Directional Gyro Indicator: DGCA Air Navigation questions

Question 1

A directional gyro indicator is basically a:

Accepted Answer

Horizontal axis tied gyro

Answer

Horizontal axis earth gyro

Answer

Vertical axis earth gyro

Answer

Vertical axis tied gyro

Question 2

Apparent drift may be corrected in a DGI by:

Accepted Answer

Attaching a bias weight to the inner gimbal which makes the gyro precess in azimuth in the opposite direction to apparent wander

Answer

Causing the gyro to precess in a clockwise direction in the northern hemisphere

Answer

Attaching a bias weight to the inner gimbal which makes the gyro precess in azimuth in the same direction as apparent wander

Answer

Correcting wander by means of air jets

Question 3

An air driven DGI is corrected for apparent wander at 56°N. If the aircraft maintains a constant DGI reading, the true heading will:

Accepted Answer

Decrease when flying south from 56°N

Answer

Decrease when flying north from 56°N

Answer

Decrease when flying east from 56°N

Answer

Increase when flying west from 56°N

Question 4

The formula used to calculate apparent wander of a directional gyro in the northern hemisphere is:

Accepted Answer

-15 sine latitude in degrees per hour

Answer

+15 sine latitude in degrees for the time of running

Answer

+15 sine latitude in degrees per hour

Answer

15 sine latitude in degrees per hour increasing

Question 5

Errors of the directional gyro are:

Accepted Answer

Gimballing error, random wander, apparent wander, rotor speed error, transport wander

Answer

Acceleration error, turning error, altitude error, transport wander, rotor speed error

Answer

Gimballing error, looping error, rolling error, rotor speed error, transport wander

Answer

Transport wander, apparent wander, latitude error, turning error, acceleration error

5 more questions in this chapter