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 lo

题目

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

相似考题

1.An inert gas system installed on a tanker is designed to ______.A.aid in the stripping and cleaning of cargo tanksB.increase the rate of discharge of cargoC.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphereD.lower the oxygen levels inside cargo tanks，making explosion nearly impossible

2.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

3.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

4.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

更多“An inert gas system on a tanker should be used to ______.A.prevent the generation of flamm ”相关问题

  • 第1题：

    Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．

    A.Cools the inert gas

    B.Maintains the oxygen content at 5% by volume

    C.Drains off static electricity in the inert gas

    D.Maintains the water seal on the gas main


    正确答案：A

  • 第2题：

    The fresh air intake of the inert gas system ______，

    A.Prevents the flue gas from falling below 3% content of oxygen

    B.Allows the inert gas piping to be used for gas freeing the tanks

    C.Opens when there is excessive vacuum on the deck water seal

    D.Enables outside air to mix with and cool hot flue gasses


    正确答案：B

  • 第3题：

    You are planning to use the crude oil washing system on your tanker．What is required to prevent electrostatic buildup in the tanks ________．

    A.The portable machines should be set at the proper drop for the first wash before the fixed machines are used

    B.The tank used as the source for the tank cleaning machines should be debottomed for at least one meter

    C.The inert gas system must reduce the oxygen content in the tank to at least 18%

    D.The fixed machines must be operated simultaneously with the portable machines to equalize the electrostatic potential


    正确答案：B

  • 第4题：

    Which statement is TRUE concerning inert gas systems on tankers ________．

    A.Flue gases from the ship's boilers are used in some systems

    B.The gas is helium

    C.Using the system accelerates the rusting of the tanks

    D.All of the above


    正确答案：A

  • 第5题：

    单选题
    Using an inert gas system on a tanker has which advantage(s)? （）
    A

    Provides for faster loading

    B

    Lowers oxygen content in the tank

    C

    Provides better fuel economy

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    The fresh air intake of the inert gas system（）.
    A

    prevents the flue gas from falling below 3% content of oxygen

    B

    allows the inert gas piping to be used for gas freeing the tanks

    C

    opens when there is excessive vacuum on the deck water seal

    D

    enables outside air to mix with and cool hot flue gasses


    正确答案： D
    解析： 暂无解析

  • 第7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8题：

    单选题
    An inert gas system installed on a tanker is designed to（）.
    A

    aid in the stripping and cleaning of cargo tanks

    B

    increase the rate of discharge of cargo

    C

    force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere

    D

    lower the oxygen levels inside cargo tanks，making explosion nearly impossible


    正确答案： B
    解析： 暂无解析

  • 第9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 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

  • 第11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 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14题：

    Using an inert gas system on a tanker has which advantage（s）________．

    A.Provides for faster loading

    B.Lowers oxygen content in the tank

    C.Provides better fuel economy

    D.All of the above


    正确答案：B

  • 第15题：

    Which statement about the inert gas system is TRUE ________．

    A.Boiler soot blowers should never be used when the IG system is operating

    B.The boiler will produce the best quality of flue gas for the IG system when the boiler load is very light

    C.The boiler will produce the most quantity of flue gas for the IG system when the boiler load is very light

    D.Flue gas with excessive oxygen content is de-oxygenated in the scrubber


    正确答案：A

  • 第16题：

    单选题
    Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon（）.
    A

    cargo pump failure

    B

    blower failure

    C

    deck seal low water level

    D

    low inert gas temperature


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）
    A

    De-energizes the charged mist effect

    B

    Maintains a positive pressure on the vent header to cool the flammable vapors

    C

    Inert gas filters out the flammable vapors from the cargo tank spaces

    D

    Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning?（）.
    A

    Scrubber

    B

    Demister

    C

    Deck water seal

    D

    Final filter


    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
    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21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22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23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

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