THE DIRECT INDICATING COMPASS – Air – DGCA Question Bank For Politics

#1. In a standby direct reading compass there is:

a non-pendulously mounted magnet system.

a single pendulously mounted bar magnet.

a circular magnet or pair of bar magnets pendulously mounted.

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

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

horizontal, sensitive, periodic.

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

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

aperiodic, horizontal, sensitive.

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

180 ° and 360 °

045 ° and 225 °

135 ° and 315 °

090 ° and 270 °

#4. 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

less; increase

more; decrease

less; decrease

#5. 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, reduce liquid swirl.

#6. 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.

#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 1, 3, 5 and 6 are correct.

only 2, 4 and 5 are correct.

all are correct.

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

away from; increase.

towards; not affect.

away from; not affect.

towards; increase.

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

no turning error.

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

tendency to underread turns due to liquid swirl.

no turning error when turning through east or west

Dgca Question Bank For Pilots

Results