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Error may be introduced into a magnetic compass by ______.
A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
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更多 “ Error may be introduced into a magnetic compass by ______.A.making a structural change to the vesselB.a short circuit near the compassC.belt bucklesD.All of the above ” 相关考题
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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
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
考题
Magnetic information on a chart may be ______.A.found in the center(s) of the compass rose(s)B.indicated by isogonic linesC.found in a note on the chartD.All of the above
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The permanent magnetism of a vessel may change in strength due to ______.A.the nature of the cargo being carriedB.changes in headingC.major structural repairD.All of the above
考题
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
Heeling error is defined as the change of deviation for a heel of ______.A.2° while the vessel is on an intercardinal headingB.1° while the vessel is on a compass heading of 000°C.2° and is constant on all headingsD.1° while the vessel is on a compass heading of 180°
考题
Compass error is equal to the ______.A.deviation minus variationB.variation plus compass courseC.combined variation and deviationD.difference between true and magnetic heading
考题
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
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
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
单选题Which statement about the Flinders bar of the magnetic compass is CORRECT().A
It compensates for the error caused by the vertical component of the Earth's magnetic fieldB
It compensates for error caused by the heeling of a vesselC
It compensates for quadrantal deviationD
It is only needed in equatorial waters
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The permanent magnetism of a vessel may change in polarity due to().A
being moored for a long time on one headingB
being struck by lightingC
steaming from the north magnetic hemisphere to the south magnetic hemisphereD
loading a homogenous magnetic cargo such as steel plate,iron bars,etc
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When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass,which action should be taken?()A
The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headingsB
After the new heading is reached,the vessel should steam on that course for at least two minutes before the adjustmentC
During the course change,you should gently tap the compass to remove any error caused by friction on the pivot bearingD
After steadying on the new heading,the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error
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Error may be introduced into a magnetic compass by().A
making a structural change to the vesselB
a short circuit near the compassC
belt bucklesD
All of the above
考题
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
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 permanent magnetism of a vessel may change in strength due to().A
the nature of the cargo being carriedB
changes in headingC
major structural repairD
All of the above
考题
单选题The error in a magnetic compass caused by the vessel’s magnetism is called().A
variationB
deviationC
compass errorD
bearing error
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
考题
单选题When adjusting a magnetic compass for error,a deviation table should be made().A
before correcting for any deviationB
after correcting for variationC
after adjusting the fore-and-aft and athwartships permanent magnetsD
before the quadrantal correctors are placed on the compass
考题
单选题Compass error is equal to the().A
deviation minus variationB
variation plus compass courseC
combined variation and deviationD
difference between true and magnetic heading
考题
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 linesC
found in a note on the chartD
All of the above
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