You are testing a tank that contained gasoline by using a combustible gas indicator．Under testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．A.Less than the fl

题目

You are testing a tank that contained gasoline by using a combustible gas indicator．Under testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．

A.Less than the flammable range

B.Within the flammable range

C.Over the flammable range

D.The explosimeter is defective and giving a false reading

相似考题

1.Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.A.Orsat apparatusB.flame safety lampC.Halide torchD.combustible gas indicator

2.You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take?A.Cut in another IG fan to increase gas flowB.Open the pressure control valve until the pressure increasesC.Open the tank isolation valve to the fully open positionD.Reduce the pumping rate

3.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

4.An inert gas system on a tanker should be used to ______.A.prevent the generation of flammable or combustible gas in tanksB.blow out cargo lines to prevent the build up of gas concentrationsC.dilute tank atmospheres to keep gas concentrations below the lower explosive limitD.prevent fires in the pumproom by continually displacing flammable vapors

更多“You are testing a tank that contained gasoline by using a combustible gas indicator.Under ”相关问题

  • 第1题：

    While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then ______.

    A.enter the tank safely

    B.suspect the accuracy of the reading

    C.ventilate the tank

    D.test for nitrogen


    正确答案：B

  • 第2题：

    What is used to test a tank for oxygen content ________．

    A.Combustible gas indicator

    B.Vapor indicator

    C.Atmosphere analyzer kit

    D.None of the above


    正确答案：D

  • 第3题：

    Gasoline fuel tank vents should terminate ______．

    A.In the engine compartment

    B.In the fuel tank space

    C.Above or outside the hull

    D.At the most convenient location


    正确答案：C

  • 第4题：

    You are moving a gas free tank barge to dry dock for repairs．The barge must have onboard a valid ______．

    A.Gas Free Certificate

    B.Certificate of Inspection

    C.Permit to Proceed and Hot Work Permit

    D.All of the above


    正确答案：B

  • 第5题：

    单选题
    The shut off valve at the gasoline tank which can be operated from outside the tank space （）.
    A

    controls the amount of gasoline to the engine

    B

    shuts off the gasoline supply at the tank

    C

    is used if the gasoline tank leaks

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    Before starting a gasoline engine on a motorboat，you should make sure for safety that（）.
    A

    the gasoline tank is full

    B

    the bilges，cabins，etc. are thoroughly ventilated

    C

    you have fresh water on board

    D

    Each of the above is followed


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    What action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?（）
    A

    The tank must be gas freed

    B

    The tank must be ballasted

    C

    The tank must be vented to the atmosphere

    D

    The bypass valve must also be closed


    正确答案： A
    解析： 暂无解析

  • 第8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9题：

    单选题
    Inerting means（）.
    A

    the introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume

    B

    the introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume

    C

    the introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo

    D

    All of the above


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    Gasoline fuel tank vents should terminate（）.
    A

    in the engine compartment

    B

    in the fuel tank space

    C

    above or outside the hull

    D

    at the most convenient location


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.
    A

    enter the tank safely

    B

    suspect the accuracy of the reading

    C

    ventilate the tank

    D

    test for nitrogen


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    An inert gas system on a tanker should be used to（）.
    A

    prevent the generation of flammable or combustible gas in tanks

    B

    blow out cargo lines to prevent gas concentrations

    C

    dilute tank atmospheres to keep gas concentrations below the lower explosive limit

    D

    prevent fires in the pumproom by continually displacing flammable vapors


    正确答案： D
    解析： 暂无解析

  • 第13题：

    Before starting a gasoline engine on a motorboat，you should make sure for safety that ______．

    A.The gasoline tank is full

    B.The bilges，cabins，etc．are thoroughly ventilated

    C.You have fresh water on board

    D.Each of the above is followed


    正确答案：B

  • 第14题：

    You are in a tank wearing the self-contained breathing apparatus and you desire to return topside．How many tugs of the lifeline mean to take up the slack ________．

    A.One

    B.Two

    C.Three

    D.Four


    正确答案：C

  • 第15题：

    Inerting means ______．

    A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume

    B.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume

    C.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo

    D.All of the above


    正确答案：D

  • 第16题：

    Combustible gas indicators measure the presence of combustible gas as a percentage of the____.

    A.flash point

    B.upper explosive limit

    C.lower explosive limit

    D.fire point


    正确答案：C
    易燃气体检测仪测量存在的易燃气体占爆炸下限浓度的百分比。

  • 第17题：

    单选题
    What is NOT a responsibility of the tankerman in charge of loading an unmanned tank barge? （）
    A

    Enforcement of smoking restrictions

    B

    Restricting vessels from coming alongside the barge

    C

    Insuring that a combustible gas indicator is aboard

    D

    Protecting cargo hose with chafing gear


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases? （）
    A

    In the lower level of the pumproom

    B

    In the middle level of the pumproom

    C

    In the upper level of the pumproom

    D

    On the deck outside the pumproom


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take? （）
    A

    Cut in another IG fan to increase gas flow

    B

    Open the pressure control valve until the pressure increases

    C

    Open the tank isolation valve to the fully open position

    D

    Reduce the pumping rate


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.
    A

    flash point

    B

    upper explosive limit

    C

    lower explosive limit

    D

    fire point


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    A diesel engine crankcase ventilation system （）
    A

    prevents spark generation

    B

    removes combustible gases

    C

    determines the level of combustible gases

    D

    provides inert gas generation in crankcase


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Before entering a tank，always check the vapor content（）a combustible gas indicator.
    A

    with

    B

    by

    C

    of

    D

    for


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    An inert gas system on a tanker should be used to（）.
    A

    prevent the generation of flammable or combustible gas in tanks

    B

    blow out cargo lines to prevent the build up of gas concentrations

    C

    dilute tank atmospheres to keep gas concentrations below the lower explosive limit

    D

    prevent fires in the pumproom by continually displacing flammable vapors


    正确答案： C
    解析： 暂无解析

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