How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?A.With gooseneck ventsB.With warning signsC.With flame screensD.With pressure-vacuum relief valves

题目

How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?

A.With gooseneck vents

B.With warning signs

C.With flame screens

D.With pressure-vacuum relief valves

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 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.A bonding cable should be connected for cargo operations aboard a tank vessel as soon as the ______．A.Cargo has been loaded or dischargedB.Cargo hose is connectedC.Cargo pumps are startedD.Vessel is ready to handle cargo

4.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

更多“How should cargo tank hatches be protected when the ullage opening is open and the tank NO ”相关问题

  • 第1题：

    What refers to the depth of a petroleum product in a tank ________．

    A.Innage

    B.Outage

    C.Thievage

    D.Ullage


    正确答案：A

  • 第2题：

    When a tank is to be gas freed after washing，the concentration of hydrocarbon vapour should be reduced by purging the inerted cargo tank with ______．

    A.the oxygen

    B.the gas

    C.the inert gas

    D.the hydrocarbon vapour


    正确答案：C

  • 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：

    When cleaning a tank by the Butterworth process，you should begin to pump out the slops ______．

    A.At the end of the drop schedule

    B.When the process is started

    C.When the process is finished

    D.When the tank is clean


    正确答案：B

  • 第5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6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： A
    解析： 暂无解析

  • 第7题：

    单选题
    The term "load on top" is used on many crude oil carriers, is to provide a method for （）.
    A

    calculating the ullage in the cargo tanks

    B

    loading ballast by gravity

    C

    the loading of new cargo into the slop tank as a procedure to minimize pollution

    D

    calculating the ratio of cargo expansion in a cargo tank


    正确答案： C
    解析： 暂无解析

  • 第8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9题：

    单选题
    A bonding cable should be connected for cargo operations aboards a tank vessel as soon as the（）.
    A

    cargo has been loaded or discharged

    B

    cargo ghose is connected

    C

    cargo pumps are started

    D

    vessel is ready to handle cargo


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Oil product samples should be taken from the（）.
    A

    dock riser

    B

    ship's cargo tanks

    C

    shore tank discharge

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.
    A

    open and individual tank valves open

    B

    open and the individual tank valves closed

    C

    closed and the individual tank valves closed

    D

    closed and the individual tank valves open


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    A rectangular fish tank has a base 2 feet wide and 3 feet long. When the tank is partially filled with water, a solid cube with an edge length of 1 foot is placed in the tank. If no overflow of water from the tank is assumed, by how many inches will the level of the water in the tank rise when the cube becomes completely submerged?
    A

    1/6

    B

    1/2

    C

    2

    D

    3

    E

    4


    正确答案： C
    解析：
    When a solid cube with an edge length of 1 foot is placed in the fish tank, it displaces a volume of water that is equal to the volume of the cube, which is 1×1×1 or 1 cubic foot. If h represents the change in the number of feet in the height of the water in the fish tank, then
    Volume of displaced water = 2×3 ×h = 1
    h = 1/6 foot
    Hence, the number of inches the level of the water in the tank will rise is 1/6 ×12 or 2.

  • 第13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14题：

    When referring to quantity of barite in a P-tank，ullage is the ______．

    A.Distance of the barite surface above the tank bottom

    B.Percentage of barite in the tank

    C.Distance of the barite surface below the tank cover

    D.Total weight of barite in UPC（ullages per centimeter）


    正确答案：C

  • 第15题：

    What is a cofferdam ________．

    A.Tube fitted to an ullage hole

    B.Area the product is loaded into

    C.Void or empty space separating two tanks

    D.Opening in the deck used for cleaning a tank


    正确答案：C

  • 第16题：

    单选题
    0il product samples should be taken from the（）.
    A

    dock riser

    B

    ships cargo tanks

    C

    shore tank discharge

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.
    A

    a subsequent temperature rise will cause the cargo to overflow

    B

    air pockets may cause the cargo to bubble out of the ullage hole

    C

    the increased viscosity of the product requires higher loading pressure which increases the chances of a spill

    D

    the tank valve may be stiff and a spill will occur before the valve can be closed


    正确答案： B
    解析： 暂无解析

  • 第18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19题：

    单选题
    In setting the valves on a steam-smothering system on a tank vessel，the master control valve to cargo tanks should be（）.
    A

    open and individual tank valves open

    B

    open and the individual tank valves closed

    C

    closed and the individual tank valves closed

    D

    closed and the individual tank valves open


    正确答案： D
    解析： 暂无解析

  • 第20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21题：

    单选题
    When fueling has been completed（）.
    A

    the fuel tank fill pipe should be left open to allow vapors to vent from the tank

    B

    the engine should be started immediately to prevent vapor lock in the fuel line

    C

    all hatches should be opened and all compartments should be ventilated

    D

    open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    The sign used to caution persons approaching the gangway of a tank barge during cargo transfer reads（）.
    A

    Warning，Keep Off，Stay Clear

    B

    Danger，Do Not Board

    C

    Warning，No Smoking，No Open Lights，No Visitors

    D

    Dangerous Cargo Being Transferred


    正确答案： A
    解析： 暂无解析

  • 第23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

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