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

相似题目

• The line which connects the points of zero magnetic dip is（）.

  A . An agonic line B . The magnetic equator C . A magnetic meridian D . All of the above

  查看最佳答案

• 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

  查看最佳答案

• A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）.

  A . water B . babbitt C . iron or steel D . acid

  查看最佳答案

• Magnetic dip is a measurement of the angle between the（）.

  A . geographic pole and the magnetic pole B . lubber's line and true north C . horizontal and the magnetic line of force D . compass heading and the magnetic heading

  查看最佳答案

• If the compass heading and the magnetic heading are the same then（）.

  A . the deviation has been offset by the variation B . there is something wrong with the compass C . the compass is being influenced by nearby metals D . there is no deviation on that heading

  查看最佳答案

• The coil of wire rotating in the magnetic field produces the（）.

  A . voltage B . current C . power D . frequency

  查看最佳答案

• 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

  查看最佳答案

• 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 iro

  查看最佳答案

• When crossing the magnetic equator the（）.

  A . Flinders bar should be inverted B . Heeling magnet should be inverted C . The quadrantal spheres should be rotated 180° D . Flinders bar should be moved to the opposite side of the binnacle

  查看最佳答案

• The standard magnetic compass heading differs from the true heading by（）.

  A . compass error B . latitude C . variation D . deviatio

  查看最佳答案

• 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

  查看最佳答案

• 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

  查看最佳答案

• 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 shi

  查看最佳答案

• Magnets in the binnacles of magnetic compasses are used to reduce the effect of（）.

  A . deviation B . variation C . local attraction D . All of the above

  查看最佳答案

• The points on the earth’s surface where the magnetic dip is 90° are（）.

  A . Along the magnetic equator B . Connected by the isoclinal line C . The isopors D . The magnetic pole

  查看最佳答案

• The vertical angle between the horizontal and the magnetic line of force is the（）.

  A . elevation B . magnetic angle C . vertical angle D . di

  查看最佳答案

• 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&deg

  查看最佳答案

• What is the basic principle of the magnetic compass?（）

  A . Magnetic materials of the same polarity repel each other and those of opposite polarity attract B . The Earth's magnetic lines of force are parallel to the surface of the Earth C . Magnetic meridians connect points of equal magnetic variation D . The compass needle(s) will，when properly compensated，lie parallel to the isogonic lines of the Earth

  查看最佳答案

• Which statement about the Flinders bar of the magnetic compass is CORRECT（）.

  A . It compensates for the error caused by the vertical component of the Earth's magnetic field B . It compensates for error caused by the heeling of a vessel C . It compensates for quadrantal deviation D . It is only needed in equatorial water

  查看最佳答案

• 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

  查看最佳答案

• 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

  查看最佳答案

• You are about to go to sea and adjust the magnetic compass．To expedite the adjustment at sea，in what order should the following dockside adjustments be made（）.

  A . Flinders bar first，then the heeling magnet and spheres B . Heeling magnet first，then the Flinders bar and spheres C . Flinders bar first，then the spheres and heeling magnet D . Spheres first，then the Flinders bar and heeling magnet

  查看最佳答案

• 90. The angular difference between the true meridian (great circle connecting the geographic poles) and the magnetic meridian (direction of the lines of magnetic flux) is called _____.

  查看最佳答案

• The cause of the transition of the Earth's magnetic field comes from ___.

  A．the movement deep inside the Earth B．the periodically reverses of the Earth C．the force coming from outer space D．the mechanical movement of the Earth 此题为多项选择题。

  查看最佳答案