Results
Q1. An airborne instrument, equipped with a gyro with 2 degrees of freedom and a horizontal spin axis is:
a directional gyro
Q2. A directional gyro is: 1- a gyroscope free around two axis 2- a gyroscope free around one axis 3- capable of self- orientation around an earth-tied direction 4- incapable of self-orientation around an earth-tied direction The combination which regroups all of the correct statements is:
1.Apr
Q3. The characteristics of the directional gyro (DG) used in a gyro stabilised compass system are:
two degrees of freedom, whose horizontal axis corresponding to the reference direction is maintained in the horizontal plane by an automatic erecting system.
Q4. The directional gyro axis no longer spins about the local vertical when it is located:
on the equator
Q5. The directional gyro axis spins about the local vertical by 15°/hour :
on the North pole
Q6. The indications on a directional gyroscope or gyrocompass are subject to errors, due to: 1- rotation of Earth. 2- aeroplane motion on Earth. 3- lateral and transversal aeroplane bank angles. 4- north change. 5- mechanical defects. Choose the combination with true statements only:
1,2,3,5.
Q7. For an aircraft flying a true track of 360° between the 005°S and 005°N parallels, the precession error of the directional gyro due to apparent drift is equal to:
0°/hour
Q8. The indication of the directional gyro as an on-board instrument are valid only for a short period of time. The causes of this inaccuracy are: 1. The earth’s rotation 2. The longitudinal acceleration 3. The aircraft’s motion over the surface of the earth. 4. The mechanical defects of the gyro 5. The gyro’s weight 6. The gimbal mount of the gyro rings.
1,3,4,6
Q9. An airborne instrument, equipped with a gyro with 2 degrees of freedom and a horizontal spin axis is :
a directional gyro
Q10. The gimbal error of the directional gyro is due to the effect of:
a bank or pitch attitude of the aircraft
Q11. The heading read on the dial of a directional gyro is subject to errors, one of which is due to the movement of the aircraft. This error…
is dependent on the ground speed of the aircraft, its true track and the average latitude of the flight
Q12. The maximum directional gyro error due to the earth rotation is:
15°/hour
Q13. The pendulum type detector system of the directional gyro feeds :
a levelling erection torque motor
