One disadvantage of using regular dry chemical（sodium bicarbonate）in firefighting is that ______．A.It can break down under high heat and emit noxious fumesB.It will decompose under prolonged storage and lose its effectivenessC.Fire has been known to flash

题目

One disadvantage of using regular dry chemical（sodium bicarbonate）in firefighting is that ______．

A.It can break down under high heat and emit noxious fumes

B.It will decompose under prolonged storage and lose its effectiveness

C.Fire has been known to flash back over the surface of an oil fire

D.It is ineffective in fighting fires in high-voltage electrical equipment

相似考题

1.The cold and dry climate of Antarctica ______ it one of the toughest places on Earth to live.A、producesB、manufacturesC、doesD、makes

2.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

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 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

更多“One disadvantage of using regular dry chemical(sodium bicarbonate)in firefighting is that ”相关问题

  • 第1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：B
    便携式干粉灭火器通过灭火器内二氧化碳小气瓶的压力来排放药剂。

  • 第2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3题：

    A container ship is one of the （）(干货) ships .

    • A、liquid cargo
    • B、general cargo
    • C、dry cargo
    • D、bulk cargo

    正确答案:C

  • 第4题：

    Company.com is adding HACMP to an existing pair of nodes. One node is using EtherChannel  with only one adapter. The other node is using regular Ethernet connection to the switch. The customer is going to increase the number of network interfaces to two for each node.  What other considerations need to be addressed in a HACMP environment？（）  

    • A、 Al interfaces used for HACMP heartbeats must be identical. Differences in the interfaces will cause heartbeat failure.
    • B、 The network interfaces should all be configured with the same frame type. The use of regular Ethernet frames is mandatory.
    • C、 Network interfaces for HACMP must be all the same，Ethernet or 802.3. It does not matter which，as long as they are all the same.
    • D、 HACMP can use any network interface supported by AIX. The options on the various interfaces are masked by the Ethernet switch and do not affect HACMP.

    正确答案:B

  • 第5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6题：

    单选题
    One disadvantage of using regular dry chemical (sodium bicarbonate) in firefighting is that（）.
    A

    it can break down under high heat and emit noxious fumes

    B

    it will decompose under prolonged storage and lose its effectiveness

    C

    fire has been known to flash back over the surface of an oil fire

    D

    it is ineffective in fighting fires in high-voltage electrical equipment


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    Flames from small leaks of LFG may be extinguished by（）.
    A

    utilizing carbon dioxide or dry chemical fire extinguishers

    B

    utilizing soda and acid fire extinguishers

    C

    blowing the flames out

    D

    letting it burn itself out


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    One potential danger is（）the information could be used by others to your disadvantage.
    A

    that

    B

    what

    C

    it

    D

    which


    正确答案： A
    解析： 暂无解析

  • 第9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10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11题：

    单选题
    A disadvantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it is （）.
    A

    heavy

    B

    easily damaged

    C

    affected by temperature

    D

    costly relative to the strength ratio


    正确答案： B
    解析： 暂无解析

  • 第12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：

    One potential danger is（）the information could be used by others to your disadvantage.

    Athat

    Bwhat

    Cit

    Dwhich


    A
    略

  • 第15题：

    Which of the following is a disadvantage of using the EIGRP protocol?（）

    • A、It does not scale well
    • B、It converges slower than OSPF
    • C、It is a proprietary protocol
    • D、It is a distance vector protocol

    正确答案:C

  • 第16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17题：

    单选题
    As compared to carbon dioxide，dry chemical has which advantage?（）.
    A

    Cleaner

    B

    Effective on metal fires

    C

    Greater range

    D

    More cooling effect


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Dry chemical extinguishers extinguish class B fires to the greatest extent by（）.
    A

    cooling

    B

    smothering

    C

    oxygen dilution

    D

    breaking the chain reaction


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    In Recovery Manager （RMAN）， you are taking image copies of the data files of your production database and rolling them forward at regular intervals. You attempt to restart your database. After a regular maintenance task， you realize that one of the data files that belongs to the USERS tablespace is damaged and you need to recover the data file by using the image copy. Because a media failure caused the data file to be damaged， you want to place the data file in a different location while resto ing the file.  Which option must you consider for this task？（）
    A

     using only the RMAN SWITCH command to set the new location for the data file

    B

     placing the database in the MOUNT state for the restore and recovery operations

    C

     using an RMAN RUN block with the SET NEWNAME and then the SWITCH command

    D

     configuring two channels： one for the restore operation and the other for the recovery operation


    正确答案： B
    解析： 暂无解析

  • 第20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21题：

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

    greater range

    B

    effective on all types of fires

    C

    cleanliness

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    As compared to carbon dioxide,dry chemical has which advantage?（）.
    A

    Cleaner

    B

    Effective

    C

    Greater range

    D

    More cooling effect


    正确答案： A
    解析： 暂无解析

  • 第23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24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

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