单选题The greatest directive force is exerted on the magnetic compass when the（）.Aneedles are nearly in line with the meridianBvessel is near the magnetic polesCvariation is near zeroDvessel is near the magnetic equator
单选题
The greatest directive force is exerted on the magnetic compass when the（）.
A
needles are nearly in line with the meridian
B
vessel is near the magnetic poles
C
variation is near zero
D
vessel is near the magnetic equator
参考解析
解析：
暂无解析
相关考题：
The weight of something is another way of describing the amount of force exerted on () by gravity. A.itB.themC.thatD.one
In Trial 9, the electrical force exerted by Sphere Y on Sphere X and the electrical force exerted by Sphere X on Sphere Y were exerted in which direction(s)?A.east； eastB.east； westC.west； westD.west； east
The force exerted by a propeller which tends to throw the stern right or left is called ______.A.slipB.sidewise forceC.rotational forceD.thrust
Reid vapor pressure is ______．A.exerted by liquid cargo on the sides of a tankB.exerted by liquid cargo on a cargo hose bodyC.the lowest temperature and pressure that will cause a flammable liquid to give off vaporsD.a measurement of the amount of flammable vapors given off by a liquid at a certain temperature
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
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
下列（）是news服务的URL的正确范例。A、news：comp.infosystems.www.miscB、news：//comp.infosystems.www.miscC、//comp.infosystems.www.miscD、comp.infosystems.www.misc
ejb环境变量如何调用名为ejbC的ejb （）A、 initCtx.lookup（"java：comp/env/ejb/ejbC"）B、 initCtx.lookup（"java：comp/ejb/ejbC"）C、 initCtx.lookup（"java：comp/ejbC"）D、 initCtx.lookup（"java：comp/env/ejbC"）
单选题Deviation is caused by（）.Achanges in the earth's magnetic fieldBnearby magnetic land masses or mineral depositsCmagnetic influence inherent to that particular vesselDthe magnetic lines of force not coinciding with the lines of longitude
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（）.Anorth magnetic poleBsouth magnetic poleCmagnetic prime vertical meridianDmagnetic equator
单选题English people _____.Ahave never discussed who is the world’s greatest poet and greatest dramatistBnever discuss the world’s greatest poets and dramatistCare sure who is the world’s greatest poet and greatest dramatistDdo not care who is the world’s greatest poet and greatest dramatist
单选题The force exerted by a propeller which tends to throw the stern right or left is called（）.AslipBsidewise forceCrotational forceDthrust
单选题Papermaking is _____ of ancient China.Aone of greatest inventorBone of the greatest inventorsCone of greatest inventionDone of the greatest inventions
单选题The greatest English realist of the mid and late 19th century was _____. With great force and truthfulness, he/she pictures bourgeois civilization, showing the miserary and sufferings of the common people.AEmily BronteBGeorge EliotCCharles DickensDElizabeth Gaskell
单选题Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.AHeeling magnetBFlinders barCFore-and-aft magnetsDAll of the above can be set on magnetic east or magnetic west headings
单选题The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when（）.Adecelerating when lowering the loadBdecelerating when raising the loadClowering the load at constant speedDraising the load at constant speed
单选题Magnetic dip is a measurement of the angle between the（）.Ageographic pole and the magnetic poleBlubber's line and true northChorizontal and the magnetic line of forceDcompass heading and the magnetic heading
单选题ejb环境变量如何调用名为ejbC的ejb （）A initCtx.lookup（java：comp/env/ejb/ejbC）B initCtx.lookup（java：comp/ejb/ejbC）C initCtx.lookup（java：comp/ejbC）D initCtx.lookup（java：comp/env/ejbC）
单选题What is the basic principle of the magnetic compass（）.AMagnetic materials of the same polarity repel each other and those of opposite polarity attractBThe Earth's magnetic lines of force are parallel to the surface of the EarthCMagnetic meridians connect points of equal magnetic variationDThe compass needle（s）will，when properly compensated，lie parallel to the isogonic lines of the Earth
单选题The principal purpose of adjustment of the magnetic compass is to eliminate（）as far as possible.AvariationBcompass errorCdeviationDearth's magnetic force
单选题The line which connects the points of zero magnetic dip is（）.AAn agonic lineBThe magnetic equatorCA magnetic meridianDAll of the above
单选题The directive force of a gyrocompass（）.Aincreases with latitude，being maximum at the geographic polesBdecreases with latitude，being maximum at the geographic equatorCis greatest when a vessel is near the Earth's magnetic equatorDremains the same at all latitudes
单选题The vertical angle between the horizontal and the magnetic line of force is the（）.AelevationBmagnetic angleCvertical angleDdip
单选题At the magnetic equator there is no induced magnetism in the vertical soft iron because（）.Athe lines of force cross the equator on a 0°-180°alignmentBthe quadrantal error is 0°Cthere is no vertical component of the Earth's magnetic fieldDthe intercardinal headings have less than 1°
单选题The transition of the Earth’s magnetic field is possibly caused by _____.Athe flows of melted iron inside the EarthBthe periodical movement of the EarthCthe mechanical energy of the solar systemDthe force coming from outer space