A portable dry chemical fire extinguisher discharges by ______.A.gravity when the extinguisher is turned upside downB.pressure from a small CO2 cartridge on the extinguisherC.air pressure from the hand pump attached to the extinguisherD.pressure from the

题目

A portable dry chemical fire extinguisher discharges by ______.

A.gravity when the extinguisher is turned upside down

B.pressure from a small CO2 cartridge on the extinguisher

C.air pressure from the hand pump attached to the extinguisher

D.pressure from the reaction when water is mixed with the chemical

相似考题

1.Which of the following is (are)an advantage of a dry chemical extinguisher over a carbon dioxide extinguisher？The dry chemical extinguisher：Ⅰ．Has a greater range．Ⅱ．Provides a heat shield for the operator．A.ⅠonlyB.ⅡonlyC.Both Ⅰand ⅡD.Neither Ⅰ nor Ⅱ

2.Which statement concerning the application of dry chemical powder is FALSE ________．A.At temperatures of less than 32℉，the extinguisher must be recharged more oftenB.When possible，the fire should be attacked from windwardC.The stream should be directed at the base of the fireD.Directing the stream into burning flammable liquid may cause splashing

3.______, 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

4.Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?A.Test the pressure gauge for correct readingB.Weigh the cartridgeC.Replace the dry chemicalD.Pressure test the discharge hose

更多“A portable dry chemical fire extinguisher discharges by ______.A.gravity when the extingui ”相关问题

  • 第1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2题：

    An advantage of an ABC dry chemical over a carbon dioxide fire extinguisher is ______.

    A.lack of toxicity

    B.the multipurpose extinguishing ability

    C.burn-back protection

    D.cooling ability


    正确答案：B
    ABC干粉灭火器较二氧化碳灭火器时一个多功能灭火器。

  • 第3题：

    Close all fire doors and use the （）（干粉灭火器）.

    • A、dry powder extinguisher
    • B、foam extinguisher
    • C、CO2 extinguisher
    • D、portable extinguisher

    正确答案:A

  • 第4题：

    单选题
    When must a dry chemical fire extinguisher be recharged?（）
    A

    After each use

    B

    When the air temperature exceeds 90°F

    C

    Every 6 months

    D

    Every 12 months


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    （）as the chemical extinguisher agent, should be used for a an electric fire.
    A

    Dry chemical or foam

    B

    Foam or soda acid

    C

    carbon dioxide or foam

    D

    carbon dioxide or dry chemical


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    On a class B fire，which portable fire extinguisher would be the LEAST desirable?（）
    A

    Carbon dioxide

    B

    Water (stored pressure)

    C

    Dry chemical

    D

    Foam


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    A portable dry chemical fire extinguisher discharges by（）.
    A

    gravity when the extinguisher is turned upside down

    B

    pressure from a small CO2 cartridge on the extinguisher

    C

    air pressure from the hand pump attached to the extinguisher

    D

    pressure from the reaction when water is mixed with the chemical


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    Which types of portable extinguisher should you watch for the reflash of the fire?（）
    A

    foam and water

    B

    CO2 and dry chemical

    C

    dry chemical and water

    D

    foam and CO2


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
    A

    authorized fire equipment servicing personnel only

    B

    replacing the propellent cartridge and refilling with powder

    C

    puncturing the cartridge seal after installation

    D

    recharging the cartridge and refilling it with powder


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）
    A

    Check the tag to see when the extinguisher was last charged

    B

    Release a small amount of CO2; if the CO2 discharges，the extinguisher is acceptable

    C

    Weigh the extinguisher and compare the weight against that stamped on the valve

    D

    Recharge the extinguisher at least once each year


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.
    A

    over the top of the flames

    B

    off a bulkhead into the fire

    C

    in front of the fire

    D

    at the base of the fire


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Dry chemical fire extinguishers are effective on which type(s) of fire?（）
    A

    Burning oil

    B

    Electrical

    C

    Paint

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第13题：

    An advantage of a dry chemical over a carbon dioxide fire extinguisher is its ______.

    A.greater range

    B.effectiveness on all types of fires

    C.cleanliness

    D.All of the above


    正确答案：A
    干粉灭火器优于CO2灭火器的优点是它更远的作用距离。

  • 第14题：

    Fire in the cabins. Close all fire doors and use the （）powder extinguisher.

    • A、dry
    • B、wet
    • C、foam
    • D、portable

    正确答案:A

  • 第15题：

    单选题
    Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）
    A

    Test the pressure gauge for correct reading

    B

    Weigh the cartridge

    C

    Replace the dry chemical

    D

    Pressure test the discharge hose


    正确答案： D
    解析： 暂无解析

  • 第16题：

    单选题
    A foam-type portable fire extinguisher is most useful in fighting a fire in（）.
    A

    generators

    B

    oil drums

    C

    the bridge controls

    D

    combustible metals


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    Which portable fire extinguisher should be used on a class C fire on board a vessel?（）
    A

    Carbon dioxide

    B

    Water (stored pressure)

    C

    Foam

    D

    Carbon tetrachloride


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    The type of extinguisher which should be used for an electricity fire is（）.
    A

    foam or soda acid

    B

    dry chemical or foam

    C

    carbon dioxide or dry chemical

    D

    carbon dioxide or foam


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    关闭所有防火门并使用干粉灭火器。（）
    A

    Close all fire doors and use the dry powder extinguisher.

    B

    Close all fire doors and use the foam extinguisher.

    C

    Close all fire doors and use the CO2 extinguisher.

    D

    Close all fire rooms and use the dry powder extinguisher.


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）
    A

    Insure the chemical is powdery

    B

    Replace the cartridge

    C

    Pressure test the discharge hose

    D

    Test the pressure gauge for proper operation


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    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
    解析： 暂无解析

  • 第22题：

    单选题
    Which portable fire extinguisher is normally recharged in a shore facility?（）
    A

    Dry chemical (cartridge-operated)

    B

    Water (cartridge-operated)

    C

    Water (pump tank)

    D

    Carbon dioxide


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    An advantage of a dry chemical over a carbon dioxide fire extinguisher is its（）.
    A

    greater range

    B

    effectiveness on all types of fires

    C

    cleanliness

    D

    All of the above


    正确答案： A
    解析： 暂无解析

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