301) The line which connects the points of zero magnetic dip is __________. the magnetic equator
302) The magnetic compass error which changes with the geographical location of your vessel is called __________. variation
303) The principal purpose of magnetic compass adjustment is to __________. reduce the deviation as much as possible
304) The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________. coefficients
305) What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism? Heeling magnets
306) Which information does the outer ring of a compass rose on a nautical chart provide? True directions
307) You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356°. Which action should be taken? Use the athwartships magnets and adjust the compass until it reads 358°.
308) You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 276°. What action should be taken? Adjust the compass with the fore-and-aft magnets until the compass reads 273°.
309) The line connecting the points of the earth's surface where there is no dip is the __________. magnetic equator
310) The lubber's line of a magnetic compass __________. indicates the vessel's heading
311) The lubber's line on a magnetic compass indicates __________. the direction of the vessel's head
312) The permanent magnetism of a vessel may change in polarity due to __________. being struck by lighting
313) To find a magnetic compass course from a true course you must apply __________. deviation and variation
314) True heading differs from magnetic heading by __________. variation
315) When a vessel changes course from one cardinal heading to another cardinal heading while adjusting the compass, which action should be taken? After the new heading is reached, the vessel should steam on that course for at least two minutes before the adjustment.
316) Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic north or magnetic south? Heeling magnets
317) The chart indicates variation was 3 deg. 45' E in 1993, the annual change is increasing 6'. If you use the chart in 2003, how much variation should you apply? 4 deg. 45' E
318) Methods of inducing magnetism in an iron bar for making magnets, include the following EXCEPT _____________. The method of divided touch
319) These are physical facts about the Earth's magnetic fields/Poles. EXCEPT ________ The two poles are not diametrically opposite to each other
320) It is a semi-circular deviation which is proportional to the same of the compass has the coefficient B
321) Deviation cannot be totally eliminated but can be reduced to a minimum. The deviation value is called residual deviation
322) The theory of magnetism which thought that the atoms within the molecules are themselves poles or having two magnetic poles, and from themselves into an irregular closed circuits of group domain theory
323) The theory on magnetism which thought that the atoms within the molecules are themselves dipoles, or having two magnetic poles, and form themselves into an irregular closed circuits or group _____ domain theory
324) The soft iron spheres used for compensating against the effect of horizontal soft iron in the ship quadrantal corrector
325) Which magnetic compass corrector(s) can be set while the vessel is on a heading magnetic North or Magnetic South heeling magnets
326) The direction of the meridian through the observer towards the geographic pole is __________? true north
327) Magnetic compass deviation _____________? is the angular difference between magnetic north and compass north
328) Every "field of the magnet" contains something which is called magnetic flux
329) Every field of magnet contains something which is called____ magnetic flux
330) It is alternatively defines as the line joining places where there is no dip, and for this season it is sometimes called ACLINIC LINE magnetic equator
331) It is a valuable reference in navigation, for it provides the directive force for the magnetic compass horizontal component
332) Since all red poles of magnets are attracted toward the Earth's North, it follows from the law of attraction and repulsion, that the Earth's North Pole is Blue
333) Since all red poles of magnets are attracted toward the earth's north, it follows from the law of attraction and repulsion, that the earth north pole is____ blue
334) The angle of which a freely suspended magnet makes with horizontal or the angle between the direction of the Earth's field at any place and the horizontal is called angle of dip
335) The angle of which a freely suspended magnet makes with the horizontal, or the angle between the direction of the earth's field at any place and the horizontal is called____ angle of dip
336) Deviation is the horizontal angle at any place between the directions of _________? the magnetic north and the compass north
337) Lines on the magnetic chart where the true meridian and magnetic meridian coincide thus having a zero variation is referred to as. agonic lines
338) Reducing the strength of a magnetic field decreases the number of cause in that field of the process is called degaussing
339) Basic principles of a magnet is, like poles repel and unlike poles attract, the force between magnetic poles being inversely proportional to the square of their distance apart
340) When crossing the magnetic equator the __________. heeling magnet should be inverted
341) As a vessel changes course to starboard, the compass card in a magnetic compass __________. remains aligned with compass north
342) At the magnetic equator there is no induced magnetism in the vertical soft iron because __________. there is no vertical component of the Earth's magnetic field
343) By convention, the Earth's north magnetic pole is colored __________. blue
344) By convention, the north seeking ends of a compass' magnets are colored __________. red
345) How is variation indicated on a small-scale nautical chart? Isogonic lines
346) If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism __________. decreases
347) Magnetic dip is a measurement of the angle between the __________. horizontal and the magnetic line of force
348) Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________. permanent magnetism of the vessel
349) The compass deviation changes as the vessel changes __________. heading
350) The magnetic compass operates on the principle that __________. unlike poles attract
Tuesday, 15 November 2016
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