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

题目

As an extinguishing agent, foam ______.

A.conducts electricity

B.should be directed at the base of the fire

C.is most efffective on buring gases which are flowing

D.extinguishes by cooling oil fires below ignition temperature

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.An extinguishing agent which effectively cools, dilutes combustible vapors, removes oxygen, and provides a heat and smoke screen is ______.A.carbon dioxideB.Halon 1301C.dry chemicalD.water fog

3.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

4.______, 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

更多“As an extinguishing agent, foam ______.A.conducts electricityB.should be directed at the b ”相关问题

  • 第1题：

    Generally, the first action in extinguishing an LFG fire caused by escaping gas is to ______.

    A.sweep flames away with water spray

    B.shut off the leak

    C.use a chemical foam fire extinguisher

    D.call the local fire department


    正确答案：B
    一般来说，在灭因气体泄漏而引起的火灾中，首先要关闭泄漏处。

  • 第2题：

    单选题
    Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）
    A

    Alcohol foam

    B

    Dry chemical

    C

    Chemical foam

    D

    Water fog


    正确答案： C
    解析： 暂无解析

  • 第3题：

    单选题
    A class B fire is most successfully fought by（）.
    A

    preventing oxygen from reaching the burning material

    B

    cooling the burning material below its ignition temperature

    C

    using the extinguishing agent to make the burning material fire-resistant

    D

    using the extinguishing agent to absorb the heat


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent （）.
    A

    Class A and class B

    B

    Class B and class C

    C

    Class A and class C

    D

    Class C, class D, and class E


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    Generally, the first action in extinguishing an LFG fire caused by escaping gas is to（）.
    A

    sweep flames away with water spray

    B

    shut off the leak

    C

    use a chemical foam fire extinguisher

    D

    call t e local fire department


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    Which extinguishing agent is the best for use on electrical fires?（）
    A

    Foam

    B

    CO2

    C

    Dry chemical

    D

    Water fog


    正确答案： D
    解析： 暂无解析

  • 第7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8题：

    单选题
    Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?（）
    A

    Foam

    B

    Carbon dioxide

    C

    Dry chemical

    D

    Water fog


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    What is the most important characteristic of the extinguishing agent in fighting a class C fire?（）
    A

    Weight

    B

    Temperature

    C

    Electrical nonconductivity

    D

    Cost


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    An extinguishing agent which effectively cools，dilutes combustible vapors，removes oxygen，and provides a heat and smoke screen is（）.
    A

    carbon dioxide

    B

    Halon 1301

    C

    dry chemical

    D

    water fog


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.
    A

    sweep flames away with water spray

    B

    shut off the leak

    C

    use a chemical foam fire extinguisher

    D

    call the local fire department


    正确答案： D
    解析： 暂无解析

  • 第12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

  • 第13题：

    单选题
    Production of mechanical foam by a portable in-line foam proportioner（）.
    A

    increases the size of foam bubbles formed

    B

    increases the rate of foam production

    C

    improves the extinguishing properties of foam

    D

    gives the nozzleman more freedom of movement，since it can be placed anywhere in the hose line


    正确答案： A
    解析： 暂无解析

  • 第14题：

    单选题
    On a bulk chemical carrier，water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with the chemical called（）.
    A

    acrylic acid

    B

    benzene

    C

    oleum

    D

    vinyl toluene


    正确答案： C
    解析： 暂无解析

  • 第15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16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17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18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19题：

    单选题
    Which extinguishing agent will cool down a heated bulkhead in the least amount of time?（）
    A

    Water stream

    B

    Water fog or apray

    C

    Steam

    D

    Dry chemical


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    The best method of extinguishing a class A fire is to（）.
    A

    remove oxygen from the area

    B

    cool fuel below ignition temperature

    C

    smother with CO2

    D

    smother fire with foam


    正确答案： D
    解析： 暂无解析

  • 第21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22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23题：

    单选题
    Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.
    A

    coaming

    B

    alarm

    C

    drain

    D

    fire sensor


    正确答案： C
    解析： 暂无解析

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