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 pre

题目

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

相似考题

1.How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit

2.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

3.Inerting means ______．A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volumeB.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volumeC.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargoD.All of the above

4.Which method is used to supply inert gas from a flue gas system to the cargo tanks?A.Exhaust gas pressure from the stackB.High capacity fanC.Inert gas compressorD.Natural aspiration

参考答案和解析
正确答案：D
更多“You are discharging cargo and the inert gas system is in operation to inert the tanks. The ”相关问题

  • 第1题：

    The blowers of an inert gas generation system aboard a tanker，will be automatically secured if ______．

    A.Normal water supply at the water seal is lost

    B.The temperature of the inert gas being delivered to the cargo tanks is more than 150℉

    C.The cooling water supply to the scrubbers is lost

    D.All of the above


    正确答案：D

  • 第2题：

    Upon arrival at the discharging port，the inert gas system is ______．

    A.Turned on

    B.Turning on

    C.Turn on

    D.To turn on


    正确答案：A

  • 第3题：

    Which statement about inert gas pressures in a cargo tank is TRUE ________．

    A.The pressures of the inert gas in the tank may create excessive pressure at the pump while discharging

    B.Gas pressures should be maintained at the highest permissible level throughout the discharging process

    C.High gas pressures may cause pyrophoric oxidation in the tank

    D.High gas pressures may cause loss of suction when stripping


    正确答案：B

  • 第4题：

    An inert gas system is designed to reduce the possibility of tank explosions by ______.

    A.eliminating sparks and fire in the vicinity of cargo tanks

    B.removing all hydrocarbon gases from the cargo tanks

    C.blanketing cargo tanks with inert foam

    D.reducing the oxygen concentration below levels necessary for combustion


    正确答案：D
    惰性气体系统用于减少油舱爆炸的可能性是通过降低氧气浓度到低于燃烧必需的水平。

  • 第5题：

    单选题
    The deck water seal of the inert gas system（）.
    A

    cools the inert gas and prevents soot from entering the cargo tanks

    B

    acts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zone

    C

    prevents the backflow of hydrocarbon gasses into nonhazardous areas

    D

    relieves sudden large overpressures in the system


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    An inert gas system is designed to reduce the possibility of tank explosions by（）.
    A

    eliminating sparks and fire in the vicinity of cargo tanks

    B

    removing all hydrocarbon gases from the cargo tanks

    C

    blanketing cargo tanks with inert foam

    D

    reducing the oxygen concentration below levels necessary for combustion


    正确答案： C
    解析： 暂无解析

  • 第7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8题：

    单选题
    Which method is used to supply inert gas from a flue gas system to the cargo tanks?（）
    A

    Exhaust gas pressure from the stack

    B

    High capacity fan

    C

    Inert gas compressor

    D

    Natural aspiration


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    The combined fan discharge rate in an inert gas system is related to the（）.
    A

    shoreside loading rate

    B

    maximum cargo pump discharge rate

    C

    boiler forced draft fan rate

    D

    size of the largest cargo tank


    正确答案： A
    解析： 暂无解析

  • 第10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11题：

    单选题
    The blowers of an inert gas generation system aboard a tanker，will be automatically secured if（）.
    A

    normal water supply at the water seal is lost

    B

    the temperature of the inert gas being delivered to the cargo tanks is more than 150°F

    C

    the cooling water supply to the scrubbers is lost

    D

    all of the above


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    The deck water seal of the inert gas system（）.
    A

    cools the inert gas and prevents soot from entering the cargo tanks

    B

    acts as an emergency shutdown when inlet pressures exceed the safe working pressure

    C

    prevents the backflow of hydrocarbon gasses into nonhazardous areas

    D

    relieves sudden large overpressures in the system


    正确答案： B
    解析： 暂无解析

  • 第13题：

    The deck water seal of the inert gas system ______．

    A.Cools the inert gas and prevents soot from entering the cargo tanks

    B.Acts as an emergency shutdown when inlet pressures exceed the safe working pressure

    C.Prevents the backflow of hydrocarbon gasses into nonhazardous areas

    D.Relieves sudden large overpressures in the system


    正确答案：C

  • 第14题：

    When a non-volatile cargo is carried in a tank that has not been previously gas freed，then that tank shall ______．

    A.be purged with hydrocarbon gas prior to loading

    B.be gas-freed after loading operations

    C.not be maintained in an inert condition

    D.be maintained in an inert condition


    正确答案：D

  • 第15题：

    The venting system shall be provided with devices to prevent the passage of ______ into the cargo tanks．

    A.flame

    B.inert gas

    C.air

    D.oil gas


    正确答案：A

  • 第16题：

    单选题
    During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.
    A

    150 millimeters of water pressure

    B

    125 millimeters of water pressure

    C

    100 millimeters of water pressure

    D

    75 millimeters of water pressure


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Upon arrival at the discharging port, the inert gas system is（）.
    A

    turned on

    B

    turning on

    C

    turn on

    D

    to turn on


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    A cargo tank that is initially gas freed，can be inerted by introducing inert gas by a process known as（）.
    A

    dilution

    B

    displacement

    C

    precipitation

    D

    Either A or B


    正确答案： B
    解析： 暂无解析

  • 第19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20题：

    单选题
    The purpose of the deck seal in an inert gas system is to prevent（）.
    A

    flammable vapors from entering machinery space

    B

    flue gas escaping to atmosphere

    C

    inert gas escaping to atmosphere

    D

    air entering inert gas system


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    The component in an inert gas system used for cleaning the gas of solid and sulphur combustion products，while simultaneously cooling the inert gas，is called the（）.
    A

    filter

    B

    cooler

    C

    scrubber

    D

    purifier


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.
    A

    5% or less

    B

    10% or less

    C

    15% or less

    D

    20% or less


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    （）shall be provided in every cargo tank and slop tank in accordance with the appropriate Resolutions.
    A

    A load on top system

    B

    Direct line system

    C

    Circle line system

    D

    An inert gas system


    正确答案： D
    解析： 暂无解析

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