THE DIRECT INDICATING COMPASS

Question 1

In a standby direct reading compass there is:

Answer 1

c. a circular magnet or pair of bar magnets pendulously mounted.

Question 2

The main requirements of a direct reading magnetic compass are that it should be:

Answer 2

d. aperiodic, horizontal, sensitive.

Question 3

For a position in the southern hemisphere, the effect of acceleration errors are greatest on headings:

Answer 3

d. 090 ° and 270 °

Question 4

An aircraft in the southern hemisphere is turning from a heading of 045 °C to 315 °C using a DGI. At the end of the turn the compass will read ……. than 315° and liquid swirl will ……. this effect.

Answer 4

d. less; decrease

Question 5

In a standby compass the magnet system is immersed in a transparent liquid. The purpose of this liquid is to:

Answer 5

a. increase sensitivity, increase aperiodicity.

Question 6

To improve the horizontality of a compass, the magnet assembly is suspended from a point:

Answer 6

c. above the centre of gravity.

Question 7

7. The magnitude, and sense, of turning error shown by a direct reading compass varies with:
8. the design of the compass.
9. the direction of the turn.
10. the rate of turn.
11. which hemisphere the aircraft is in.
12. the heading of the aircraft.
13. the amount of dip at the aircraft’s latitude.
    Of these statements:

Answer 7

d. all are correct.

Question 8

8. During a sustained turn ……. the nearer magnetic pole, the effect of liquid swirl will ……. compass turning error.

Answer 8

d. towards; increase.

Question 9

9. When carrying out a turn at the magnetic equator there will be:

Answer 9

c. a tendency to underread turns due to liquid swirl.