Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?A.Each vent for the tank must be equal to the area of the tank filling lineB.The tanks must be protected by overflowsC.The total area of the vents or the overf

题目

Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?

A.Each vent for the tank must be equal to the area of the tank filling line

B.The tanks must be protected by overflows

C.The total area of the vents or the overflow shall be at least equal to the area of the fill line

D.There must be twice as much vent area as the area of the fill line

相似考题

1.When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it ______.A.one meter from the tank bottom and one meter below the tank topB.one half the ullage of the tank and one meter below the tank topC.one half the ullage of the tank and one meter above the tank bottomD.at three meter intervals from the tank top to the bottom

2.You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE?A.Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleanedB.The hoses to portable cleaning machines should be disconnected before the machines are removed from the tankC.The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residueD.Steam cleaning and water washing are both capable of generating electrostatic charges within a tank

3.You are on a cargo vessel carrying toluol in bulk in portable tanks. Which is a requirement for pumping the toluol?A.Hose connections to the tank must be made with a minimum of three boltsB.There must be water pressure on the fire mainC.You must shut down if another vessel comes alongsideD.If transferring at anchor，you must display a red flag by day and a red light at night

4.Which 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 freedB.The tank must be ballastedC.The tank must be vented to the atmosphereD.The bypass valve must also be closed

更多“Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?A.Each vent for the tank must be equal to the area of the tank filling lineB.The tanks must be protected by overflowsC.The total area of the vents or the overf”相关问题

  • 第1题：

    You are loading a cargo tank on your container ship. The tank displays the red label shown. Which statement is TRUE?

    A.The tank contains propylene

    B.The tank's volume is 1077 cubic feet

    C.There are three tanks in the shipment

    D.The tank contains an oxidizing material


    正确答案：A

  • 第2题：

    Which operation may cause the pressure in an inert tank to fall below the prescribed limits ________．

    A.Loading

    B.Discharging

    C.Crude oil washing

    D.Steaming tanks


    正确答案：B

  • 第3题：

    Which statement is TRUE concerning cargo hose on tank barges ________．

    A.Cargo hose must be able to withstand the shut-off head plus the static head of the cargo pump

    B.Cargo hose must be able to withstand the static head of the cargo pump but no less than 100 psi

    C.Cargo hose must be able to withstand the shut-off head less the static head of the cargo pump but no less than 100 psi

    D.Cargo hose must be able to withstand at least 150 psi


    正确答案：D

  • 第4题：

    单选题
    In a commonly used fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.
    A

    a service tank

    B

    a settling tank

    C

    an expansion tank

    D

    a double bottom tank


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    Fuel oil tank vents are fitted with a screen which will stop（）.
    A

    oil from flowing out of the tank vent

    B

    air from entering the tank vent

    C

    vapors from leaving the tank vent

    D

    flames on deck from entering the tank vent


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    水泥涂料用于淡水舱和双层底舱。（）
    A

    Primer is used for sea water tanks and double bottom tanks.

    B

    Cement wash is used for fresh water tanks and double bottom tanks.

    C

    Varnish is used for fresh water tanks and double bottom tanks.

    D

    Bitumen is used for fresh water tanks and double bottom tanks.


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE? （）.
    A

    Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleaned

    B

    The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank

    C

    The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue

    D

    Steam cleaning and water washing are both capable of generating electrostatic charges within a tank


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with（）.
    A

    gooseneck vents and flame screens

    B

    pressure-vacuum relief valves

    C

    branch vent lines and a vent header

    D

    forced draft blowers


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? （）
    A

    Each vent for the tank must be equal to the area of the tank filling line

    B

    The tanks must be protected by overflows

    C

    The total area of the vents or the overflow shall be at least equal to the area of the fill line

    D

    There must be twice as much vent area as the area of the fill line


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    Longitudinal and transverse separtions between the tanks,which are used to prevent liquids from leaking from one double bottom tank into the other ,are called（）.
    A

    double bottoms

    B

    cofferdam

    C

    navigating bridge

    D

    superstructure


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.
    A

    only when fully loaded

    B

    if one or more tanks are full

    C

    when transferring cargo

    D

    only when the barge is being towed


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    A vessel is equipped with cross-connected deep tanks.In which situation should the crossconnection valve be closed?（）.
    A

    The tank lie above the waterline and are filled

    B

    The tank are partically filled with dry cargo

    C

    The tanks are partially filled with liquid cargo

    D

    The tanks are filled and lie below the waterline


    正确答案： D
    解析： 暂无解析

  • 第13题：

    A loaded hopper barge with independent tanks has a placard，with alternating red and white quadrants，on each side and end．Which statement concerning this barge is TRUE ________．

    A.The cargo will spontaneously ignite if released to the atmosphere

    B.You must operate this barge as a lead barge

    C.The barge should be spotted as far away from the towboat as possible

    D.The barge must be in a protected position within the tow


    正确答案：D

  • 第14题：

    Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with ______．

    A.Gooseneck vents and flame screens

    B.Pressure-vacuum relief valves

    C.Branch vent lines and a vent header

    D.Forced draft blowers


    正确答案：A

  • 第15题：

    You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．

    A.There must be two portable toxic vapor detectors on board

    B.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volume

    C.Cargo temperature may be taken by portable thermometers

    D.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them


    正确答案：C

  • 第16题：

    单选题
    In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.
    A

    a service tank

    B

    a collecting tank

    C

    a sump

    D

    a settling tank


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it（）.
    A

    one meter from the tank bottom and one meter below the tank top

    B

    one half the ullage of the tank and one meter below the tank top

    C

    one half the ullage of the tank and one meter above the tank bottom

    D

    at three meter intervals from the tank top to the bottom


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    You are on a cargo vessel carrying toluol in bulk in portable tanks. Which is a requirement for pumping the toluol? （）
    A

    Hose connections to the tank must be made with a minimum of three bolts

    B

    There must be water pressure on the fire main

    C

    You must shut down if another vessel comes alongside

    D

    If transferring at anchor，you must display a red flag by day and a red light at night


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，the atmosphere must be sampled（）.
    A

    one meter from the tank bottom and one meter below the tank top

    B

    one half the ullage of the tank and one meter below the tank top

    C

    one half the ullage of the tank and one meter above the tank bottom

    D

    at three meter intervals from the tank top


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）
    A

    gas freed

    B

    inerted

    C

    filled with water

    D

    all of the above as necessary


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Each drilling unit equipped with helicopter fuel storage tanks must have the tanks installed as far as practicable from the（）.
    A

    landing area and sources of vapor ignition

    B

    main deck

    C

    engine room

    D

    drill floor


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    To avoid excessive pressures in the fuel oil filling system during bunkering, you should （）.
    A

    close the tank filling valves quickly

    B

    top off all tanks at the same time

    C

    rill completely all tanks to less than 95% full

    D

    reduce the loading rate when topping off


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
    A

    Loading

    B

    Discharging

    C

    Crude oil washing

    D

    Steaming tanks


    正确答案： C
    解析： 暂无解析

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