Permanent magnetism is found in ______.A.hard ironB.soft ironC.vertical iron onlyD.horizontal iron only

题目

Permanent magnetism is found in ______.

A.hard iron

B.soft iron

C.vertical iron only

D.horizontal iron only

相似考题

1.Permanent magnetism is caused by ______.A.operation of electrical equipment and generators on board shipB.the earth's magnetic field affecting the ship's hard iron during constructionC.the horizontal component of the earth's magnetic field acting on the horizontal soft ironD.the vertical component of the earth's magnetic field acting on the vertical soft iron

2.A ship under construction or major repair will acquire permanent magnetism due to ______ while sitting stationary in the earth's magnetic field．A.hammering and jarringB.vibration and poundingC.varying magnetic fieldsD.stable or permanent magnetism of the ship

3.What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude ________．A.Flinders barB.Soft iron spheresC.Fore-and-aft permanent magnets in their traysD.Heeling magnet

4.The permanent magnetism of a vessel may change in strength due to ______.A.the nature of the cargo being carriedB.changes in headingC.major structural repairD.All of the above

更多“Permanent magnetism is found in ______.A.hard ironB.soft ironC.vertical iron onlyD.horizon ”相关问题

  • 第1题：

    The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed ______．

    A.permanent magnetism

    B.subpermanent magnetism

    C.induced magnetism

    D.variable magnetism


    正确答案：B

  • 第2题：

    A single vertical magnet placed underneath the compass in the binnacle is used to compensate for ______．

    A.The horizontal component of the permanent magnetism

    B.Deviation caused by the vessel's inclination from the vertical

    C.Induced magnetism in the horizontal soft iron

    D.Induced magnetism in the vertical soft iron


    正确答案：B

  • 第3题：

    Magnetism which is present only when the material is under the influence of an external field is called ______.

    A.permanent magnetism

    B.induced magnetism

    C.residual magnetism

    D.terrestrial magnetism


    正确答案：B
    表现为仅仅当材料在外部磁场的影响下才有磁性叫做感应磁性。

  • 第4题：

    单选题
    If a ship is proceeding towards the magnetic equator，the uncorrected deviation due to permanent magnetism（）.
    A

    increases

    B

    remains the same

    C

    decreases

    D

    is unimportant and may be neglected


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    This induced magnetism（）the permanent magnetism already present in the ship.
    A

    will add to

    B

    will subtract from

    C

    may add to or subtract from

    D

    will not change


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    The vertical component of the Earth’s magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation? （）
    A

    The Flinders bar

    B

    The heeling magnet

    C

    Quadrantal soft iron spheres

    D

    Bar magnets in the binnacle


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
    A

    Quadrantal spheres

    B

    Heeling magnets

    C

    Athwartships magnets

    D

    Fore-and-aft magnets


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    The quadrantal spheres are used to（）.
    A

    Remove deviation on the intercardinal headings

    B

    Remove deviation on the cardinal compass headings

    C

    Remove heeling error

    D

    Compensate for induced magnetism in vertical soft iron


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    The permanent magnetism of a vessel may change in strength due to（）.
    A

    the nature of the cargo being carried

    B

    changes in heading

    C

    major structural repair

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Permanent magnetism is found in（）.
    A

    hard iron

    B

    soft iron

    C

    vertical iron only

    D

    horizontal iron only


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Induced magnetism is found in（）.
    A

    hard iron

    B

    soft iron

    C

    vertical iron only

    D

    horizontal iron only


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    At the magnetic equator there is no induced magnetism in the vertical soft iron because（）.
    A

    the lines of force cross the equator on a 0°-180°alignment

    B

    the quadrantal error is 0°

    C

    there is no vertical component of the Earth's magnetic field

    D

    the intercardinal headings have less than 1°


    正确答案： A
    解析： 暂无解析

  • 第13题：

    The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval ________．

    A.They are not subject to permanent magnetism; no check is necessary

    B.Semiannually

    C.Annually

    D.Every five years


    正确答案：C

  • 第14题：

    Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism．These correctors are the ______．

    A.Fore-and-aft and athwartships magnets

    B.Dip needle and heeling magnet

    C.Heeling magnet and Flinders bar

    D.Flinders bar and quadrantal spheres


    正确答案：D

  • 第15题：

    Which of the following is not true of British iron and steel industry?（）

    • A、Britain.s steel industry is declining.
    • B、No more new discoveries of iron ore have been found in Britain.
    • C、Supplies of iron ore are now mostly foreign.
    • D、Compared with newer plants in the world,Britain.s steelworks are not efficient.

    正确答案:B

  • 第16题：

    单选题
    What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
    A

    Flinders bar

    B

    Soft iron spheres

    C

    Fore-and-aft permanent magnets in their trays

    D

    Heeling magnet


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    The permanent magnetism of a vessel may change in polarity due to（）.
    A

    being moored for a long time on one heading

    B

    being struck by lighting

    C

    steaming from the north magnetic hemisphere to the south magnetic hemisphere

    D

    loading a homogenous magnetic cargo such as steel plate，iron bars，etc


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    The permanent magnetism of a vessel may change in strength due to（）.
    A

    a collision with another vessel

    B

    being moored on a constant heading for a long period of time

    C

    being struck by lightning

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the（）.
    A

    fore-and-aft and athwartships magnets

    B

    dip needle and heeling magnet

    C

    heeling magnet and Flinders bar

    D

    Flinders bar and quadrantal spheres


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
    A

    They are not subject to permanent magnetism; no check is necessary

    B

    Semiannually

    C

    Annually

    D

    Every five years


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    Permanent magnetism is caused by（）.
    A

    operation of electrical equipment and generators on board ship

    B

    the earth's magnetic field affecting the ship's hard iron during construction

    C

    the horizontal component of the earth's magnetic field acting on the horizontal soft iron

    D

    the vertical component of the earth's magnetic field acting on the vertical soft iron


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
    A

    hammering and jarring

    B

    vibration and pounding

    C

    varying magnetic fields

    D

    stable or permanent magnetism of the ship


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    A single vertical magnet placed underneath the compass in the binnacle is used to compensate for（）.
    A

    the horizontal component of the permanent magnetism

    B

    deviation caused by the vessel's inclination from the vertical

    C

    induced magnetism in the horizontal soft iron

    D

    induced magnetism in the vertical soft iron


    正确答案： B
    解析： 暂无解析

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