Foam is a very effective smothering agent and ______.A.it provides cooling as a secondary effectB.works well on extinguishing electrical firesC.can be used to combat combustible metal firesD.All of the above

题目

Foam is a very effective smothering agent and ______.

A.it provides cooling as a secondary effect

B.works well on extinguishing electrical fires

C.can be used to combat combustible metal fires

D.All of the above

相似考题

1.One of the limitations of foam as an extinguishing agent is that foam ______.A.cannot be made with salt waterB.is heavier than oil and sinks below its surfaceC.is corrosive and a hazard to fire fightersD.conducts electricity

2.______, as the chemical extinguisher agent, should be used for an electric fire.A.dry chemical or foamB.foam or soda acidC.carbon dioxide or foamD.carbon dioxide or dry chemical

3.As an extinguishing agent, foam ______.A.conducts electricityB.should be directed at the base of the fireC.is most efffective on buring gases which are flowingD.extinguishes by cooling oil fires below ignition temperature

4.Carbon dioxide as a fire fighting agent has which advantage over other agents?A.It causes minimal damageB.It is safer for personnelC.It is cheaperD.It is most effective on a per unit basis

参考答案和解析
正确答案：A
泡沫是非常有效的窒息剂和它提供一般的冷却效果。
更多“Foam is a very effective smothering agent and ______.A.it provides cooling as a secondary ”相关问题

  • 第1题：

    Firefighting foam is only effective when the foam _____.

    A.penetrates to the bottom of the fire

    B.is kept saturated with low-velocity water fog

    C.mixes with the burning fuel oil

    D.completely covers the top of the burning liquid


    正确答案：D
    泡沫灭火仅在当泡沫完全覆盖在燃烧液体的上面时才有效。

  • 第2题：

    Halon extinguishes a fire by ______.

    A.breaking the chain reaction

    B.smothering the fire

    C.cooling the fire

    D.coating the fuel with a nonflammable surface


    正确答案：A
    卤化烃灭火主要时通过打破（燃烧）作用链。

  • 第3题：

    Which of the following components provides for the BEST hardware cooling features？（）

    • A、 Epoxy paste
    • B、 Chip fan
    • C、 Heat sink
    • D、 Virtualization

    正确答案:B

  • 第4题：

    单选题
    Which extinguishing agent is effective in combating an isoprene fire?（）
    A

    Dry chemicals

    B

    CO2

    C

    Foam

    D

    All the above


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    What is an advantage of using foam in fire fighting?（）
    A

    It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)

    B

    Most foams can be used with dry chemicals to attack a fire by two methods

    C

    Foam is effective on combustible metal fires

    D

    Foam can be made with seawater or fresh water


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    The blocking or absence of fire dampers can cause（）.
    A

    the accumulation of explosive gases

    B

    faster cooling of the fire

    C

    the fire to spread through the ventilation system

    D

    fixed foam systems to be ineffective


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Water is a very effective fire extinguishing agent because it（）
    A

    will remove all the toxic fumes from the air

    B

    has the greatest cooling ability

    C

    will leave no harmful residue

    D

    completely removes combustible vapors from the air


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    As an extinguishing agent，foam（）.
    A

    conducts electricity

    B

    should be directed at the base of the fire

    C

    is most effective on burning gases which are flowing

    D

    extinguishes by cooling oil fires below ignition temperature


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）
    A

    The agent is considered nontoxic at room temperature in low concentrations

    B

    The agent is less effective than carbon dioxide

    C

    Halon primarily extinguishes the fire by cooling

    D

    The agent cannot be used on electrical fires because it leaves a residue


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    0ne of the limitations of foam as an extinguishing agent is that foam（）.
    A

    cannot be made with salt water

    B

    is heavierthan oil and sinks below its surface

    C

    is corrosive and to fire fighters

    D

    conducts electricity


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Which extinguishing agent is most effective on a mattress fire?（）
    A

    CO2

    B

    Foam

    C

    Dry Chemical

    D

    Water


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Firefighting foam is only effective when the foam（）.
    A

    penetrates to the bottom of the fire

    B

    is kept saturated with low-velocity water fog

    C

    mixes with the burning fuel oil

    D

    completely covers the top of the burning liquid


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Foam extinguishes a fire by ______.

    A.shutting off the air supply

    B.cooling the fuel to below ignition temperature

    C.dispersing the fuel

    D.removing the source of ignition


    正确答案：A
    泡沫灭火通过切断空气供给。

  • 第14题：

    How does foam extinguish an oil fire ?______.

    A.By cooling the oil below the ignition temperature

    B.By removing the fuel souce from the fire

    C.By excluding the oxygen from the fire

    D.By increasing the weight of the oil


    正确答案：C
    泡沫灭火器时怎样灭油火的？通过释放泡沫隔绝空气。

  • 第15题：

    船舶物料商通常给船上供应物料和食品。（）

    • A、The agent usually provides stores and provisions to the ship.
    • B、The shipyard usually provides stores and provisions to the ship.
    • C、The ship chandler usually provides stores and provisions to the ship.
    • D、The captain usually provides stores and provisions to the ship

    正确答案:C

  • 第16题：

    单选题
    Portable foam type fire extinguishers are most effective on（）.
    A

    mattress fires

    B

    oil fires

    C

    wood fires

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    What is an advantage of using foam in fire fighting?（）
    A

    It is effective in controlling fire in flowing oil such as coming from a broken fuel line

    B

    It absorbs heat from materials that could cause reignition

    C

    Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishment

    D

    Once the surface is blanketed with foam and the fire is extinguished，no further foam is required


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    Which statement about firefighting foam is TRUE?（）
    A

    Foam conducts electricity

    B

    To be most effective，foam should be directed at the base of the fire

    C

    Foam is most effective on burning liquids which are flowing

    D

    Foam can ONLY be used to extinguish class A fires


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    Which fire extinguishing agent can NOT be used on an ethylenediamine?（）
    A

    Water foam

    B

    Dry chemical powder

    C

    Water fog

    D

    Alcohol foam


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    As to the piston cooling, of the following, which statement is not true?（）
    A

    Because the piston is exposed to very high temperature, it must be cooled

    B

    The lower the piston cooling temperature is, the better it is

    C

    Both water and lube oil can be used as coolant

    D

    One of the piston cooling methods is vibration cooling, with better effect


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）
    A

    Carbon dioxide is corrosive when exposed to fire

    B

    Carbon dioxide should be applied slowly to a large engine room fire

    C

    Its total cooling effect is far greater than water

    D

    Its smothering effect is excellent for class B fires


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Blocking open or removing fire dampers can cause（）.
    A

    fixed foam systems to be ineffective

    B

    faster cooling of the fire

    C

    the accumulation of explosive gases

    D

    the fire to spread through the ventilation system


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Foam is a very effective smothering agent and（）.
    A

    it provides cooling as a secondary effect

    B

    works well on extinguishing electrical fires

    C

    can be used to combat combustible metal fires

    D

    All of the above


    正确答案： C
    解析： 暂无解析

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