Q1. The main advantage of electric gyros are:
high rpm, high moment of inertia, rapid build-up of speed, constant RPM
Q2. A gyro with only one degree of freedom is known as a:
rate gyro
Q3. Real wander of a gyro can be caused by:
asymmetrical friction at the spinning axis
Q4. A rate integrating gyroscope is used in: (i) inertial attitude system (ii) automatic flight control systems (iii) inertial navigation systems (iv) rate of turn indicators
i & iii
Q5. Gyro rigidity improves with?
Increasing RPM, mass and radial displacement of mass.
Q6. The number of degrees of freedom of a gyro is?
The same as the number of gimbals.
Q7. The yaw damper system, uses a.. proportional to…………….? and produces rudder inputs
Horizontal Axis rate gyro; yaw rate,
Q8. Which instrument has a 2 rotation in the horizontal axis?
Artificial horizon
Q9. A perfectly balanced space gyro at the equator has its spin axis aligned with true north. After 6 hours the axis will be aligned with:
true north direction
Q10. Rigidity increases with? (Duplicate Variant)
Increasing RPM and concentrating mass at the periphery.
Q11. Apparent wander of a gyro can be caused by:
rotation of the earth
Q12. In gyroscopic theory, the term ‘topple’ is defined as:
wander, real or apparent, in the vertical plane
Q13. The building principle of a gyroscope, the best efficiency is obtained through the concentration of the mass?
On the periphery and with a high rotation speed.
Q14. A rate integrating gyro is used in: A rate integrating gyro is used in: 1. inertial attitude unit; 2. autopilot system; 3. stabilizer servomechanism system; 4. inertial navigation unit; 5. rate of turn indicator
1 & 4
Q15. A force applied to the spinning axis of a rotor is precessed:
through 90Degrees in the direction of spin of the rotor
Q16. Transport wander when flying east at 300 Kts at 40 degrees south is?
4.2° per hour.
Q17. Apparent Drift Due to Earth rate at 25 degrees south is?
6.34Degrees per hour.
Q18. Transport wander when flying west at 300 Kts at 25 degrees north is?
2.33Degrees per hour.
Q19. The dither motor in a ring laser gyroscope?
Prevents laser lock.
Q20. The properties of a gyro are: (1) mass (2) rigidity (3) inertia (4) precession (5) rotational speed
2 & 4
Q21. Compared with a conventional gyro, a laser gyro?
Has a longer life cycle.
Q22. A turn indicator is built around a gyroscope with?
1 degree of freedom.
Q23. An airborne instrument, equipped with a gyro with 2 degrees of freedom and a horizontal spin axis is?
A directional gyro.
Q24. A vertical spin axis gyro, When viewed from above seen to rotate in Clockwise direction. If a force tends to push the right side downwards?
It will tilt upwards at the front.
Q25. The vertical reference unit of a three-axis data generator is equipped with a gyro with:
vertical axis with 2 degree of freedom
Q26. Transport wander when flying east at 400 Kts at 45 degrees north is?
-6.67° per hour.
Q27. Apparent Drift Due to Earth rate at 45 degrees north is?
-10.61° per hour.
Q28. A force is applied to deflect a gyroscope. If the rpm of the gyro is then doubled, the precession rate will:
decrease
Q29. The rigidity of a gyroscope depends on:
mass, radius of gyration and speed of rotation
Q30. A directional gyro requires?
Two gimbals, two degrees of freedom and a horizontal spin axis,
Q31. To obtain heading information a gyro-stabilized platform requires?
A horizontal axis and one degree of freedom.
Q32. Gyroscope rigidity is increased by… RPM and concentrating the mass at the … of the rotor?
Increasing; rim.
Q33. Transport wander when flying west at 300 Kts at 25 degrees south is?
-2.33° per hour.
Q34. The rigidity of a gyro is improved by: (Duplicate Variant 3)
increasing rpm and concentrating the mass on the periphery of the rotor
Q35. What is the maximum gyro drift rate that can be caused by earth rotation?
15° per hour.
Q36. A rate integrating gyro is used in: (Duplicate Variant 3)
an inertial navigation system
Q37. How many degrees of freedom and what spin axis will a gyro measuring vertical changes use?
2; Vertical.
Q38. Apparent Drift Due to Earth rate at the equator is?
Zero.
Q39. Which instrument uses a vertical gyroscope fined with a gravity erection device?
Artificial horizon,
Q40. A rate gyro is used in: 1. Attitude Indicator; 2. Heading Indicator; 3. Yaw Damper; 4. Turn Coordinator; 5. rate of turn indicator
3,4 & 5