Gyroscopes: DGCA Air Navigation questions

Question 1

Rigidity of a gyroscope depends on:

Accepted Answer

Mass, radius of gyration and speed of rotation

Answer

Weight, force applied and speed of rotation

Answer

Rate of precession and the force applied

Answer

Weight, rate of precession and speed of rotation

Question 2

A force is applied to deflect a gyroscope. If the rpm of the gyro is then doubled, the precession rate will:

Accepted Answer

Decrease

Answer

Remain as before

Answer

Increase

Answer

Cease altogether

Question 3

In gyroscopic theory the term topple is defined as:

Accepted Answer

Wander, real or apparent, in the vertical plane

Answer

Real wander only, in the horizontal plane

Answer

Real wander only, in the vertical plane

Answer

Wander, real or apparent, in the horizontal plane

Question 4

A force applied to the spinning axis of a rotor is precessed:

Accepted Answer

Through 90° in the direction of spin of the rotor

Answer

Through 90° in the direction of spin of the rotor in the northern hemisphere and through 90° in the opposite direction in the southern hemisphere

Answer

Through 270° in the direction of spin of the rotor

Answer

At a rate proportional to the speed of rotation of the gyro

Question 5

Real wander of a gyro can be caused by:

Accepted Answer

Asymmetrical friction at the spinning axis

Answer

Rotation of the earth

Answer

Increasing the rpm of the rotor

Answer

Moving the gyro north or south of its present position

4 more questions in this chapter, free with an account