更多"[单选题] The compass error of a magnet"的相关试题:
[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
[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
[单选题] What is an advantage of the magnetic compass aboard vessels ________．
A.Compass error is negligible at or near the earth's magnetic poles
B.It does not have to be checked as often
C.It is reliable due to it's essential simplicity
D.All points on the compass rose are readily visible
[单选题] Which would influence a magnetic compass ________.
A. Electrical wiring
B. Iron pipe
C. Radio
D. All of the above
[单选题] 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
[单选题] My gyro-compass error is ______.
A. east two degree
B. two degrees east
C. two east degrees
D. two-degrees
[单选题] Compass error is equal to the ______.
A. deviation minus variation
B. Variation plus compass course
C. combined variation and deviation
D. difference between true and magnetic heading
[单选题] Variation is a compass error that you ______.
A. can correct by adjusting the compass card
B. can correct by adjusting the compensation magnets
C. can correct by changing the vessel’s heading
D. cannot correct
[单选题] Magnetic heading differs from compass heading by _______.
A. compass error
B. true heading
C. variation
D. deviation
[单选题] The difference between magnetic heading and compass heading is called ______．
A.Variation
B.Deviation
C.Compass error
D.Drift
[单选题] A compass card without north-seeking capability that is used for relative bearings is a（n）______．
A.Bearing circle
B.Pelorus
C.Bearing bar
D.Alidade
[单选题] At the master gyrocompass，the compass card is attached to the ______．
A.Spider element
B.Sensitive element
C.Link arm
D.Pickup transformer
[单选题] Before switching on gyro-compass, you should make sure that the power supply on board is ______.
A. high or low
B. AC or DC
C. strong or weak
D. on or off
[单选题] Magnetic variation changes with a change in ______．
A.the vessel's heading
B.sea conditions
C.seasons
D.the vessel's position
[单选题] 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
[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
[单选题] If the magnetic heading is greater than the compass heading，the deviation is ______.
A. east
B. west
C. north
D. south
[单选题] Variation in a compass is caused by ______．
A.Worn gears in the compass housing
B.Magnetism from the earth's magnetic field
C.Magnetism within the vessel
D.Lack of oil in the compass bearings
[单选题] Magnetic information on a chart may be ______．
A.found in the center（s）of the compass rose（s）
B.indicated by isogonic lines
C.found in a note on the chart
D.all of the above
