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

题目

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

相似考题

1.What is the best instrument for establishing a safe working area before welding in a confined space?A.An oxygen indicatorB.A combustible gas indicatorC.A combination combustible gas and oxygen indicatorD.A flame safety lamp

2.Which instrument is suitable for determining the presence of explosive concentrations of fuel oil vapors in tanks ________．A.A flame safety lampB.A combustible gas indicatorC.A liquid cargo meterD.All of the above

3.An oxygen indicator can be used to determine if there is ______.A.sufficient oxygen in a compartment to support lifeB.combustible gases presentC.hyfrogen gases presentD.All of the above

4.Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．A.Cools the inert gasB.Maintains the oxygen content at 5% by volumeC.Drains off static electricity in the inert gasD.Maintains the water seal on the gas main

更多“An extinguishing agent which effectively cools, dilutes combustible vapors, removes oxygen ”相关问题

  • 第1题：

    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


    正确答案：A
    对于灭火剂，泡沫灭火剂导电。

  • 第2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：A
    泡沫是非常有效的窒息剂和它提供一般的冷却效果。

  • 第3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4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5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6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7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8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9题：

    单选题
    Deficient oxygen content inside a chain locker can be detected with（）.
    A

    litmus paper

    B

    a combustible gas indicator

    C

    an oxygen breathing apparatus

    D

    an oxygen indicator


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    Which condition is necessary for a substance to burn?（）
    A

    The temperature of the substance must be equal to or above its fire point

    B

    The air must contain oxygen in sufficient quantity

    C

    The mixture of vapors with air must be within the explosive range

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第11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：

    Deficient oxygen content inside a chain locker can be detected with ______.

    A.litmus paper

    B.a combustible gas indicator

    C.an oxygen breathing apparatus

    D.an oxygen indicator


    正确答案：D
    锚链舱内的氧气不足能够被测氧仪检测到。

  • 第14题：

    Which of the following methods effectively removes data from a hard drive prior to disposal？（）

    • A、Use the remove hardware OS feature
    • B、Formatting the hard drive
    • C、Physical destruction
    • D、Degauss the drive
    • E、Overwriting data with 1s and 0s by utilizing software

    正确答案:C,E

  • 第15题：

    多选题
    Which of the following methods effectively removes data from a hard drive prior to disposal？（）
    A

    Use the remove hardware OS feature

    B

    Formatting the hard drive

    C

    Physical destruction

    D

    Degauss the drive

    E

    Overwriting data with 1s and 0s by utilizing software


    正确答案： C,E
    解析： 暂无解析

  • 第16题：

    单选题
    A combustible gas indicator is used to determine （）.
    A

    if there is sufficient oxygen to support life

    B

    the toxicity of flammable gases or vapors

    C

    the amount of CO2 present in flue gas

    D

    the presence of flammable gases or vapors in the air


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    A tank which has been sealed for a long period of time can be dangerous because （）.
    A

    steel surfaces consume oxygen by rusting

    B

    sealed tanks usually form a vacuum

    C

    moisture condenses in the tank, displacing the oxygen

    D

    most tank coatings give off poisonous vapors in the presence of moisture


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    Which extinguishing agent is best for use on a magnesium fire?（）
    A

    Water

    B

    Sand

    C

    CO2

    D

    Dry chemical


    正确答案： A
    解析： 暂无解析

  • 第19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20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21题：

    单选题
    The primary method by which water spray puts out fires is by（）.
    A

    removing the oxygen

    B

    cooling the fire below the ignition temperature

    C

    removing combustible material

    D

    diluting combustible vapors


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.
    A

    purifies

    B

    combinations

    C

    concentrations

    D

    filters


    正确答案： C
    解析： 暂无解析

  • 第23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

相关内容