If a magnetic compass is not affected by any magnetic field other than the Earth’s which statement is TRUE?______.
A.Compass error and variation are equal
B.Compass north will be true north
C.Variation will equal deviation
D.There will be no compass error
第1题:
Which magnetic compass corrector(s)CANNOT be set on a heading of magnetic east or magnetic west ________.
A.Heeling magnet
B.Flinders bar
C.Fore-and-aft magnets
D.All of the above can be set on magnetic east or magnetic west headings
第2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
第3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
第4题:
对
错
第5题:
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
第6题:
Which magnetic compass corrector(s)can be set while the vessel is on a heading of magnetic north or magnetic south ________.
A.Quadrantal spheres
B.Heeling magnets
C.Flinders bar
D.Fore-and-aft magnets
第7题:
Deviation in a compass is caused by the ______.
A.vessel’s geographic position
B.vessel’s heading
C.earth’s magnetic field
D.influence of the magnetic materials of the vessel
第8题:
The direction of prevailing winds in the Northern hemisphere is caused by the ______.
A.Magnetic field at the North Pole
B.Gulf Stream
C.Earth's rotation
D.Arctic cold fronts
第9题:
第10题:
magnetism from the earth's magnetic field
misalignment of the compass
magnetism within the vessel
a dirty compass housing