Assessment Test


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1. C3 - Magnetic compass deviation __________.

 

2. C3 - It is a semicircular deviation which is proportional to the cosine twice of the compass heading.

 

3. C3 - It is a coefficient used to identify the semicircular deviation which is proportional to the cosine of the compass heading?

 

4. C3 - Isogonic lines are lines on a chart and what does it indicates?

 

5. C3 - If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?

 

6. C3 - If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE?

 

7. C3 - Deviation in a compass is caused by the __________.

 

8. C3 - As a vessel changes course to starboard, the compass card in a magnetic compass __________.

 

9. C3 - A vessel is heading magnetic northwest and its magnetic compass reads a heading of 318 deg. What action should be taken to remove this error dutring compass adjustment?

 

10. C3 - A vessel heading NNW is on a course of __________.

 

11. C3 - A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.

 

12. C3 - Besides variation, what does the compass rose on a nautical chart also indicates?

 

13. A ship is heading 350° per gyro compass and 358.5° per standard compass. The gyro error is 1.5°E and the variation is 6°W. Find the deviation.

 

14. C3 - The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?

 

15. C3 - You are proceeding up a channel at night. It is marked by a range which bears 185°T. You steady up on a compass course of 180° with the range in line dead ahead. What does this indicates?

 

16. C3 - Your ship is heading magnetic north and its magnetic compass indicates a heading of 007˚. What action should be taken during compass adjustment to remove this error?

 

17. C3 - At 1337 Z on July 17, in DR position LAT 30° 56.8' S, LONG 039° 36.5' W; you observe amplitude of the Moon. The upper limb of the moon is on the visible horizon, bearing 263.0°psc. The variation is 20°W. What is the deviation?

 

18. C3 - At 1524 ZT on 14 June, in DR position LAT 30°51'N, LONG 30° 02'W, you observe amplitude of the Moon. The center of the Moon is on the visible horizon and bears 103.9°pgc. The variation is 10°W. What is the gyro error?

 

19. C3 - Deviation is the angle between the __________.

 

20. C3 - Magnetic variation changes with a change in __________.

 

21. C3 - The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply?

 

22. C3 - Your ship is steaming at night with the gyropilot engaged when you notice that the vessel's course is slowly changing to the right. What action should you take FIRST?

 

23. C3 - Your ship is heading magnetic north and its magnetic compass indicates a heading of 354˚. What action should be taken during compass adjustment to remove this error?

 

24. C3 - Which would influence a magnetic compass?

 

25. C3 - Which statement about the Flinders bar on a magnetic compass is correct?

 

26. C3 - Which statement about gyrocompass error is TRUE?

 

27. C3 - When adjusting a magnetic compass for error, a deviation table should be made __________.

 

28. C3 - What would happen if the compass heading and the magnetic heading are the same?

 

29. C3 - What then if the compass heading and the magnetic heading are the same?

 

30. C3 - What should be done when a magnetic compass is not in use for a prolonged period of time?

 

31. C3 - What lines on a chart which connect points of equal magnetic variation are called?

 

32. C3 - What lines are indicated on a chart by an Isogonic lines?

 

33. C3 - What is the most accurate method of determining gyrocompass error while underway?

 

34. C3 - What is the compass error of a magnetic compass that has no deviation?

 

35. C3 - What is called as the gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction?

 

36. C3 - What is an error in a gyrocompass caused by rapid changes in course, speed and latitude causing deviation before the gyro can adjust itself?

 

37. C3 - What indicates in the agonic line on an isomagnetic chart?

 

38. C3 - What happens to the compass card in a magnetic compass when a vessel changes course to starboard?

 

39. C3 - What does the vessel changes when compass deviation changes?

 

40. C3 - What does the agonic line on an isomagnetic chart indicates?

 

41. C3 - What do you call those Lines on a chart which connect points of equal magnetic variation?

 

42. C3 - What coefficient is proportional to the sine of the compass heading?

 

43. C3 - What caused Variation in a compass?

 

44. C3 - What aspect where Magnetic variation changes?

 

45. C3 - What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?

 

46. C3 - Variation in a compass is caused by __________.

 

47. C3 - True heading differs from magnetic heading by __________.

 

48. C3 - To find a magnetic compass course from a true course you must apply __________.

 

49. C3 - The vertical component of the Earths magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?

 

50. C3 - The total magnetic effects which cause deviation of a vessels compass can be broken down into a series of components which are referred to as __________.

 

51. C3 - The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass?

 

52. C3 - The principal purpose of magnetic compass adjustment is to __________.

 

53. C3 - The permanent magnetism of a vessel may change in strength due to __________.

 

54. C3 - The most accurate method of determining gyrocompass error while underway is by __________.

 

55. C3 - The Flinders bar on a magnetic compass compensates for the __________.

 

56. C3 - The directive force of a gyrocompass __________.

 

57. C3 - On an isomagnetic chart, what is the line of zero variation?

 

58. C3 - Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________.Q

 

59. C3 - Magnetism which is present only when the material is under the influence of an external field is called __________.

 


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