Vayudoot Aviation

1. An electrically driven artificial horizon has less errors during the take-off run because

the roll cut-out speed is activated

the mercury level switches are more sensitive than the pendulous vanes fitted to air driven types

it is less pendulous, has a higher rotor speed and a linear acceleration cut out

it is less aperiodic than the air driven types

2. False nose-up attitude displayed on air driven artificial horizon during the take-off run is caused by

the linear acceleration cut out

incorrect rotor speed

the high pendulosity of the rotor

the lag of the lateral pendulous vanes

3. False right wing low attitude shown on an air driven artificial horizon during an acceleration is caused by

the logitudinal pendulous vanes

high rotor speed

the roll cut-out

the lag of the base of the rotor housing

4. Inside an artificial horizon

there is only one gimbal ring

the inner gimbal ring is pivoted laterally inside the outer gimbal ring and the outer gimbal ring is pivoted longitudinally inside the case

the rotor axis is kept level by a calibrated spring attached to the outer gimbal ring and the instrument case

the inner gimbal ring is tied to the vertical by a control system

5. During the take-off run an air driven artificial horizon will usually indicate

increased nose up attitude and right wing low.

nose up and incorrect left bank.

a false climbing turn to the left.

a false descending turn to the right.

6. An artificial horizon utilises (i)............ to show (ii)........ in (iii)....... and (iv).............

i) an earth gyro (ii) position (iii) latitude (iv) longitude

(i) an earth gyro (ii) latitude (iii) pitch (iv) roll

i) a space gyro (ii) attitude (iii) degrees (iv) minutes

(i) an earth gyro (ii) attitude (iii) pitch (iv) roll

7. The rotor axis of an electrical horizon is tied to the earth's vertical by

the low centre of gravity of the rotor housing

four pendulous vanes

two mercury level switches and two torque motors

the roll cut out

8. When an adjustable aircraft datum is fitted to an artificial horizon in light aircraft

it should be set to the central position and left there

it should be set to 15°

it should be checked at regular intervals

it should be rendered inoperative

Question Bank