海船船员考试
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
题目
Flinders bar
Soft iron spheres
Fore-and-aft permanent magnets in their trays
Heeling magnet
参考答案和解析
相似问题和答案
第1题：
A.255.255.255.0
B.255.255.255.192
C.255.255.255.250
D.255.255.255.252
第2题：
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed ______．
A.permanent magnetism
B.subpermanent magnetism
C.induced magnetism
D.variable magnetism
第3题：
What can we conclude from the recent study?
A. People think highly of science.
B. People hold mixed opinions about science.
C. Science is getting dangerously out of control.
D. Science is used for both good and bad purposes.
第4题：
Which descriptions of Netflow is correct？（）
- A、By default，Netflow records bidirectional IP traffic flow.
- B、Netflow answers questions regarding IP traffic：who，what，where，when，and how
- C、Netflow accounts for both transit traffic and traffic destined for the router.
- D、Netflow returns the subinterface information in the flow records.
正确答案:B,C,D
第5题：
A single vertical magnet placed underneath the compass in the binnacle is used to compensate for ______．
A.The horizontal component of the permanent magnetism
B.Deviation caused by the vessel's inclination from the vertical
C.Induced magnetism in the horizontal soft iron
D.Induced magnetism in the vertical soft iron
第6题：
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude ________．
A.Flinders bar
B.Soft iron spheres
C.Fore-and-aft permanent magnets in their trays
D.Heeling magnet
第7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 necessary
B.Semiannually
C.Annually
D.Every five years
第8题：
A. Either the -a or flag -b may be used, but not both.
B. If the flag -a is used then the flag -b also must be used.
C. One of the -a or -b flags must be used, but not both at the same time.
D. Both the flags may be used together, but neither are mandatory.
第9题：
Magnetism which is present only when the material is under the influence of an external field is called ______.
A.permanent magnetism
B.induced magnetism
C.residual magnetism
D.terrestrial magnetism
表现为仅仅当材料在外部磁场的影响下才有磁性叫做感应磁性。
第10题：
Which statement is correct about the use of the virtual interface on a WLC ？（）
- A、 Used to relay DHCP messages
- B、 Used to communicate with LAPs
- C、 Used to bring up LWAPP tunnels
- D、 Used to extend into the wireless client VLAN
正确答案:A