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单选题
Magnetic compass deviation（）.
A
varies depending upon the bearing used
B
is the angular difference between magnetic north and compass north
C
is published on the compass rose on most nautical charts
D
is the angular difference between geographic and magnetic meridians
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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
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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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When an azimuth of the Sun has been taken and the deviation of the standard magnetic compass computed，the watch officer should record the results ______.A.in the vessel's Official LogbookB.on the compass deviation cardC.in the compass deviation logD.on a Napier diagram
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Compass deviation is caused by ______.A.magnetism from the earth’s magnetic fieldB.misalignment of the compassC.magnetism within the vesselD.a dirty compass housing
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Compass error is equal to the ______.A.deviation minus variationB.variation plus compass courseC.combined variation and deviationD.difference between true and magnetic heading
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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
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Deviation in a compass is caused by the ______.A.vessel’s geographic positionB.vessel’s headingC.earth’s magnetic fieldD.influence of the magnetic materials of the vessel
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If the compass heading and magnetic-heading are the same then ______.A.the deviation has been offset by the variationB.there is something wrong with the compassC.the compass is being influenced by nearby metalsD.there is no deviation on that heading
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
单选题Compass deviation is caused by（）.A
magnetism from the earth's magnetic fieldB
misalignment of the compassC
magnetism within the vesselD
a dirty compass housing
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Deviation in a compass is caused by the（）.A
vessel's geographic positionB
vessel's headingC
earth's magnetic fieldD
influence of the magnetic materials of the vessel
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 compass deviation changes as the vessel changes（）.A
geographical positionB
speedC
headingD
longitude
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If the magnetic heading is greater than the compass heading，the deviation is（）.A
eastB
westC
northD
south
考题
单选题If the compass heading and the magnetic heading are the same then（）.A
the deviation has been offset by the variationB
there is something wrong with the compassC
the compass is being influenced by nearby metalsD
there is no deviation on that heading
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
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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（）.A
divisional partsB
coefficientsC
fractional partsD
equations
考题
单选题The quadrantal spheres are used to（）.A
Remove deviation on the intercardinal headingsB
Remove deviation on the cardinal compass headingsC
Remove heeling errorD
Compensate for induced magnetism in vertical soft iron
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Deviation which is maximum on intercardinal compass headings may be removed by the（）.A
Flinders barB
transverse magnetsC
fore-and-aft magnetsD
soft iron spheres on the sides of the compass
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
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