Instruments | Gyroscopic Instruments

Question 1

NH: Drift is to the

SH: Drift is to the

Mnemonic -

Answer 1

right = clockwise (-)

left `= anti-clockwise (+)

Northern the countries are always right

Question 2

In a directional gyro, gimballing errors are due to:

Answer 2

a banked attitude

Question 3

A control system consisting of four pendulous vanes is used in:

Answer 3

an air driven artificial horizon

The electric AH use torque motors

Question 4

A gravity erector system is used to correct the errors on:

Answer 4

an artificial horizon

Because, the AH need to be in the true vertical, not aircraft vertical.

Question 5

Difference between turn indicator and turn coordinator:

Answer 5

The turn indicator cannot indicate bank, only rate of turn. The turn cordinator can indicate bank as well as turn rate

Question 6

The latitude at which the apparent wander of a directional gyro is equal to 0 is:

Answer 6

the equator

Question 7

Does weight influence turn rate or radius?

Answer 7

No.

Question 8

A directional gyro consists of a: NB: the rotor spin axis is not counted for the number of degrees of freedom of a gyro.

Answer 8

2 degrees-of-freedom horizontal axis gyro

Question 9

The DGI is kept in the aircraft vertical by -

Answer 9

a levelling erection torque motor, jets or wedge plates

Question 10

For a directional gyro, the system which detects the local vertical supplies:

Answer 10

a levelling erection torque motor

Question 11

The gyro axis of an electric artificial horizon is tied to the:

Answer 11

earth’s vertical by two mercury level switches and two torque motors

Question 12

Is local and aircraft vertical the same?

Answer 12

No. Local vertical is earth vertical

Question 13

A gyro-magnetic compass or heading reference unit is an assembly which always consists of:

Answer 13

a directional gyro

an earth’s magnetic field detector

a synchronising control

Question 14

Gyrscopes:

In which vertical is the DGI, AH(electrical and air) kept and which tools are utilized:

Answer 14

DGI in the aircraft aircrafts vertical(yawing PLANE) using air jets, wedge plate, or torque motor.

AH in earth vertical, using pendulous vane unit, or for the electrical AH two leveling switches which activates two torque motors.

Question 15

Mnemonic to remember transport wander:

Answer 15

NH - I (moving west reading will increase)

NH - D (moving east reading will decrease)