COMPASS – Air – DGCA Question Bank For Politics

#1. A direct reading magnetic compass will be affected by?

Soft iron.

Hard iron.

Aluminium.

Soft Iron effect hard iron, and hard iron.

#2. The purpose of the torque motor in a gyro stabilised magnetic compass is to?

Precess the directional gyro.

Adjust the selsyn stator.

Calibrate the pointer.

Convert flux valve electrical output into pointer movement.

#3. When landing on a northerly heading a direct reading magnetic compass will indicate?

A westerly turn.

An easterly turn.

No turn.

Rapidly Increasing oscillations.

#4. Magnetic heading can be calculated from true heading using?

A compass and a map indicating isogonal lines.

A compass and a calibration card.

A calculator and a deviation card.

A compass and a deviation card.

#5. A direct reading compass will not be affected by?

Ferrous metals.

Transformers.

Magnetic fields.

Non-ferrous metals.

#6. The purpose of a compass swing is to?

Align the lubber lines with true north.

Confirm the accuracy of the schuler tuning.

Align compass north with magnetic north.

Align compass north with true north.

#7. When landing in a southerly direction a direct reading magnetic compass will indicate?

Easterly turn.

Westerly turn

No turn.

Rapidly increasing oscillations.

#8. Permanent magnetism in aircraft is caused by?

The hammering of rivets during construction.

Large changes in latitude.

Large changes in longitude

Strong electrical fields and lightening strikes.

#9. A magnetic compass must be swung?

After long term changes in latitude.

After long term changes in longitude.

Short term changes in longitude

Change of base airfield.

#10. The greatest cause of errors in a direct reading magnetic compass is?

Turning

Latitude changes

Parallax

Changes in magnetic deviation.

#11. The sensitivity of a magnetic compass can be affected by?

The H component of the earth's magnetic field.

The Z component of the earth's magnetic field.

Both of the above.

None of the above.

#12. When cruising on a westerly heading a direct reading magnetic compass will indicate?

Northerly turn.

Southerly turn

No turn

Rapidly increasing oscillations.

#13. When taking-off on a calm day on heading of 45° in the northern hemisphere, the compass will indicate ........ If the field is on an agonic line?

45°

More than 45°

Less than 45°

45° only if the wings are level.

#14. The flux gate of a gyro magnetic compass transmits data to?

The error detector

The amplifier

The erecting system

The annunciator.

#15. Magnetic heading can be found from true heading using?

A compass and a map showing isoclinal lines.

A compass and a map showing isogonal lines.

A compass and compass callbration chart.

A compass and deviation card.

#16. In a remote indicating magnetic compass the flux valve?

Uses a DC power supply

Uses an AC power supply.

Requires no power supply because it uses its own self-exciter unit...

Is manufactured from perm - alloy steel.

#17. The output of the flux valve is fed to the?

Feed back loop.

Compass card.

Amplifier.

Error detector.

#18. What is the strength of the H component of the earths magnetic field (in micro teslas) at the North pole?

1

10

16

23

#19. A direct reading magnetic compass will be affected by? 1. Adjacent electrical equipment. 2.Ferrous metals 3. Non-ferrous metals.

1, 2.

1, 3.

1, 4.

3, 4.

#20. Upon landing on a northerly heading a DRMC will indicate?

A turn to the east.

A turn to the west.

No turn

Oscillations about north.

#21. The principle cause of errors in a direct reading magnetic compass is?

Latitude

Magnetic deviation

Parallax

Turning.

#22. The function of the torque motor in a gyro stabilised magnetic compass is to?

Move the selsyn stators

Move the heading pointer.

Precess the directional gyro

Receive the input from the flux valve.

#23. Errors in direct reading magnetic compasses can be caused by?

Turns through 90 degrees East and 270 degrees west.

Acceleration son east/west headings.

Crosswinds when on east/west headings.

Parallax

#24. In an aircraft taking-off on a westerly heading in the northern hemisphere, what will its DRMC indicate?

Southerly turn.

Northerly turn.

Oscillations about west.

No turn

#25. To what does the flux valve of a gyro magnetic compass transmit information?

Errecting system

Error detector.

Amplifier

Heading indicator card.

#26. The purpose of a compass swing is to?

Align compass north with true north.

Align compass north with magnetic north.

Align true north with the lubber line.

Draw up a compass correction card.

#27. From what does the flux valve in a RIMC get its power supply ?

DC busbar

AC busbar

Internal self-exciter system

#28. A runway In the northern hemisphere is on an agonic line and heading 045 degrees. If an aircraft with zero compass deviation takes off in still air, what will the northerly turning errors be?

The compass will remain on 045

The compass will move to less than 045.

The compass will move to more than 045.

If the wings remain level the compass will remain on 045.

#29. In order to convert true heading into magnetic heading a compass card and ......... are required?

Deviation card.

Error card

Map with isogonal lines

Map with isoclinal lines.

#30. What will the DRMC indicate when an aircraft lands in a southerly direction in the southern hemisphere?

Westerly turn

Easterly turn

No turn

Oscillations about north.

#31. To improve the horizontality of a compass, the magnet assembly is suspended from a point?

On the centre line of the magnet.

Below the centre of gravity.

Above the centre of gravity.

Varying with magnetic latitude.

#32. A DRMC can be affected by?

Hard iron.

Mild iron

Soft iron

Northerly accelerations.

#33. The maximum gyro drift rate due to earth rate is?

5 degrees per hour

15 degrees per hour.

90 degrees per hour.

180 degrees per hour.

#34. At what DRMC heading is roll out received when conducting a turn from south-west to south -east at 45 degrees north?

115 degrees.

135 degrees.

140 degrees.

145 degrees.

#35. At what point on the earth would earth rate wander and transport wander be zero?

North pole.

Equator

South pole.

45 degrees north and south.

#36. From what does a gyro magnetic compass torque motor obtain its information?

Error detector.

Flux valve

Amplifier.

Rotor gimbal tilt unit.

#37. What is the maximum drift error that can be sensed by an uncompensated DGI?

5 degrees per hour.

10 degrees per hour.

15 degrees per hour.

#38. Magnetic dip angle at the south pole is?

zero

45 degrees.

60 degrees.

90 degrees.

#39. Earth rotation at 45 degrees north will cause the spin axis of a directional gyro to move?

7.6 degrees clockwise.

6.7 degreesanti-clockwise.

10.6 degrees clockwise.

10.6 degrees anti-clockwise.

#40. The DRMC in an aircraft accelerating for take-off on a runway with QDM 45 degrees, in the northern hemisphere, will indicate?

45 degrees

More than 45 degrees

Less than 45 degrees.

45 degrees as long as the wings are level.

#41. When turning right through 90 degrees to north, in the northern hemisphere, roll out should be conducted on a heading of?

10 degrees.

20 degrees.

330 degrees.

350 degrees.

#42. A magnetic compass must be swung after?

Long term change in latitude.

A short term change in latitude.

short term change in longitude.

#43. To what is the output of the flux valve in a remote indicating compass initially fed?

Amplifier

Gyro precessing torque motor.

Error detector.

Indicator.

#44. When turning from SE to SW at 50 degrees north, the roll out should occur at?

180 degrees.

210 degrees.

225 degrees.

245 degrees.

#45. When turning from SW to SE at 45 degrees north, the roll out should occur at?

115 degrees.

135 degrees.

140 degrees.

150 degrees.

#46. What will the compass indicate as an aircraft lands and decelerates on a westerly heading on the magnetic equator?

Turn to south.

Turn to west.

Oscillations.

No turn

#47. If the ADF pointer indicates 270 degrees when the RMI rose is stuck at 075 degrees, what is the relative bearing of the beacon?

290 degrees.

110 degrees.

195 degrees.

It cannot be determined from this information.

#48. What are the errors in a DGI? 1. Transport wander. 2. Earth rate. 3. Heading errors when banking and pitching. 4. Mechanical imperfections.

1, 2, 3.

1, 2, 4.

2, 3, 4.

All of the above

#49. What is the function of the latitude nut on a DI?

To correct coriolls effect.

To compensate for earth rate error.

To compensate for latitude error.

To compensate for transport error.

#50. What error is introduced into a DGI due to movement of the gyro earth?

Transport wander.

Earth rate error.

Altitude error

Latitude error.

#51. One of the factors causing error in a DRMC is?

Turning through east/west headings.

Crosswinds on west/east headings.

Parallax due to compass card oscillations

Accelerations on east/west headings

#52. The flux valve in a RIMC requires?

DC power supply

AC power supply

No external power supply.

AC and DC power supply.

#53. In the northern hemisphere, the direct reading compass card of an aircraft decelerating on an easterly heading will turn ....... and will ....... ?

Clockwise overhead.

Clockwise under read.

Anti-clockwise over read.

Anti- clockwise under read.

#54. If an aircraft in the northern hemisphere accelerates on a westerly heading, the compass needle moves ....... indicating a turn to the ......... ?

Clockwise north

Clockwise south.

Anti-Clockwise north

Anti-Clockwise south

#55. A perfectly frictionless DI is corrected to give zero drift at 30 degrees north, and its DI is set to indicate 100 degrees. If it remains stationary on the ground for 1 hour what will the indication be?

100 degrees.

92.5 degrees.

107.5 degrees.

75 degrees.

#56. If the ADF pointer indicates 240 degrees when the RMI rose is stuck at 090 degrees, what is the relative bearing of the beacon?

zero degrees.

150 degrees

180 degrees.

It cannot be determined from this information.

#57. How can deviation be determined using a magnetic compass?

By referring to the compass card.

By reference to a map of isoclinal lines.

By reference to a map of isogonal lines.

By reference to a compass deviation card.

#58. What will a DRMC indicate when taking -off on a runway with QDM 045 in the southern hemisphere?

Turn North.

Turn South.

No Turn.

Oscillations.

#59. The roll out must be performed at ........ when turning from SW to SE in the northern hemisphere?

135 degrees.

115 degrees.

145 degrees.

160 degrees.

#60. The roll out must be performed at .... when turning from NW to NE in the southern hemisphere?

025 degrees.

045 degrees.

055 degrees.

035 degrees.

#61. The roll out must be performed at .... when turning from NW to SE in the northern hemisphere?

145 degrees.

125 degrees.

155 degrees.

135 degrees.

#62. The roll out must be performed at .... when turning from NW to SE in the southern hemisphere?

115 degrees.

125 degrees.

135 degrees.

145 degrees.

#63. If the ADF pointer indicates 200 degrees when the RMI rose is stuck at 090 degrees, what is the relative bearing of the beacon?

290 degrees.

110 degrees.

180 degrees.

It cannot be determined from this information.

#64. If the ADF pointer indicates 270 degrees when the RMI rose is stuck at 090 degrees, what is the relative bearing of the beacon?

290 degrees.

110 degrees

180 degrees.

It cannot be determined from this information.

#65. If the ADF pointer indicates 120 degrees when the RMI rose is stuck at 080 degrees, what is the relative bearing of the beacon?

200 degrees.

80 degrees.

40 degrees.

It cannot be determined from this information.

#66. What will the compass indicate as an aircraft lands and decelerates on a westerly heading in the northern hemisphere?

Turn to south.

Turn to west.

Oscillations

No turn.

Dgca Question Bank For Pilots

Results

#1. A direct reading magnetic compass will be affected by?

#2. The purpose of the torque motor in a gyro stabilised magnetic compass is to?

#3. When landing on a northerly heading a direct reading magnetic compass will indicate?

#4. Magnetic heading can be calculated from true heading using?

#5. A direct reading compass will not be affected by?

#6. The purpose of a compass swing is to?

#7. When landing in a southerly direction a direct reading magnetic compass will indicate?

#8. Permanent magnetism in aircraft is caused by?

#9. A magnetic compass must be swung?

#10. The greatest cause of errors in a direct reading magnetic compass is?

#11. The sensitivity of a magnetic compass can be affected by?

#12. When cruising on a westerly heading a direct reading magnetic compass will indicate?

#13. When taking-off on a calm day on heading of 45° in the northern hemisphere, the compass will indicate ........ If the field is on an agonic line?

#14. The flux gate of a gyro magnetic compass transmits data to?

#15. Magnetic heading can be found from true heading using?

#16. In a remote indicating magnetic compass the flux valve?

#17. The output of the flux valve is fed to the?

#18. What is the strength of the H component of the earths magnetic field (in micro teslas) at the North pole?

#19. A direct reading magnetic compass will be affected by? 1. Adjacent electrical equipment. 2.Ferrous metals 3. Non-ferrous metals.

#20. Upon landing on a northerly heading a DRMC will indicate?

#21. The principle cause of errors in a direct reading magnetic compass is?

#22. The function of the torque motor in a gyro stabilised magnetic compass is to?

#23. Errors in direct reading magnetic compasses can be caused by?

#24. In an aircraft taking-off on a westerly heading in the northern hemisphere, what will its DRMC indicate?

#25. To what does the flux valve of a gyro magnetic compass transmit information?

#26. The purpose of a compass swing is to?

#27. From what does the flux valve in a RIMC get its power supply ?

#28. A runway In the northern hemisphere is on an agonic line and heading 045 degrees. If an aircraft with zero compass deviation takes off in still air, what will the northerly turning errors be?

#29. In order to convert true heading into magnetic heading a compass card and ......... are required?

#30. What will the DRMC indicate when an aircraft lands in a southerly direction in the southern hemisphere?

#31. To improve the horizontality of a compass, the magnet assembly is suspended from a point?

#32. A DRMC can be affected by?

#33. The maximum gyro drift rate due to earth rate is?

#34. At what DRMC heading is roll out received when conducting a turn from south-west to south -east at 45 degrees north?

#35. At what point on the earth would earth rate wander and transport wander be zero?

#36. From what does a gyro magnetic compass torque motor obtain its information?

#37. What is the maximum drift error that can be sensed by an uncompensated DGI?

#38. Magnetic dip angle at the south pole is?

#39. Earth rotation at 45 degrees north will cause the spin axis of a directional gyro to move?

#40. The DRMC in an aircraft accelerating for take-off on a runway with QDM 45 degrees, in the northern hemisphere, will indicate?

#41. When turning right through 90 degrees to north, in the northern hemisphere, roll out should be conducted on a heading of?

#42. A magnetic compass must be swung after?

#43. To what is the output of the flux valve in a remote indicating compass initially fed?

#44. When turning from SE to SW at 50 degrees north, the roll out should occur at?

#45. When turning from SW to SE at 45 degrees north, the roll out should occur at?

#46. What will the compass indicate as an aircraft lands and decelerates on a westerly heading on the magnetic equator?

#47. If the ADF pointer indicates 270 degrees when the RMI rose is stuck at 075 degrees, what is the relative bearing of the beacon?

#48. What are the errors in a DGI? 1. Transport wander. 2. Earth rate. 3. Heading errors when banking and pitching. 4. Mechanical imperfections.

#49. What is the function of the latitude nut on a DI?

#50. What error is introduced into a DGI due to movement of the gyro earth?

#51. One of the factors causing error in a DRMC is?

#52. The flux valve in a RIMC requires?

#53. In the northern hemisphere, the direct reading compass card of an aircraft decelerating on an easterly heading will turn ....... and will ....... ?

#54. If an aircraft in the northern hemisphere accelerates on a westerly heading, the compass needle moves ....... indicating a turn to the ......... ?

#55. A perfectly frictionless DI is corrected to give zero drift at 30 degrees north, and its DI is set to indicate 100 degrees. If it remains stationary on the ground for 1 hour what will the indication be?

#56. If the ADF pointer indicates 240 degrees when the RMI rose is stuck at 090 degrees, what is the relative bearing of the beacon?

#57. How can deviation be determined using a magnetic compass?

#58. What will a DRMC indicate when taking -off on a runway with QDM 045 in the southern hemisphere?

#59. The roll out must be performed at ........ when turning from SW to SE in the northern hemisphere?

#60. The roll out must be performed at .... when turning from NW to NE in the southern hemisphere?

#61. The roll out must be performed at .... when turning from NW to SE in the northern hemisphere?

#62. The roll out must be performed at .... when turning from NW to SE in the southern hemisphere?

#63. If the ADF pointer indicates 200 degrees when the RMI rose is stuck at 090 degrees, what is the relative bearing of the beacon?

#64. If the ADF pointer indicates 270 degrees when the RMI rose is stuck at 090 degrees, what is the relative bearing of the beacon?

#65. If the ADF pointer indicates 120 degrees when the RMI rose is stuck at 080 degrees, what is the relative bearing of the beacon?

#66. What will the compass indicate as an aircraft lands and decelerates on a westerly heading in the northern hemisphere?