The permanent magnetism of a vessel may change in polarity due to().
相似题目
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The line which connects the points of zero magnetic dip is().
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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? ()
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Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the().
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What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?()
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Magnetic dip is a measurement of the angle between the().
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The compass error of a magnetic compass that has no deviation is().
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The coil of wire rotating in the magnetic field produces the().
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What is the primary disadvantage of a permanent chain chaser system?()
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Permanent magnetism is caused by().
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Nearly()of the land in Canada has no permanent population.
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If a ship is proceeding towards the magnetic equator,the uncorrected deviation due to permanent magnetism().
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This induced magnetism()the permanent magnetism already present in the ship.
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A ship under construction or major repair will acquire permanent magnetism due to()while sitting stationary in the earth’s magnetic field.
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The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is().
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The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval().
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Magnets in the binnacles of magnetic compasses are used to reduce the effect of().
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By convention,the north seeking ends of a compass’ magnets are colored().
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The vertical angle between the horizontal and the magnetic line of force is the().
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What is the basic principle of the magnetic compass?()
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Which statement about the Flinders bar of the magnetic compass is CORRECT().
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35. The principal purpose of adjustment of the magnetic compass is to eliminate _____ as far as possible.
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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 _____.
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In Sonnet 18, Shakespeare shows a faith in the permanence of poetry.
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The cause of the transition of the Earth's magnetic field comes from ___.
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