Gyroscope Theory Quiz

Rigidity of a gyroscope depends on:

• weight, force applied and speed of rotation

• rate of precession and the force applied

• weight, rate of precession and speed of rotation

• mass, radius of gyration and speed of rotation

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

• remain as before

• increase

• decrease

• cease altogether

In gyroscopic theory the term ‘topple’ is deined as:

• real wander only, in the horizontal plane

• real wander only, in the vertical plane

• wander, real or apparent, in the vertical plane

• wander, real or apparent, in the horizontal plane

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

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

• 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

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

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

Real wander of a gyro can be caused by:

• asymmetrical friction at the spinning axis

• rotation of the earth

• increasing the rpm of the rotor

• moving the gyro north or south of its present position

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

• tied gyro

• earth gyro

• space gyro

• rate gyro

A perfectly balanced space gyro at the equator has its spin axis aligned with true north. Ater 6 hours the axis will be aligned with:

• true east direction

• true west direction

• true north direction

• true south direction

The main advantage of electric gyros are:

• light weight, high rpm, constant speed, inexpensive

• high rpm, only require low voltage DC, constant speed, sealed casing

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

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

Apparent wander of a gyro can be caused by:

• rotation of the earth

• clear air turbulence

• gimbal friction

• external torque

A directional gyro indicator is basically a:

• horizontal axis earth gyro

• horizontal axis tied gyro

• vertical axis earth gyro

• vertical axis tied gyro