Vayudoot Aviation

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

Isogonal

Agonic line

Aclinic line.

Isotach

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

It requires less maintenance

It has less moving parts

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

It senses, rather than seeks, the magnetic meridian.

3. An aircraft is accelerating on a westerly heading in the northern hemisphere. Will the compass be over-reading or under-reading (i) and will it indicate a turn to the north or south (ii)?

(i) Under-reading (ii) North turn.

(i) Under-reading (ii) South turn.

(i) over-reading (ii) South turn.

(i) over-reading (ii) North turn.

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

The dip angle is between the vertical and the total magnetic force.

It does not affect aircraft deviation.

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

It may be permanent, temporary, transient.

5. Compass deviation is defined as the angle between?

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

True North and Compass North

True North and Magnetic North

Magnetic North and Compass North

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

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

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

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.

7. 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.

Anti-clockwise giving an apparent turn toward the north.

Clockwise giving an apparent turn toward the north.

Clockwise giving an apparent turn toward the south.

8. Isogonals are lines of equal?

Wind velocity

Compass deviation

Pressure

Magnetic variation

9. what is magnetic variation?

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

the angle between Magnetic Heading and Magnetic North.

the angle between magnetic North and True North

the angle between True North and Compass North.

10. An Agonic line is a line that connects?

Positions that have the same variations

Points of equal magnetic dip.

Positions that have 0° variation.

Points of equal magnetic horizontal field strength

11. 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 decrease the effect.

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

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

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

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

009º

033º

337º

339º

13. 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.

14. 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) under-read (2) north

(1) over-read (2) north

15. Isogonals converge at the?

North and south geographic and magnetic poles.

Magnetic equator

North magnetic pole only.

North and south magnetic poles only.

16. Isogonic lines connect positions that have?

The same angle of magnetic dip.

The same variation.

0° variation

The same elevation.

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

Using long magnets

Pendulous suspension of the magnetic assembly

Using the lowest acceptable viscosity compass liquid.

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

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

No change

Indicates a decrease in heading

Indicates an apparent turn to the North.

Indicates an increase an increase in heading.

19. The lines on the earth's surface that join points of equal magnetic variation are called?

Isogrives

Isogonals

Isoclines

Isotachs

20. The main reason for mounting the detector unit of a remote reading compass in the wingtip of an aeroplane is?

To maximise the units exposure to the earth's magnetic field.

To minimise the amount of deviation caused by aircraft magnetism and electrical circuits.

By having detector units on both wingtips, to cancel out the deviation effects caused by the aircraft strucure

To ensure that the unit is in the most accessible position on the aircraft for ease of maintenance.

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

An increase in heading

An apparent turn to the South.

A heading of East

A decrease in heading

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

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

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

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

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

23. At the magnetic equator?

Variation is zero.

The isogonal is an agonic line.

Deviation is zero

Dip is zero

24. The purpose of compass check swing is to?

Measure the angle between Magnetic North and Compass North.

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.

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

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.

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

26. The agonic line?

Is midway between the magnetic north and south poles.

Follows two separate paths out of the North polar regions. One currently passes through the USA while the other passes through Western Europe.

Is the shorter of the distance between the true and Magnetic North and south Poles.

Follows the geographical equator

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

Close to the magnetic South Pole.

Close to the magnetic north pole.

Approximately misway between the magnetic poles.

On the geographical equator.

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

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.

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.

29. If variation is West?

True North is West of Magnetic North

Compass North is West of Magnetic North

Magnetic North is West of compass North.

True North Is East of Magnetic North

30. 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?

Less than 060º

060º

More than 060º

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

31. The main advantage of a remote Indicating compass over a direct reading compass is that it?

Senses, rather than seeks, the magnetic meridian.

Requires less maintenance

Is able to magnify the earth's magnetic field in order to attain greater accuracy.

Has less moving parts.

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

The heading indicates a turn to the south.

Indicates the correct heading

Underreads

Overreads the heading

33. How is the direct reading magnetic compass made to be aperiodic (dead beat)?

By keeping the magnetic assembly mass close to the compass point and by using damping wires.

Using a pendulous suspension system for the magnetic assembly.

Using long magnets.

Using the lowest practicable viscosity compass liquid

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

A freely suspended compass needle will stand vertical.

Isogonals converge.

A freely suspended compass needle will stand horizontal.

The value of magnetic variation equals 90°

35. 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 up from the earth's surface.

Red pole near the north pole of the earth and the direction of the magnetic force pointing straight up from 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.

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

36. 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.

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

Not affected by deviation.

Lighter

37. Isogrives are lines that connect positions that have?

O° magnetic dip

The same variation

The same grivation

The same horizontal magnetic field strength

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

64°

00°

180°

90°

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

True 130 Variation 2W Magnetic 132 Deviation +1 C-133

True 130 Variation 2W Magnetic 132 Deviation +1 Compass 131

True 130 Variation 2E Magnetic 132 Deviation+1 C-133

True 130 Variation 2E Magnetic 132 Deviation+1 C-131

40. 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

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

It has no effect on aircraft deviation.

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

It may be permanent, temporary or transient.

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

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

An isogonal

An isovar.

An isogriv

An isocline

43. At a specific location, the value of magnetic variation?

Depends on the magnetic heading

Depends on the true heading

Depends on the type of compass installed

Varies slowly over time.

44. The value of magnetic variation?

Must be 0º at the magnetic equator.

Varies between a maximum of 45º East and 45º West.

Cannot exceed 90º

Has a maximum of 180º

45. 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) Under-read (ii) Increase

(i) Under-read (ii) Decrease

(i) Over-read (ii) Increase

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

Electrical currents in internal wiring and electrical storms.

Exposure to the terrestrial magnetic field during normal operation.

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.

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

Compensating for deviation

Setting the 'heading' pointer.

Synchronising the magnetic and gyro compass elements

Setting local magnetic variation

48. Permanent magnetism in aircraft arises chiefly from?

Exposure to the earth's magnetic field during normal operation.

The effect of internal wiring and exposure to electrical storms.

The combined effect of aircraft electrical equipment and the earth's magnetic field.

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

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

A reducing field strength causing numerical values at all locations to decrease.

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

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

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

50. Sensitivity of a direct reading magnetic compass is?

inversely proportional to horizontal component of the magnetic field of the earth.

proportional to horizontal component of the magnetic field of the earth.

inversely proportlonal to the vertical and horizontal components of the magnetic field of the earth.

proportional to the vertical component of the magnetic field of the earth.

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