Q1. Compass deviation is defined as the angle between: *
Magnetic North and Compass North –
Q2. Grivation is the combination of *
Variation and Grid Convergence –
Q3. Isogrivs are lines that connect positions that have: *
the same grivation –
Q4. Which of the following statements concerning earth magnetism is completely correct?
An isogonal is a line which connects places with the same magnetic variation, the Aclinic is the line of zero magnetic dip –
Q5. A line drawn on a chart which joins all points where the value of magnetic variation is zero is called an:
agonic line –
Q6. Isogonals are lines of equal: *
magnetic variation –
Q7. Isogonal lines converge as follows: *
At the North and South Magnetic and both Geographical Poles –
Q8. The north and south magnetic poles are the only positions on the earth’s surface where:
a freely suspended compass needle will stand vertical –
Q9. An aircraft’s compass must be swung: *
If the aircraft has been subjected to hammering. – Correct!
Q10. The Earth can be considered as being a magnet with the: *
blue pole near the north pole of the earth and the direction of the magnetic force pointing straight down to the earth’s surface –
Q11. What is a line of equal grivation? *
An isogriv – Correct!
Q12. The value of variation: *
cannot exceed 180° –
Q13. Deviation applied to magnetic heading gives: *
compass heading –
Q14. The value of magnetic variation on a chart changes with time. This is due to:
Movement of the magnetic poles, which can cause either an increase or a decrease –
Q15. The angle between True North and Magnetic North is called : *
variation –
Q16. What is the definition of magnetic variation? *
The angle between Magnetic North and True North. – Correct!
Q17. The agonic line: *
indicates zero variation –
Q18. What is the value of the magnetic dip at the magnetic south pole ? *
90° –
Q19. The horizontal component of the earth’s magnetic field: *
is approximately the same at magnetic latitudes 50°N and 50°S –
Q20. The value of magnetic variation: *
has a maximum of 180° –
Q21. At the magnetic equator: *
Dip is zero –
Q22. When is the magnetic compass most effective? *
About midway between the magnetic poles –
Q23. The angle between Magnetic North and Compass North is called: *
compass deviation –
Q24. A negative (westerly) magnetic variation signifies that: *
True North is East of Magnetic North –
Q25. A compass swing is performed in order to correct for: *
deviation –
Q26. If variation is East, then: *
True North is West of Magnetic North – Correct!
Q27. Isogonals converge at the: *
North and South geographic and magnetic poles –
Q28. An Agonic line is a line that connects: *
positions that have 0° variation –
Q29. Which of these is a correct statement about the Earth’s magnetic field? *
It acts as though there is a large blue magnetic pole in Northern Canada –
Q30. At a specific location, the value of magnetic variation: *
varies slowly over time –
Q31. The sensitivity of a direct reading compass varies: *
directly with the horizontal component of the earth’s magnetic field –
Q32. What is the dip angle at the North Magnetic Pole? *
90° – Correct!
Q33. The lines on the earth’s surface that join points of equal magnetic variation are called:
isogonals –
Q34. Isogrives are lines that connect positions that have: *
the same grivation –
Q35. The sensitivity of a direct reading magnetic compass is: *
Proportional to the horizontal component of the Earth’s magnetic field. –
Q36. Complete the following statement regarding magnetic variation. The charted values of magnetic variation on earth normally change annually due to:
magnetic pole movement causing numerical values at all locations to increase or decrease –
Q37. Which of the following statements concerning the earth’s magnetic field is completely correct?
The blue pole of the earth’s magnetic field is situated in North Canada –
Q38. Isogonic lines connect positions that have: *
the same variation –
Q39. What is the maximum possible value of Dip Angle at either Pole? *
90° – Correct!
