Vayudoot Aviation

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

more; increase

more; decrease

less; decrease

less; increase

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

180 ° and 360 °

135 ° and 315 °

090 ° and 270 °

045 ° and 225 °

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

varying with magnetic latitude.

on the centre line of the magnet.

above the centre of gravity.

below the centre of gravity.

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

increase sensitivity, reduce liquid swirl.

increase sensitivity, decrease aperiodicity.

increase sensitivity at high latitudes, lubricate bearings.

increase sensitivity, increase aperiodicity.

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

away from; not affect.

away from; increase.

towards; not affect.

towards; increase.

6. In a standby direct reading compass there is

a low magnetic moment system, either of circular or bar configuration.

a single pendulously mounted bar magnet.

a non-pendulously mounted magnet system.

a circular magnet or pair of bar magnets pendulously mounted.

7. The magnitude, and sense, of turning error shown by a direct reading compass varies with: 1. the design of the compass. 2. the direction of the turn. 3. the rate of turn. 4. which hemisphere the aircraft is in. 5. the heading of the aircraft. 6. the amount of dip at the aircraft's latitude.

only 1, 2, 5 and 6 are correct.

only 2, 4 and 5 are correct.

only 1, 3, 5 and 6 are correct.

all are correct.

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

tendency to underread turns through south and overread turns through north.

no turning error.

no turning error when turning through east or west

tendency to underread turns due to liquid swirl.

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

positioned directly in front of the pilot, easily corrected for magnetic deviation, aperiodic.

horizontal, sensitive, periodic.

aperiodic, horizontal, sensitive.

easily read, floating in a transparent liquid, quick to react to change in aircraft heading.

Question Bank

Questions for THE DIRECT INDICATING COMPASS