Magnetism which is present only when the material is under the influence of an external field is called ______.A.permanent magnetismB.induced magnetismC.residual magnetismD.terrestrial magnetism

题目

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

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.Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called ______．A.fluxB.polesC.magnetsD.azimuth

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

更多“Magnetism which is present only when the material is under the influence of an external field is called ______.A.permanent magnetismB.induced magnetismC.residual magnetismD.terrestrial magnetism”相关问题

  • 第1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：C

  • 第2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3题：

    Compass deviation is caused by ______.

    A.magnetism from the earth’s magnetic field

    B.misalignment of the compass

    C.magnetism within the vessel

    D.a dirty compass housing


    正确答案：C
    罗经自差由船舶内部的磁力导致。

  • 第4题：

    Under which two circumstances would an RSTP bridge flush its CAM table？（）

    • A、upon a port state change
    • B、upon receiving a topology change notification
    • C、when transitioning from discarding to forwarding
    • D、when transitioning from forwarding to discarding
    • E、only when changing from listening to discarding
    • F、when CAM resources have been completely used up

    正确答案:B,C

  • 第5题：

    jim has created a field hint for the address field. Users tell him this text disappears when they click in the address field. which one of the following is most likely reason?（）

    • A、 the address field is computed 
    • B、 jim should have used a text popup       
    • C、 jim stored the field hint in the database    
    • D、 field hint only display when the user has not clicked in the field （field hint）

    正确答案:D

  • 第6题：

    单选题
    jim has created a field hint for the address field. Users tell him this text disappears when they click in the address field. which one of the following is most likely reason?（）
    A

     the address field is computed 

    B

     jim should have used a text popup       

    C

     jim stored the field hint in the database    

    D

     field hint only display when the user has not clicked in the field （field hint）


    正确答案： A
    解析： 暂无解析

  • 第7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： A
    解析： 暂无解析

  • 第8题：

    单选题
    The internal force of a material, which tends to resist deformation when subjected to external forces, is known as （）.
    A

    stress

    B

    strain

    C

    shear strength

    D

    ultimate tensile strength


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    The Flinders bar on a magnetic compass compensates for the（）.
    A

    Induced magnetism in vertical soft iron

    B

    Induced magnetism in horizontal soft iron

    C

    Permanent magnetism in ship's steel

    D

    Vessel's inclination from the vertical


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    All items such as steam pipes, exhaust pipes and fittings which, because of their location and operating temperature, present a hazard should be adequately lagged.That means the items should（）
    A

    not be put into operation too early

    B

    be pay adequate attention to

    C

    be used only when necessary

    D

    be coated with certain material


    正确答案： D
    解析： 暂无解析

  • 第11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： D
    解析： 暂无解析

  • 第12题：

    单选题
    Magnets are placed in horizontal trays in the compass binnacle to compensate for the（）.
    A

    induced magnetism in the vessel's horizontal soft iron

    B

    change in the magnetic field when the vessel inclines from vertical

    C

    permanent magnetism of the vessel

    D

    magnetic fields caused by electrical currents in the vicinity


    正确答案： D
    解析： 暂无解析

  • 第13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14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15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：C
    假如船舶正朝着磁赤道航行，未经修正的自差由于永久磁性影响而减少。

  • 第16题：

    Which of the following devices can route electrical signals only when activated by an external control signal？（）

    • A、Solenoid
    • B、Relay
    • C、Clutch
    • D、Capacitor

    正确答案:B

  • 第17题：

    单选题
    Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
    A

    flux

    B

    poles

    C

    magnets

    D

    azimuth


    正确答案： D
    解析： 暂无解析

  • 第18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19题：

    单选题
    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： A
    解析： 暂无解析

  • 第20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 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： C
    解析： 暂无解析

  • 第23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

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