Before welding in a tank that has carried petroleum products，the tank must be certified by ______.A.the Coast GuardB.the ABSC.the shipyard fire departmentD.a certified marine chemist

题目

Before welding in a tank that has carried petroleum products，the tank must be certified by ______.

A.the Coast Guard

B.the ABS

C.the shipyard fire department

D.a certified marine chemist

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.Before welding can be done in a tank that has previously carried petroleum products，a certificate must be obtained from ________ ．A.the customsB.the Register Bureau of shippingC.the shipyard fire departmentD.a certified gas chemist

3.Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from ______.A.the customsB.the Register Bureau of shippingC.the shipyard fire departmentD.a certified gas chemist

4.A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate?A.The tank is safe to enterB.The tank is especially dangerous to enterC.Carbon monoxide(一氧化物) is presentD.Water vapor present when the tank was sealed has oxidized(使氧化)

参考答案和解析
正确答案：D
更多“Before welding in a tank that has carried petroleum products,the tank must be certified by ”相关问题

  • 第1题：

    You are carrying triethylamine，methyl methacrylate and isoprene in your multiple-product tanker. Which of the following statements is true?

    A.Isoprene may be carried in a cargo tank adjacent to either of the other two cargoes

    B.Methyl methacrylate may not be carried in a tank adjacent to a pump room

    C.Methyl methacrylate must usually be heated to maintain its stability

    D.Portable thermometers are not permitted to be used to take the cargo temperature of triethylamine


    正确答案：A

  • 第2题：

    By regulation，cargo tank atmosphere must be inert before and during which operation ________．

    A.Stripping

    B.Loading

    C.Cleaning

    D.All of the above


    正确答案：D

  • 第3题：

    Which statement about entering into a tank which has been sealed for a long time is TRUE ________．

    A.The tank should be tested only once to ensure the oxygen content is at least 14% before entry

    B.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regenerated

    C.The tank need not be tested for oxygen content if it is ventilated for more than 24 hours

    D.If the oxygen content tests at less than 12% you should wear an approved gas mask


    正确答案：B

  • 第4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5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6题：

    单选题
    You are carrying triethylamine，methyl methacrylate and isoprene in your multiple-product tanker. Which of the following statements is true? （）
    A

    Isoprene may be carried in a cargo tank adjacent to either of the other two cargoes

    B

    Methyl methacrylate may not be carried in a tank adjacent to a pump room

    C

    Methyl methacrylate must usually be heated to maintain its stability

    D

    Portable thermometers are not permitted to be used to take the cargo temperature of triethylamine


    正确答案： D
    解析： 暂无解析

  • 第7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8题：

    单选题
    Before a tank is to be crude oil washed，the oxygen content in the tank must be measured at a position（）.
    A

    immediately above the level of the oil

    B

    at the top of the tank

    C

    in the vent riser

    D

    one meter from the deck


    正确答案： D
    解析： 暂无解析

  • 第9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10题：

    单选题
    Which step is NOT generally taken when gas-freeing a tank?（）.
    A

    Washing the tank interior with sea water

    B

    Application of degreasing solvents

    C

    Removal of corrosion products and sludge

    D

    Fresh air ventilation


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）
    A

    The tank is safe to enter

    B

    The tank is especially dangerous to enter

    C

    Carbon monoxide is present

    D

    Water vapor present when the tank was sealed has oxidized


    正确答案： B
    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：

    Which step is NOT generally taken when gas-freeing a tank? ______.

    A.Washing the tank interior with sea water

    B.Application of degreasing solvents

    C.Removal of corrosion products and sludge

    D.Fresh air ventilation


    正确答案：B

  • 第14题：

    What is NOT a requirement for the preparation of used，gasoline-propelled cars if they are to be carried as ordinary cargo and not as hazardous cargo ________．

    A.The engine must be run until it dies from lack of fuel

    B.The fuel tank must be inerted with CO2

    C.The ignition key may not be in the ignition

    D.The vehicle must be inspected for fuel leaks


    正确答案：B

  • 第15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16题：

    You are planning to use a crude oil washing system．What precaution must be taken with the tank as the source for the washing machines ________．

    A.It must be debottomed and the level lowered by at least one meter

    B.The oil in the source tank must be sampled for compatibility

    C.The source tank must have been crude oil washed at least once in the past 150 days

    D.The inert gas system must lower the oxygen content to a maximum of 12% oxygen in the tank


    正确答案：A

  • 第17题：

    单选题
    Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.
    A

    open the bypass line

    B

    cut in the lube oil cooler

    C

    pressurize the lube oil system

    D

    top off the expansion tank


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Before welding is permitted on a fuel tank, it must be certified or declared （）
    A

    safe for becoming rounded

    B

    safe for hot work

    C

    not safe for personnel

    D

    not safe for hot work


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    A tank which has been sealed for a long period of time can be dangerous because （）.
    A

    steel surfaces consume oxygen by rusting

    B

    sealed tanks usually form a vacuum

    C

    moisture condenses in the tank, displacing the oxygen

    D

    most tank coatings give off poisonous vapors in the presence of moisture


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    By regulation，cargo tank atmosphere must be inert before and during which operation?（）
    A

    Stripping

    B

    Loading

    C

    Cleaning

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第21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22题：

    单选题
    Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.
    A

    Orsat apparatus

    B

    flame safety lamp

    C

    Halide torch

    D

    combustible gas indicator


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    You are on a containership carrying a tank container that had been filled with sodium hydroxide solution. The container is empty but has not been cleaned. Which，if any，placard is required?（）.
    A

    No placard is required; the tank openings must be sealed

    B

    Empty placard with corrosive placard

    C

    Residue label with the UN number

    D

    Black and white corrosive placard


    正确答案： C
    解析： 暂无解析

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