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单选题
Compass error is equal to the（）.
A
deviation minus variation
B
variation plus compass course
C
combined variation and deviation
D
difference between true and magnetic heading
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Error may be introduced into a magnetic compass by ______.A.making a structural change to the vesselB.a short circuit near the compassC.belt bucklesD.All of the above
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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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public class IfTest （ public static void main（string[]args） { int x = 3； int y = 1； if （x = y） system.out.printIn（“Not equal”）； else system.out.printIn（“Equal”）； } ） What is the result？（） A、 The output is “Equal”B、 The output in “Not Equal”C、 An error at line 5 causes compilation to fall.D、 The program executes but does not print a message.
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考题
单选题Which statement about the Flinders bar of the magnetic compass is CORRECT（）.A
It compensates for the error caused by the vertical component of the Earth's magnetic fieldB
It compensates for error caused by the heeling of a vesselC
It compensates for quadrantal deviationD
It is only needed in equatorial waters
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What is the result？（）A
The program runs and prints nothing.B
The program runs and prints “Equal”.C
An error at line 5 cause compilation to fail.D
The program runs but aborts with an exception.
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单选题A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment? （）A
If the quadrantal spheres are all the way out，replace them with smaller spheresB
If the quadrantal spheres are all the way in，replace them with larger spheresC
If the quadrantal spheres are all of the way out，move the spheres inD
If the quadrantal spheres are all the way out，replace them with larger spheres.
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单选题When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）A
The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headingsB
After the new heading is reached，the vessel should steam on that course for at least two minutes before the adjustmentC
During the course change，you should gently tap the compass to remove any error caused by friction on the pivot bearingD
After steadying on the new heading，the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error
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单选题A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment? （）A
Move the quadrantal spheres closer to the compassB
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Raise or lower the athwartship magnets
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单选题A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment? （）A
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单选题The compass rose on a nautical chart indicates both variation and （）.A
deviationB
annual rate of variation changeC
precessionD
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考题
单选题Variation is a compass error that you（）.A
can correct by adjusting the compass cardB
can correct by adjusting the compensating magnetsC
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cannot correct
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单选题What is an advantage of the magnetic compass aboard vessels?（）A
Compass error is negligible at or near the earth's magnetic polesB
It does not have to be checked as oftenC
It is reliable due to it's essential simplicityD
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单选题What is the basic principle of the magnetic compass（）.A
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单选题My gyro-compass error is（）.A
east two degreesB
two degrees eastC
two east degreesD
two-degrees east
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单选题If the gyrocompass error is east，what describes the error and the correction to be made to gyrocompass headings to obtain true headings?（）A
The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain trueB
The readings are too low and the amount of the error must be subtracted from the compass to obtain trueC
The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain trueD
The readings are too high and the amount of the error must be subtracted from the compass to obtain true
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单选题public class IfTest （ public static void main（string[]args） { int x = 3； int y = 1； if （x = y） system.out.printIn（“Not equal”）； else system.out.printIn（“Equal”）； } ） What is the result？（）A
The output is “Equal”B
The output in “Not Equal”C
An error at line 5 causes compilation to fall.D
The program executes but does not print a message.
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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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