更多"Before a magnetic compass is adjust"的相关试题:
[单项选择]Before switching on gyro-compass，you should make sure that the power supply on board is（）.
A. high or low
B. AC or DC
C. strong or weak
D. on or off
[单项选择]The compass error of a magnetic compass that has no deviation is（）.
A. zero
B. equal to variation
C. eliminated by adjusting the compass
D. constant at any geographical location
[单项选择]（）the repeater compass with the master compass, please.
A. Similize
B. Clock
C. Synchronize
D. Position
[单项选择]（）the repeater compass with the master compass，please.
A. Similize
B. Clock
C. Synchronize
D. Position
[单项选择]Which statement regarding garbage disposal is correct?（）
A. Records for ground garbage disposal are not required when disposal into the sea occurs more than 25 miles offshore
B. Discharging or transfer of garbage while in port to a shore facility must he recorded
C. Maintaining records for the incineration of garbage aboard ship is not required
D. The recording of garbage disposal should include the approximate weight
[单项选择]Coast Pilots and navigational charts are kept corrected and up-to-date by using the（）.
A. pilot charts
B. Notices to Mariners
C. Tide Tables
D. Current Tables
[单项选择]（） that everything in the engine crankcase is correct, start up the crankcase lubricating oil pump.
A. To satisfy
B. To be satisfied
C. After satisfying
D. After being satisfied
[单项选择]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
[单项选择]The standard magnetic compass heading differs from the true heading by（）.
A. compass error
B. latitude
C. variation
D. deviation
[单项选择]The principal purpose of magnetic compass adjustment is to（）.
A. reduce the variation as much as possible
B. reduce the deviation as much as possible
C. reduce the magnetic dip as much as possible
D. allow the compass bowl to swing freely on its gimbals
[单项选择]What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
A. Quadrantal spheres
B. Heeling magnets
C. Athwartships magnets
D. Fore-and-aft magnets
[单项选择]The magnetic compass operates on the principle that（）.
A. like magnetic poles attract
B. unlike magnetic poles repel
C. unlike poles attract
D. the poles of the compass line up with the geographic poles of the earth
[单项选择]The Flinders bar on a magnetic compass compensates for the（）.
A. induced magnetism in vertical soft iron
B. induced magnetism in horizontal soft iron
C. permanent magnetism in ship's steel
D. vessel's inclination from the vertical
[单项选择]The compass deviation changes as the vessel changes（）.
A. geographical position
B. speed
C. heading
D. longitude
[单项选择]Compass deviation is caused by（）.
A. magnetism from the earth's magnetic field
B. misalignment of the compass
C. magnetism within the vessel
D. a dirty compass housing
[单项选择]My gyro-compass error is（）.
A. east two degrees
B. two degrees east
C. two east degrees
D. two-degrees east
