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CO2 extinguishes a fire by __________.A.a blanket of bubbles formed on the surface of the fireB.smotheringC.isolating the heat from the fuelD.cooling

题目

CO2 extinguishes a fire by __________.

A.a blanket of bubbles formed on the surface of the fire

B.smothering

C.isolating the heat from the fuel

D.cooling

相似考题

1.According to the passage, which is true about the ocean?A. The waters of the ocean came from rain water.B. The ocean was formed from the, lighter rock materials.C. The vast single ocean formed about 200 million years ago.D. The ocean covered the whole surface of the earth at very beginning.

2.The most effective way to apply a foam stream if the fire is on deck or is a runing fire, is to direct the stream ______.A.onto the surface of the burning liquidB.ahead of the burning liquid and bounce it on the fireC.at the base of the burning liquid in a sweeping motionD.just above the surface of the burning liquid

3.CO2 extinguishes a fire byA.a blanket of bubbles formed on theB.smotheringC.coolingD.isolating the heat from the fuel

4.The BEST method of applying foam to a fire is to ______.A.spray directly on the base of the fireB.flow the foam down a nearby vertical surfaceC.sweep the fire with the foamD.spray directly on the surface of the fire

更多“CO2 extinguishes a fire by __________.A.a blanket of bubbles formed on the surface of the ”相关问题

  • 第1题：

    Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.

    A.refrigerant bubbles in the lube oil

    B.refrigerant reducing the lube oil viscosity

    C.oxidation(氧化) of the lube oil from overheating

    D.reducing the floc or cloud point of the oil


    正确答案：C

  • 第2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3题：

    CO2 and Halon extinguishers are used for electrical fire, as well as （）fire.

    • A、common
    • B、oil
    • C、electrical
    • D、chemical

    正确答案:B

  • 第4题：

    单选题
    What is meant by the term overhaul in firefighting?（）
    A

    Slow down the spread of fire by cooling adjacent structures

    B

    Cover the fire with foam

    C

    Smother the fire with a blanket or similar object

    D

    Break up solid objects to ensure that any deep seated fires are extinguished


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）
    A

    Dry chemical

    B

    Halon

    C

    Low velocity fog

    D

    Steam


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    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
    解析： 暂无解析

  • 第7题：

    单选题
    The usual method of effectively applying foam on a fire is by （）.
    A

    spraying directly on the base of the fire

    B

    flowing the foam down a vertical surface

    C

    sweeping the fire before you with the foam

    D

    spraying directly on the surface of the fire


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    When fighting an electrical fire, you should first （）.
    A

    stop ventilation to the area

    B

    stop the vessel

    C

    secure electricity to the circuit

    D

    apply CO2 to the fire


    正确答案： D
    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
    Foam extinguishes a fire mainly by（）.
    A

    cooling

    B

    chemical action

    C

    smothering

    D

    inerting the air


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    CO2 extinguishes a fire by （）.
    A

    a blanket of bubbles formed on the surface of the fire

    B

    smothering

    C

    cooling

    D

    isolating the heat from the fuel


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）
    A

    Use the CO2 system and evacuate the engine room

    B

    Use the fire main system and evacuate the engine room

    C

    Evacuate the engine room and use the CO2 system

    D

    Evacuate the engine room and use the fire main system


    正确答案： C
    解析： 暂无解析

  • 第13题：

    An ABC dry chemical fire extinguisher would be LEAST effective against a fire in ______.

    A.a mattress

    B.spilled liquids such as oil or paint

    C.high voltage electrical gear

    D.a trash can


    正确答案：A
    干粉灭火机对席子着火的扑救效果最差。

  • 第14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15题：

    单选题
    C02 extinguishes a fire by（）.
    A

    cooling

    B

    smothering

    C

    chemical action

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第16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17题：

    单选题
    The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.
    A

    secure all openings to the tank

    B

    discharge an initial charge of CO2 with a hand portable extinguisher

    C

    direct a fire hose into the tank and energize the fire main

    D

    spray the tank boundaries with a fire hose to promote cooling


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.
    A

    air from contacting the oil vapors

    B

    permitting re-ignition boiling of the heated oil

    C

    spontaneous combustion below the oil surface

    D

    toxic fumes from escaping to the surface


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    The BEST method of applying foam to a fire is to（）.
    A

    spray directly on the base of the fire

    B

    flow the foam down a nearby vertical surface

    C

    sweep the fire with the foam

    D

    spray directly on the surface of the fire


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    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： C
    解析： 暂无解析

  • 第21题：

    单选题
    Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of （）
    A

    refrigerant bubbles in the lube oil

    B

    refrigerant reducing the lube oil viscosity

    C

    oxidation of the lube oil from overheating

    D

    reducing the floc or cloud point of the oil


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Halon extinguishes fire primarily by（）.
    A

    cooling

    B

    smothering

    C

    shielding of radiant heat

    D

    breaking the chain reaction


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    CO2 extinguishes a fire by（）.
    A

    cooling

    B

    smothering

    C

    chemical action

    D

    All of the above


    正确答案： C
    解析： 暂无解析

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