Vayudoot Aviation

1. Which of the following is correct when the variation is West?

Magnetic North is West of Compass North

True North is West of Magnetic North.

Compass North is West of Magnetic North.

True North is East of Magnetic North.

2. What is the maximum value of dip that can be caused by the vertical component of terrestrial magnetism?

60º

180º

45º

90º

3. what is magnetic variation?

the angle between True North and Compass North.

the angle between the direction indicated on the compass and Magnetic North.

the angle between magnetic North and True North

the angle between Magnetic Heading and Magnetic North.

4. Isogonals converge at the?

North magnetic pole only.

Magnetic equator

North and south magnetic poles only.

North and south geographic and magnetic poles.

5. At what point on the earth is a magnetic compass most effective?

Close to the magnetic South Pole.

Close to the magnetic North Pole.

Approximately midway between the magnetic poles.

At the geographic equator

6. An aircraft's compass must be swung?

After a change of theatre of operations which leads to a change of magnetic longitude.

Every maintenance inspection.

If the aircraft has been subjected to hammering.

If the aircraft has been in the hangar for a long time and has been moved several times.

7. The agonic line?

Follows the geographic equator

Follows seperate paths out of the North polar regions, one currently running through Western Europe and the other through the USA

Is midway between the magnetic North and South Poles.

Is the shorter distance between the respective True and Magnetic North and South Poles.

8. Which of the following is true of the value of magnetic variation?

It cannot exceed 90º

It is 0º at the magnetic equator.

It varies between 45º East and 45º West.

It cannot exceed 180º

9. At which point on the surface of the earth is a magnetic compass most effective?

Approximately misway between the magnetic poles.

Close to the magnetic north pole.

Close to the magnetic South Pole.

On the geographical equator.

10. When using a direct reading magnetic compass in the northern hemisphere?

A longitudinal deceleration on an Westerly heading causes an apparent turn to the North.

A longitudinal acceleration on a Westerly heading causes an apparent turn to the South.

A longitudinal acceleration on an Easterly heading causes an apparent turn to the North

A longitudinal acceleration on an Easterly heading causes an apparent turn to the South.

11. The direct reading magnetic compass is made aperiodie (dead beat) by?

Using the lowest acceptable viscosity compass liquid.

Using long magnets

Pendulous suspension of the magnetic assembly

Keeping the magnetic assembly mass close to the compass point and by using damping wires

12. An aircraft is over position HO (55° 30'N 060 15'W), where YYR VOR (53° 30'N 060° 15'W) can be received. The magnetic variation is 31° W at HO and 28° W at YYR. What is the radial from YYR?

031°

332°

208°

028°

13. The annunciator of a remote Indicating compass system is used when?

Synchronising the magnetic and gyro compass elements

Setting local magnetic variation

Compensating for deviation

Setting the 'heading' pointer.

14. What is the main advantage of a remote indicating compass compared to a direct reading compass is that it?

It magnifies the earth's magnetic field in order to attain greater accuracy.

It has less moving parts

It requires less maintenance

It senses, rather than seeks, the magnetic meridian.

15. The main reason for usually mounting the detector unit of a remote indicating compass in the wingtip of an aeroplane is to?

Place it in a position where there is no electrical wiring to cause deviation errors.

Place it where it will not be subjected to electrical or magnetic interference from the aircraft.

Reduce the amount of deviation caused by aircraft magnetism and electrical circuits

Facilitate easy maintenance of the unit and increase its exposure to the Earth's magnetic field.

16. When accelerating on an easterly heading in the Northern hemisphere, the compass card of a direct reading magnetic compass will turn?

Anti-clockwise giving an apparent turn toward the south.

Clockwise giving an apparent turn toward the south.

Anti-clockwise giving an apparent turn toward the north.

Clockwise giving an apparent turn toward the north.

17. What is the compass heading if true track is 348º, drift is 17º left, variation is 32º W, and deviation is 4ºE?

033º

339º

337º

009º

18. What is the name for a line of equal magnetic variation?

An isogriv

An isocline

An isovar.

An isogonal

19. An aircraft using a direct reading magnetic compass in the Northern hemisphere starts a Rate 1 turn to the right from 145°C. What will be the Indicated heading if it rolls out of the turn after 30 seconds?

Greater than 235°

Less than 235°

235°

It is not possible to answer this question using the information given.

20. What is the angle between True North and Magnetic North?

Drift

Dip

Deviation.

Variation

21. An aircraft is accelerating in the Northern hemisphere heading West. Will a direct reading magnetic compass (1) over-read or under read and (2) Indicate a turn to the north or to the south?

(1) over-read (2) south

(1) under-read (2) south

(1) over-read (2) north

(1) under-read (2) north

22. An aircraft in the northern hemisphere makes an accurate rate one turn to the right/starboard. If the initial heading was 330º, after 30 seconds of the turn the direct reading magnetic compass should read?

More or less than 060ºdepending on the pendulous suspension used.

More than 060º

060º

Less than 060º

23. You are turning from 330°C to 040°C in the northern hemisphere. At the time that you stop the turn, but before the compass settles down, will the compass over-read or under -read (i), and will liquid swirl tend to increase or decrease the error (ii) ?

(i) Over-read (ii) Decrease

(i) Over-read (ii) Increase

(i) Under-read (ii) Increase

(i) Under-read (ii) Decrease

24. Why does the value of magnetic variation on a chart changes with time?

Increase in the magnetic field, causing an increase.

Reduction in the magnetic field, causing a decrease

Movement of the magnetic poles, which can cause either an increase or a decrease.

Movement of the magnetic poles, causing an increase.

25. Which of the following statements about the earth's magnetic field is most accurate?

The dip angle is the angle between the total magnetic field and the earth vertical.

It may be permanent, temporary or transient.

It has no effect on aircraft deviation.

It acts as if there were a large blue magnetic pole in northern Canada

26. The sensitivity of a direct reading magnetic compass is?

Proportinal to the horizontal component of the earth's magnetic field.

Proportional to the vertical component of the earth's magnetic field.

Directly proportional to the horizontal and vertical components of the earth's magnetic field.

Inversely proportional to the horizontal and vertical components of the earth's magnetic field.

27. Isogonals are lines of equal?

Magnetic variation

Pressure

Compass deviation

Wind velocity

28. When turning right from 320º(c) to 050º(C) In the Southern hemisphere, the reading of a direct reading magnetic compass will?

Under-indicate the turn and liquid swirl will increase the effect.

Over-Indicate the turn and liquid swirl decrease the effect.

Over-indicate the turn and liquid swirl will increase the effect

Under-indicate the turn and liquid swirl will decrease the effect.

29. Given: Magnetic heading 311°, Drift angle 10°left, Relative bearing of NDB 270°, What is the magnetic bearing of the NDB measured from the aircraft?

180°

208°

221°

211°

30. What advantage does the remote indicating or slaved gyro compass have in comparison to the direct reading magnetic compass?

Is more sensitive because it senses the earth's magnetic field rather than seeking it.

Not affected by deviation.

More accurate because it is not connected to any source of electrical power.

Lighter

31. Which of the following is the correct conversion from True to Compass?

True north 130, Variation 2W Magnetic 128 Deviation -1 , Compass127

True north 130, Variation 2E, Magnetic 128 ,Deviation -1 , Compass 127

True north 130, Variation 2E, Magnetic 132, Deviation -1, Compass 133

True north 130, Variation 2w, Magnetic 132, Deviation -1, Compass 133

32. Compass deviation is defined as the angle between?

Magnetic North and Compass North

The horizontal and the total intensity of the earth's magnetic field

True North and Magnetic North

True North and Compass North

33. Which of the following is an occasion for carrying out a compass swing on a direct reading compass?ng out a compass

Before an aircraft goes on any flight that involves a large change of magnetic latitude

After an aircraft has passed through a severe electrical storm, or has been struck by lightning.

After any of the aircraft ratio equipment has been changed due to unserviceability.

whenever an aircraft carries a large freight load regardless of its content.

34. 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.

An isogonal is a line which connects places with the same magnetic variation; the agonic line is the line of zero magnetic dip.

An isogonal is a line which connects places of equal dip; the aclinic is the line of zero magnetic dip.

An isogonal is a line which connects places with the same magnetic variation ; the aclinic connects places with the same magnetic field strength.

35. The purpose of compass check swing is to?

Cancel out the horizontal component of the earth's magnetic field.

Cancel out the vertical component of the earth's magnetic field.

Cancel out the effects of the magnetic fields found on board the aeroplane.

Measure the angle between Magnetic North and Compass North.

36. A negative (westerly) magnetic variation signifies that?

True North is West of Magnetic North

Compass North is East of Magnetic North

Compass North is West of Magnetic North

True North is East of Magnetic North

37. If variation is West?

True North Is East of Magnetic North

Compass North is West of Magnetic North

True North is West of Magnetic North

Magnetic North is West of compass North.

38. An aircraft is completing a timed turn in the Northern hemisphere from 330ºC to 040ºC. After the turn has been stopped but before the direct indicating magnetic compass settles down, will the compass (1) over-read or under-read, and (2) is this error increased or decreased by liquid swirl?

(1) over-read (2) decreased.

(1)over-read (2) increased

(1) under-read (2) decreased

(1) under-read (2) increased

39. Concerning direct reading magnetic compasses, in the northern hemisphere, it can be said that?

On a Westerly heading, a longitudinal deceleration causes an apparent turn to the North.

On an Easterly heading, a longitudinal acceleration causes an apparent turn to the North.

On a Westerly heading, a longitudinal acceleration causes an apparent turn to the South.

On an Easterly heading, a longitudinal acceleration causes an apparent turn to the South.

40. When an aircraft on a westerly heading on the northern hemisphere accelerates, the effect of the acceleration error causes the magnetic compass to ?

Indicate a turn towards the south

Indicate a turn towards the north.

Lag behind the turning rate of the aircraft

Turn faster than the actual turning rate of the aircraft.

41. The angle between Magnetic north and compass north is called?

compass error

magnetic variation

compass deviation

alignment error

42. What are indicated by isogrivs on a chart?

Lines of equal effective horizontal magnetic force.

Lines of equal magnetic dip.

Lines of zero magnetic variation

Lines of equal grivation

43. At the magnetic equator?

Variation is zero.

Deviation is zero

The isogonal is an agonic line.

Dip is zero

44. The horizontal component of the earth's magnetic field?

Weakens with Increasing distance from the magnetic poles.

Is approximately the same at all magnetic latitudes less than 60º

Weakens with Increasing distance from the nearer magnetic pole.

Is approximately the same at magnetic latitudes 50º N and 50ºS.

45. What is the title of a line of equal magnetic variation?

An isogonal

An isocline

An isogriv

An isobar

46. A line drawn on a chart which joins all points where the value of magnetic variation is zero is called an?

Isogonal

Aclinic line.

Isotach

Agonic line

47. Isogrives are lines that connect positions that have?

O° magnetic dip

The same horizontal magnetic field strength

The same grivation

The same variation

48. Isogrivs on a chart indicate lines of ?

Equal magnetic dip

Zero magnetic variation.

Equal grivation

Equal horizontal directive force

49. Why does the value of magnetic variation on a chart change with time?

Movements of the magnetic poles, cause it to increase or decrease.

Reductions in the magnetic field, cause it to decrease.

Movements of the magnetic poles, cause it to increase

Increases in the magnetic field, cause it to increase

50. At the magnetic equator, when accelerating after take off on heading West, a direct reading compass?

Indicates the correct heading

The heading indicates a turn to the south.

Overreads the heading

Underreads

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