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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
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更多 “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 polesB It does not have to be checked as oftenC It is reliable due to it's essential simplicityD All points on the compass rose are readily visible” 相关考题
考题
The advantage(s) of using wire rope lashing on vehicles aboard Ro-Ro vessels is that it__.A.is lighter than chainB.has a good working lifeC.is not affected by temperatureD.All of the above
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Which one of the followings is incorrect about magnetic compass?______.A.The magentic compass is compulsory on my vesselB.The magentic compass is prone to errorC.The magentic compass is always placed inside steel constructionsD.The magentic compass needs to be calibrated to compensate for local magnetic distortion
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A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?A.Move the quadrantal spheres closer to the compassB.Raise the heeling magnet if the red end is upC.Remove some of the Flinders barD.Raise or lower the athwartship magnets
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What is used when securing heavy vehicles aboard Ro-Ro vessels ________．A.Buckle or ratchet tensionerB.WebbingC.Manila ropeD.None of these
考题
What may NOT be used when securing heavy vehicles aboard Ro-Ro vessels ________．A.Chain leverB.TurnbuckleC.WebbingD.Chain
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Deviation is the angle between the ______.A.true meridian and the axis of the compass cardB.true meridian and the magnetic meridianC.magnetic meridian and the axis of the compass cardD.axis of the compass card and the degaussing meridian
考题
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 equalB.Compass north will be true northC.Variation will equal deviationD.There will be no compass error
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Magnetic compass deviation______．A.varies depending upon the bearing usedB.is the angular difference between magnetic north and compass northC.is published on the compass rose on most nautical chartsD.is the angular difference between geographic and magnetic meridians
考题
Magnetic heading differs from compass heading by______．A.compass errorB.true headingC.variationD.Deviation
考题
Magnetic dip is a measurement of the angle between the ______.A.geographic pole and the magnetic poleB.lubber’s line and true northC.horizontal and the magnetic line of forceD.compass heading and the magnetic heading
考题
单选题The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.A
north magnetic poleB
south magnetic poleC
magnetic prime vertical meridianD
magnetic equator
考题
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 equalB
Compass north will be true northC
Variation will equal deviationD
There will be no compass error
考题
单选题Deviation is the angle between the（）.A
true meridian and the axis of the compass cardB
true meridian and the magnetic meridianC
magnetic meridian and the axis of the compass cardD
axis of the compass card and the degaussing meridian
考题
单选题The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is（）.A
deviationB
variationC
compass errorD
dip
考题
单选题Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.A
Heeling magnetB
Flinders barC
Fore-and-aft magnetsD
All of the above can be set on magnetic east or magnetic west headings
考题
单选题A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment? （）A
If the quadrantal spheres are all the way out，replace them with smaller spheresB
If the quadrantal spheres are all the way in，replace them with larger spheresC
If the quadrantal spheres are all of the way out，move the spheres inD
If the quadrantal spheres are all the way out，replace them with larger spheres.
考题
单选题A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment? （）A
Move the quadrantal spheres closer to the compassB
Raise the heeling magnet if the red end is upC
Remove some of the Flinders barD
Raise or lower the athwartship magnets
考题
单选题A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment? （）A
If the quadrantal spheres are out as far as possible replace them with smaller spheresB
If the quadrantal spheres are in as far as possible remove one of the spheresC
If the quadrantal spheres are in as far as possible replace them with smaller spheresD
If the quadrantal spheres are out as far as possible，move the quadrantal spheres in
考题
单选题The greatest directive force is exerted on the magnetic compass when the（）.A
needles are nearly in line with the meridianB
vessel is near the magnetic polesC
variation is near zeroD
vessel is near the magnetic equator
考题
单选题What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）A
Quadrantal spheresB
Heeling magnetsC
Athwartships magnetsD
Fore-and-aft magnets
考题
单选题Variation in a compass is caused by（）.A
worn gears in the compass housingB
magnetism from the earth's magnetic fieldC
magnetism within the vesselD
lack of oil in the compass bearings
考题
单选题The principal purpose of magnetic compass adjustment is to（）.A
reduce the variation as much as possibleB
reduce the deviation as much as possibleC
reduce the magnetic dip as much as possibleD
allow the compass bowl to swing freely on its gimbals
考题
单选题An advantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it（）.A
has long lifeB
is light weightC
absorbs shockD
has fine adjustment
考题
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 attractB
The Earth's magnetic lines of force are parallel to the surface of the EarthC
Magnetic meridians connect points of equal magnetic variationD
The compass needle（s）will，when properly compensated，lie parallel to the isogonic lines of the Earth
考题
单选题The magnetic compass operates on the principle that（）.A
like magnetic poles attractB
unlike magnetic poles repelC
unlike poles attractD
the poles of the compass line up with the geographic poles of the earth
考题
单选题The compass error of a magnetic compass that has no deviation is（）.A
zeroB
equal to variationC
eliminated by adjusting the compassD
constant at any geographical location
考题
单选题Magnetic compass deviation（）.A
varies depending upon the bearing usedB
is the angular difference between magnetic north and compass northC
is published on the compass rose on most nautical chartsD
is the angular difference between geographic and magnetic meridians
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