Daily Revision Questions

Question 1

1_The north and south magnetic poles are the only positions on the earth’s surface where a) A freely suspended magnet will stand vertical b) A freely suspended magnet will stand horizontal c) A position where the horizontal component of the Earth’s magnetic field is a maximum d) The value of magnetic variation is 90 degrees

Answer 1

a) A freely suspended magnet will stand vertical

Question 2

2_The direction of True North for any observer is a) The direction of the observer’s meridian to the North Pole b) The reading of the observer’s compass corrected for deviation and local variation c) The direction of the Greenwich meridian to the North Pole d) The direction of the observer’s magnetic north corrected for local variation

Answer 2

a) The direction of the observer’s meridian to the North Pole

Question 3

3_If the Compass Heading is 265 degrees variation is 33 degrees west and deviation is 3 degrees east what is the True Heading a) 229 degrees b) 235 degrees c) 225 degrees d) 231 degrees

Answer 3

b) 235 degrees

Question 4

4_Given Compass Heading = 233 True Track = 256 Drift angle = 10 degrees right Deviation = -3 degrees What is the variation a) 16 degrees East b) 10 degrees East c) 10 degrees West d) 20 degrees West

Answer 4

a) 16 degrees East

Question 5

5_The fix of the aircraft position is determined by radials from three VOR stations The measurements contain small random errors known as systematic errors and unknown systematic errors The measured radials are corrected for known systematic errors and plotted on a navigation chart What is the most probable position of the aircraft a) 1 b) 2 c) 3 d) 4

Answer 5

c) 3

Question 6

6_An NDB is located at position (S 26 W 005 42) The variation at the NDB is 6W The position of the aircraft is (S 60 W 010 00W) The variation at the aircraft position is 11W The initial TT of the great circle from the aircraft position to the NDB position is 1015 degrees What is the magnetic bearing of the NDB from the aircraft a) 1085 b) 1145 c) 1105 d) 1125

Answer 6

a) 1085

Question 7

7_Given True Track 245 degrees Drift 5 degrees right Compass Heading 242 Calculate the deviation a) 5 degrees west b) 5 degrees east c) 1 degree east d) 1 degree west

Answer 7

d) 1 degree west

Question 8

8_Deviation on the standby compass is a) Positive if Compass North is to the west of Magnetic North b) Negative if Compass North is to the west of Magnetic North c) Zero at all times d) None of the above

Answer 8

b) Negative if Compass North is to the west of Magnetic North

Question 9

9_Which of the following variables affect deviation a) Magnetic latitude b) Aircraft heading c) Aircraft altitude d) Aircraft electronic equipment

Answer 9

d) Aircraft electronic equipment

Question 10

10_Given True Track = 245 Drift = 5 degrees right Variation = 3 degrees west Compass heading = 242 degrees Magnetic heading = a) 237 degrees b) 247 degrees c) 245 degrees d) 243 degrees

Answer 10

a) 237 degrees

Question 11

11_Given Variation = 6W Signal lines Jan 2002 Average annual increase 10 minutes Calculate the variation in 2005 a) 65 degrees west b) 55 degrees west c) 63 degrees west d) 53 degrees west

Answer 11

c) 63 degrees west

Question 12

12_Which of the following statements about hard and soft iron in relation to magnetism is correct a) Hard iron magnetism is permanent in nature and soft iron magnetism is non-permanent b) Both hard and soft iron magnetism are of a non-permanent nature c) Hard iron magnetism is non-permanent in nature and soft iron magnetism is permanent d) Both hard and soft iron magnetism are of a permanent nature

Answer 12

a) Hard iron magnetism is permanent in nature and soft iron magnetism is non-permanent

Question 13

13_The direction of magnetic north at a certain position coincides with the direction of a) The great circle to the magnetic north pole b) The isogonic line to the magnetic north pole c) The isoclinic line to the magnetic north pole d) The horizontal component of the Earth’s magnetic field

Answer 13

a) The great circle to the magnetic north pole

Question 14

14_You are tracking the 090 degree radial inbound to a VOR and your true heading is 060 degrees At the VOR you track the 090 radial outbound and are showing a 6DME The variation is +5 and the TAS is 240 knots What is the WV that has affected the aircraft a) 310/45 knots b) 325/50 knots c) 310/50 knots d) 325/45 knots

Answer 14

b) 325/50 knots

Question 15

15_In a remote indicating compass system the amount of deviation caused by the aircraft magnetism and electrical circuits may be minimized by a) Mounting the detector unit (flux valve) in the wingtip b) Mounting the flux valve in the cockpit c) Positioning the gyro scope in the center of the aircraft d) Using a vertically mounted gyro instead of a horizontally mounted one

Answer 15

c) Positioning the gyro scope in the center of the aircraft

Question 16

16_Near the magnetic pole a) The vertical component of the Earth’s magnetic field is too small to permit the use of a normal compass b) The horizontal component of the Earth’s magnetic field is too small to permit the use of a normal compass c) Variation is maximally affected by magnetic poles d) Magnetic inclination is minimally affected near magnetic poles

Answer 16

b) The horizontal component of the Earth’s magnetic field is too small to permit the use of a normal compass

Question 17

17_The long term periodic change in the Earth’s Magnetic Field is a) Reflected in the slow movement of the magnetic poles b) Caused by major excavations near the magnetic poles c) Caused by sunspot activity d) Caused by supernova explosions

Answer 17

a) Reflected in the slow movement of the magnetic poles

Question 18

18_The directive force a) Is the component of the Earth’s magnetic field which aligns the compass needle b) Equals the vertical component of the Earth’s magnetic field c) Is zero at the geographic poles d) Is about twice as strong at 60°N as on the equator

Answer 18

a) Is the component of the Earth’s magnetic field which aligns the compass needle

Question 19

19_The horizontal component of the Earth’s magnetic field a) Is minimum at the magnetic equator b) Is very small close to the magnetic poles c) Is maximum at the magnetic poles d) Increases with an increase in magnetic latitude

Answer 19

b) Is very small close to the magnetic poles

Question 20

20_The direction Magnetic North at a position on the earth is a) The direction to the magnetic north pole b) The angle between the position and the magnetic north pole c) The direction of the horizontal component of the Earth’s magnetic field at that position d) The compass north at that position corrected for variation

Answer 20

c) The direction of the horizontal component of the Earth’s magnetic field at that position

Question 21

21_A definition of a magnetic track angle is a) The direction of a line referenced to magnetic north b) The direction of a longitudinal axis of an aircraft to compass north c) The direction of a line referenced to isogonic line to the magnetic north pole d) Compass north

Answer 21

c) The direction of a longitudinal axis of an aircraft to compass north

Question 22

22_With an increase in magnetic latitude there will be a decrease in the a) Angle of dip b) Directive force c) Total magnetic force of the Earth’s magnetic field d) Vertical component of the Earth’s magnetic field

Answer 22

b) Directive force

Question 23

23_When descending on an easterly heading in the Northern hemisphere the compass card of a direct reading magnetic compass will turn a) Anti-clockwise giving an apparent turn toward the south b) Clockwise giving an apparent turn toward the south c) Clockwise giving an apparent turn toward the north d) Anti-clockwise giving an apparent turn toward the north

Answer 23

b) Clockwise giving an apparent turn toward the south

Question 24

24_Sensitivity of a direct reading magnetic compass is a) Proportional to the vertical component of the magnetic field of the earth b) Inversely proportional to the vertical and horizontal components of the magnetic field of the earth c) Inversely proportional to horizontal component of the magnetic field of the earth d) Proportional to horizontal component of the magnetic field of the earth

Answer 24

d) Proportional to horizontal component of the magnetic field of the earth

Question 25

25_The turning right from 320°(C) to 050°(C) in the Southern hemisphere the reading of a direct reading magnetic compass will a) Over-indicate the turn and liquid swirl will decrease the effect b) Under-indicate the turn and liquid swirl will increase the effect c) Over-indicate the turn and liquid swirl will increase the effect d) Under-indicate the turn and liquid swirl will decrease the effect

Answer 25

b) Under-indicate the turn and liquid swirl will increase the effect

Question 26

26_An aircraft is completing a timed turn in the Northern hemisphere from 330° to 060° After the turn has been stopped but before the director indicating compass settles down will the compass 1) Over-read or under-read 2) and (3) Its error increased or decreased by liquid swirl a) Over-read increased b) Over-read decreased c) Under-read decreased d) Under-read increased

Answer 26

c) Under-read decreased

Question 27

27_What is magnetic variation a) The angle between Magnetic North and True North b) The angle between Magnetic Heading and Magnetic North c) The angle between the direction indicated on the compass and Magnetic North d) The angle between True North and Compass North

Answer 27

a) The angle between Magnetic North and True North

Question 28

28_An aircraft in the northern hemisphere makes an accurate rate one turn to the right/left If the initial heading was 330° after 30 seconds of turn the direct reading magnetic compass should read a) 060° b) More or less than 060° depending on the pendulous suspension used c) Less than 060° d) More than 060°

Answer 28

d) More than 060°

Question 29

29_How is the direct reading magnetic compass made aperiodic or dead beat a) By using a pendulous suspension system for the compass card b) Using the lowest possible weight for the compass card c) By using a counterweight to oppose the tilt of the compass d) Using a liquid filled container to dampen oscillations

Answer 29

d) Using a liquid filled container to dampen oscillations

Question 30

30_Which of the following is the correct conversion from True to Compass a) 130 2W 127 b) 130 2E 132 c) 130 5W 125 d) 130 3W 133

Answer 30

a) 130 2W 127

Question 31

31_The horizontal component of the Earth’s magnetic field a) Weakens with increasing distance from the magnetic poles b) Weakens with increasing distance from the nearer magnetic pole c) Is approximately the same at all magnetic latitudes less than 60° d) Is approximately the same at magnetic latitudes 50° and 59°

Answer 31

c) Is approximately the same at all magnetic latitudes less than 60°

Question 32

32_What is the maximum value of dip that can be caused by the vertical component of terrestrial magnetism a) 45° b) 50° c) 60° d) 90°

Answer 32

d) 90°

Question 33

33_Which of the following is correct when the variation is West a) True North is East of Magnetic North b) Magnetic North is West of Compass North c) True North is West of Magnetic North d) Compass North is West of Magnetic North

Answer 33

a) True North is East of Magnetic North

Question 34

34_A line drawn on a chart which joins all points where the value of magnetic variation is zero is called an a) Agonic line b) Aclinic line c) Isogonic line d) Isotach

Answer 34

a) Agonic line