C rating and makes them dangerous for use on class C fires. What substance are those older horns made of?
    A. Wood
    B. Bone
    C. Clay
    D. Metal
    D. Metal
    (this multiple choice question has been scrambled)
  9. Bromochlorodifluoromethane, although a big word, should be recognized by fire fighters as a certain type of extinguishing agent. What agent?
    A. MetalX
    B. Halon 1211
    C. Carbon tet
    D. CO2
    B. Halon 1211
    (this multiple choice question has been scrambled)
  10. How many gallons of water are contained in a class A fire extinguisher with a numerical rating of 2?
    A. 2.0
    B. 1.0
    C. 1.5
    D. 2.5
    D. 2.5
    (this multiple choice question has been scrambled)
  11. Fire extinguishers are rated for their ability to control a specific type of fire and their:
    A. ability to prevent rekindling.
    B. overall weight.
    C. ease of use.
    D. reach of agent.
    A. ability to prevent rekindling.
    (this multiple choice question has been scrambled)
  12. According to NFPA 10, the maximum floor area that can be protected by each extinguisher depends on:
    A. the occupancy type.
    B. the water supply.
    C. the building’s history of fire.
    D. the skill of the user.
    A. the occupancy type.
    (this multiple choice question has been scrambled)
  13. How are occupancy use category and hazard classification related?
    A. They are not necessarily related.
    B. Hazard determines occupancy.
    C. Occupancy determines hazard.
    D. They are the same thing.
    A. They are not necessarily related.
    (this multiple choice question has been scrambled)
  14. What extinguishing method is being used when a foam blanket is placed over the surface of a
    burning liquid?
    A. Reflecting evolved heat back into the fire
    B. Cooling the fuel below its kindling temperature
    C. Cutting off the oxygen
    D. Chemically converting the fuel to a non-fuel
    C. Cutting off the oxygen
    (this multiple choice question has been scrambled)
  15. What do the chemicals in multipurpose dry chemical extinguishers do to prevent rekindling of thefuel?
    A. They form a crust overthe fuel.
    B. They form a blanket of foam over the fuel.
    C. They chemically bond to the fuel, making it
    non-combustible.
    D. They do nothing to prevent rekindling.
    • A. They form a crust overthe fuel.
  16. Select the true statement regarding class A and B foam fire extinguishers and their use on the
    unintended class of fire.
    A. Class B extinguishers may be used to some effect on class A fires.
    B. Either extinguisher may be used to some
    C. Class A extinguishers may be used to some effect on class B fires.
    effect on either class of fire.

    D. Neither extinguisher can be used to any
    effect on the other class of fire.
    A. Class B extinguishers may be used to some effect on class A fires.
    (this multiple choice question has been scrambled)
  17. How much of a dry chemical extinguisher’s full load must be used before it requires recharging?
    A. All of it
    B. More than 30%
    C. More than 70%
    D. Any at all
    D. Any at all
    (this multiple choice question has been scrambled)
  18. If a fire extinguisher containing ammonium phosphate is used on a class K fire, not only will it be ineffective, but it can actually worsen the problem. How?
    A. It can neutralize the foaming properties of
    any alkaline agent applied to the fire.
    B. It will evolve hydrogen cyanide gas, a deadly
    and penetrating poison.
    C. It will cause a rapid polymerization,
    resulting in a near-BLEVE expansion of the fuel.
    D. It can cause the fuel to
    heat up internally to reacquire its flash point.
    A. It can neutralize the foaming properties ofany alkaline agent applied to the fire.
  19. Does it matter which type of dry powder
    extinguisher is used on which type of burning metal?
    A. Yes, each type of metal is marked with which
    type of dry powder to use in case of fire.
    B. Yes, each dry powder extinguisher
    is marked with what types of metal it can handle.
    C. No, one dry powder
    extinguisher will work on any kind of metal.
    D. No, one type of metal will respond to any
    type of dry powder.
    • B. Yes, each dry powder extinguisher
    • is marked with what types of metal it can handle.
  20. What can be added to water extinguishers to reduce the surface area of water and thereby to aid in
    extinguishment of fuels such as baled cotton or fibrous materials?
    A. Alkali metal salt
    B. Alcohol
    C. Quick water
    D. Wetting agent
    • D. Wetting agent
  21. What is the weight of
    carbon dioxide in comparison to air?
    A. 0.5
    B. 2.0
    C. 1.5
    D. 1.0
    C. 1.5
    (this multiple choice question has been scrambled)

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