Vayudoot Aviation

1. Apparent wander of a gyro can be caused by

external torque.

clear air turbulence.

rotation of the earth.

gimbal friction.

2. A force is applied to deflect a gyroscope. If the RPM of the gyro is then doubled the precession rate will

decrease

remain as before.

cease altogether.

increase

3. In gyroscopic theory the term ‘topple' is defined as

wander, real or apparent, in the vertical plane.

wander, real or apparent, in the horizontal plane.

real wander only, in the horizontal plane.

real wander only, in the vertical plane.

4. Real wander of a gyro can be caused by

increasing the RPM of the rotor.

moving the gyro north or south of its present position

rotation of the earth.

asymmetrical friction at the spinning axis.

5. The main advantage of electric gyros are

high RPM, only require low voltage DC, constant speed, sealed casing.

light weight, high RPM, constant speed, inexpensive

high RPM, high moment of inertia, rapid build-up of speed, constant RPM.

sealed casing, constant speed, high precession rate, low cost.

6. In gyroscopic theory the term ‘drift' is defined as

real wander only, in the horizontal plane.

wander, real or apparent, in the vertical plane.

apparent wander only, in the horizontal plane.

wander, real or apparent, in the horizontal plane

7. Rigidity of a gyroscope depends on:

weight, rate of precession and speed of rotation.

rate of precession and the force applied.

weight, force applied and speed of rotation.

mass, radius of gyration and speed of rotation.

8. A gyro with only one degree of freedom is known as a

space gyro.

tied gyro.

earth gyro.

rate gyro.

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

through 90° in the direction of spin of the rotor.

at a rate proportional to the speed of rotation of the gyro.

through 270° in the direction of spin of the rotor.

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

10. 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 west direction.

true south direction.

true north direction.

true east direction.

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