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 h

题目

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

相似考题

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

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 caused by ______.A.operation of electrical equipment and generators ”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
    （）on board ship are used to control and distribute the electrical energy generated by generators.
    A

    Governors

    B

    Alternators

    C

    Blackboards

    D

    Switchboards


    正确答案： D
    解析： 暂无解析

  • 第6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：

    名词解释题
    电气设备（electrical equipment）

    正确答案： 用于发电、变电、输电、配电、用电的设备。例如旋转电机、变压器、防护电器、测量仪表、开关电器、敷线设备、用电器具等。
    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
    The error in a magnetic compass caused by the vessel’s magnetism is called（）.
    A

    variation

    B

    deviation

    C

    compass error

    D

    bearing error


    正确答案： B
    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 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：

    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15题：

    电气设备（electrical equipment）


    正确答案: 用于发电、变电、输电、配电、用电的设备。例如旋转电机、变压器、防护电器、测量仪表、开关电器、敷线设备、用电器具等。

  • 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
    When a rescuer finds an electrical burn victim in the vicinity of live electrical equipment or wiring，his first step is to（）.
    A

    flush water over any burned area of the patient

    B

    apply ointment to the burned areas on the patient

    C

    get assistance to shut down electrical power in the area

    D

    remove the patient from the vicinity of the live electrical equipment or wiring


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    Electrical failures in motors are caused by the breakdown of insulation, which may be caused by （）
    A

    penetration of moisture

    B

    accumulation of dirt

    C

    overheating

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    Steering gears can be arranged with hydraulic control equipment known as a （）, or with electrical control equipment.
    A

    telemeter

    B

    telemanometer

    C

    telemotor

    D

    telemometer


    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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