网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
Permanent magnetism is caused by ______.
A.operation of electrical equipment and generators on board ship
B.the earth's magnetic field affecting the ship's hard iron during construction
C.the horizontal component of the earth's magnetic field acting on the horizontal soft iron
D.the vertical component of the earth's magnetic field acting on the vertical soft iron
参考答案
更多 “ Permanent magnetism is caused by ______.A.operation of electrical equipment and generators on board shipB.the earth's magnetic field affecting the ship's hard iron during constructionC.the horizontal component of the earth's magnetic field acting on the horizontal soft ironD.the vertical component of the earth's magnetic field acting on the vertical soft iron ” 相关考题
考题
Permanent magnetism is found in ______.A.hard ironB.soft ironC.vertical iron onlyD.horizontal iron only
考题
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
A ship under construction or major repair will acquire permanent magnetism due to ______ while sitting stationary in the earth's magnetic field．A.hammering and jarringB.vibration and poundingC.varying magnetic fieldsD.stable or permanent magnetism of the ship
考题
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude ________．A.Flinders barB.Soft iron spheresC.Fore-and-aft permanent magnets in their traysD.Heeling magnet
考题
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed ______．A.permanent magnetismB.subpermanent magnetismC.induced magnetismD.variable magnetism
考题
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval ________．A.They are not subject to permanent magnetism; no check is necessaryB.SemiannuallyC.AnnuallyD.Every five years
考题
A single vertical magnet placed underneath the compass in the binnacle is used to compensate for ______．A.The horizontal component of the permanent magnetismB.Deviation caused by the vessel's inclination from the verticalC.Induced magnetism in the horizontal soft ironD.Induced magnetism in the vertical soft iron
考题
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
Magnetism which is present only when the material is under the influence of an external field is called ______.A.permanent magnetismB.induced magnetismC.residual magnetismD.terrestrial magnetism
考题
单选题If a ship is proceeding towards the magnetic equator，the uncorrected deviation due to permanent magnetism（）.A
increasesB
remains the sameC
decreasesD
is unimportant and may be neglected
考题
单选题What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.A
Flinders barB
Soft iron spheresC
Fore-and-aft permanent magnets in their traysD
Heeling magnet
考题
单选题（）on board ship are used to control and distribute the electrical energy generated by generators.A
GovernorsB
AlternatorsC
BlackboardsD
Switchboards
考题
单选题When a rescuer finds an electrical burn victim in the vicinity of live electrical equipment or wiring，his first step is to（）.A
flush water over any burned area of the patientB
apply ointment to the burned areas on the patientC
get assistance to shut down electrical power in the areaD
remove the patient from the vicinity of the live electrical equipment or wiring
考题
单选题This induced magnetism（）the permanent magnetism already present in the ship.A
will add toB
will subtract fromC
may add to or subtract fromD
will not change
考题
单选题Electrical failures in motors are caused by the breakdown of insulation, which may be caused by （）A
penetration of moistureB
accumulation of dirtC
overheatingD
All of the above
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Steering gears can be arranged with hydraulic control equipment known as a （）, or with electrical control equipment.A
telemeterB
telemanometerC
telemotorD
telemometer
考题
单选题The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.A
They are not subject to permanent magnetism; no check is necessaryB
SemiannuallyC
AnnuallyD
Every five years
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Permanent magnetism is caused by（）.A
operation of electrical equipment and generators on board shipB
the earth's magnetic field affecting the ship's hard iron during constructionC
the horizontal component of the earth's magnetic field acting on the horizontal soft ironD
the vertical component of the earth's magnetic field acting on the vertical soft iron
考题
单选题Permanent magnetism is found in（）.A
hard ironB
soft ironC
vertical iron onlyD
horizontal iron only
考题
单选题A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.A
hammering and jarringB
vibration and poundingC
varying magnetic fieldsD
stable or permanent magnetism of the ship
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A single vertical magnet placed underneath the compass in the binnacle is used to compensate for（）.A
the horizontal component of the permanent magnetismB
deviation caused by the vessel's inclination from the verticalC
induced magnetism in the horizontal soft ironD
induced magnetism in the vertical soft iron
考题
单选题Magnets are placed in horizontal trays in the compass binnacle to compensate for the（）.A
induced magnetism in the vessel's horizontal soft ironB
change in the magnetic field when the vessel inclines from verticalC
permanent magnetism of the vesselD
magnetic fields caused by electrical currents in the vicinity
热门标签
最新试卷