Vayudoot Aviation

1. In northern hemisphere, during an acceleration in an easterly direction, the magnetic compass will indicate?

A heading of East.

An apparent turn to the South.

A decrease in heading.

2. The magnitude or variation?

has a maximum value of 45° E or 45°W.

has a maximum of 180°.

has a maximum of 90°.

3. Which of the following is an occasion for carrying out a compass swing on a Direct Reading Compass?

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

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

After any of the aircraft radio equipment has been changed due to un serviceability.

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

An isogonal.

An isoclinic.

An isogriv.

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

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

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

A longitudinal deceleration of a Westerly heading causes an apparent turn to the North

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

At the geographic equator.

Close to the magnetic North Pole.

Approximately midway between the magnetic poles.

7. The forces acting upon the compass needle in a stand-by compass in an aircraft, are

the earths magnetic field, the Coriolis effect and aircraft magnetism.

the earths magnetic field, the aircraft magnetic field and the effects of attitude and movement of the aircraft.

the total magnetic field in the compass location.

8. Select the correct statement

Whatever be the efforts made for accuracy, DRC is unreliable beyond 70° N / 70°

Whatever be the accuracy DRC can not be used beyond 70°N.

DRC with all 3 property can be used any where.

9. When decelerating on a westerly heading in the Northern hemisphere, the compass card of a direct reading magnetic compass will turn?

Anti-clockwise giving an apparent turn towards the north.

Anti-clockwise giving an apparent turn towards the south.

Clockwise giving an apparent turn toward the south.

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

90°.

45°.

60°.

11. 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) north

(1) over-read (2) south

(1) under-read (2) north

12. Isogonals converge at the?

North magnetic pole only.

Magnetic equator.

North and South geographic and magnetic poles.

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

Under reads.

Indicates the correct heading.

The heading indicates a turn to the south.

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

Greater than 235°.

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

Less than 235°

15. When turning right from 320° (C) to 050° (C) in the Southern hemisphere, the reading of a direct reading magnetic compass will?

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

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

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

16. 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 connects place with the same magnetic field strength.

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

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

17. In a remote indicating compass system the amount of deviation caused by aircraft magnetism and electrical circuits may be minimized by?

Using a vertically mounted gyroscope.

Mounting the detector unit in the wingtip.

Positioning the master unit in the center of the aircraft.

18. Which of the following statements is true of the Earth's magnetic field?

It acts like a large blue magnetic pole in Northern Canada.

It does not affect aircraft deviation.

It may be permanent, temporary, transient.

19. How is the direct reading magnetic compass made aperiodic or dead beat?

Using the lower possible viscosity liquid in the compass.

Using a pendulous suspension system for the magnetic assembly.

Positioning the magnetic assembly mass close to the compass point and using damping wires.

20. Given that T = 50 micro-tesla (m T), dip angle = 60, calculate H and Z

- [H = T X COS DIP, THEREFORE, IN THIS CASE H = 50 X COS 60, H = 25 MT, AND, Z = H X TAN DIP, THEREFORE, IN THIS CASE Z = 25 Z TAN 60, Z = 25 X 1.732 = 33.3 MT ]

- [H = T X COS DIP, THEREFORE, IN THIS CASE H = 50 X COS 60, H = 25 MT, AND, Z = H X TAN DIP, THEREFORE, IN THIS CASE Z = 25 Z TAN 60, Z = 25 X 1.732 = 43.3 MT ]

21. At the magnetic equator?

The isogonal is an agonic line.

Dip is Zero.

Deviation is Zero.

22. When accelerating on a westerly heading in the northern hemisphere, the compass card of a direct reading magnetic compass will turn?

Clockwise giving an apparent turn towards the south.

Clockwise giving an apparent turn towards the north.

Anti-clockwise giving an apparent turn towards the north.

23. An aircraft in the northern hemisphere is making an accurate rate one turn to the right. If the initial heading was 135° after 30 seconds the direct reading magnetic compass should read?

225°.

More than 225°.

Less than 225°.

24. Which of the following is the correct conversion from True to Compass? T V M D C

130 2E 132 -1 133.

130 2W 128 -1 127.

130 2E 128 -1 129.

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

Aclinic line.

Isogonal.

Agonic line.

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

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.

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

27. A magnetic compass will show an apparent turn to the north in the southern hemisphere when

the aircraft accelerates on 090° (C).

the aircraft accelerates on 000° (C).

the aircraft decelerates on 270° (C).

28. An aircraft's compass must be swung?

If the aircraft has been subjected to hammering.

Every maintenance inspection.

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

29. The north and south magnetic poles are the only positions on the earth's surface where?

A freely suspended compass needle will stand vertical.

A freely suspended compass needle will stand horizontal.

The value of magnetic variation equals 90°.

30. Disadvantage of Remote sensing compass over DRC is

Detector unit is exposed to high deviation errors.

Turning errors are increased.

Susceptible to electrical failure.

31. What will be the effect on its direct reading compass when an aircraft on Equator accelerates whilst traveling westwards

No change.

Indicates a increase in heading.

Indicates a decrease in heading.

32. What is the dip angle at the South Magnetic Pole?

00°.

90°.

180°.

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

It senses, rather than seeks, the magnetic meridian.

It has less moving parts.

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

34. Compass deviation is caused by

the angle of magnetic dip.

the angle of inclination.

aircraft magnetism distorting the earths magnetic field.

35. In direct reading magnetic compass, the effect of dip is countered by

the shape of the casing.

low center of gravity.

powerful magnets

36. Complete the following statement regarding magnetic variation. The charted values of magnetic variation on earth normally change annually due to?

An increasing field strength causing numerical values at all locations to increase.

Magnetic pole movement causing numerical values at all locations to increase or decrease.

Magnetic pole movement causing numerical values at all locations to increase.

37. The sensitivity of a direct reading compass varies?

Inversely with the vertical component of the earth's magnetic field.

Directly with the horizontal component of the earth's magnetic field.

Directly with the vertical component of the earth's magnetic field.

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

Clockwise giving an apparent turn toward the South.

Clockwise giving an apparent turn toward the north.

Anti-clockwise giving an apparent turn toward the south.

39. An aircraft is completing a timed turn in the Northern hemisphere from 330°C to 040°C. 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) under-read (2) increased.

(1) over-read (2) decreased.

(1) over-read (2) increased.

40. A ground feature appears 30° to the left on the center line of the CRT of an airborne weather radar. If the heading of the aircraft is 355°. (M) and the magnetic variation is 15°. East, the true bearing of the aircraft from the feature is?

310°.

130°.

160°.

41. Which of the following statements concerning the earth's magnetic field is completely correct?

Magnetic North rotates around true North showly.

Dip is the angle between total magnetic field and vertical field component.

Earth's Red Pole is situated in North Canada.

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

True North is East of Magnetic North.

True North is West of Magnetic North.

Magnetic North is West of Compass North.

43. At the magnetic equator?

Dip is zero.

Variation is zero.

Deviation is zero

44.
Magnetic dip 40°, H value = 23 unit, value of Z and T will be

- [(A) TANΘ = Z/H Z/23 = TAN40° Z = 19 XOA 40 = H/T T= 23/COS 40 = 30 A) 30/19 B) 18/24 C) 19/30 ]

- [(A) TANΘ = Z/H Z/23 = TAN40° Z = 19 XOA 40 = H/T T= 23/COS 40 = 30 A) 30/19 B) 18/24 C) 19/40 ]

45. Which of the following statements is correct concerning the effect of turning errors on a direct reading compass?

Turning errors are greatest on east/west headings, and are greatest at high latitudes.

Turning errors are greatest on north/south headings, and are greatest at high latitudes.

Turning errors are greatest on north/south headings, and are least at high latitudes.

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

More or less than 060° depending on the pendulous suspension used.

Less than 060°.

More than 060°.

47. What is the main cause of permanent magnetism in aircraft?

Hammering and the effect of the earth's magnetic field, whilst under construction.

The combined effect of aircraft electrical equipment and the terrestrial magnetic field.

Exposure to the terrestrial magnetic field during normal operation.

48. The purpose of compass check swing is to?

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

Cancel out the effects of the magnetic field found on board the aero plane.

Measure the angle between Magnetic North and Compass North.

49. The Earth can be considered as being a magnet with the?

Red pole near the north pole of the earth and the direction of the magnetic force pointing straight down to the earth's surface.

Blue pole near the north pole of the earth and the direction of the magnetic force pointing straight down to the earth's surface.

Blue pole near the north pole of the earth and the direction of the magnetic force pointing straight up the earth's surface.

50. A direct reading compass should be swung when?

The aircraft is stored for a long period and is frequently moved.

The aircraft has made more than a stated number of landings.

There is a large, and permanent, change in magnetic latitude.

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