AUTOMATIC FLIGHT & CONTROL SYSTEMS

Question 1

1. A single axis autopilot system:

Answer 1

d. Provides control about the roll axis

Question 2

2. A single axis autopilot may also be called:

Answer 2

b. Wing leveller

Question 3

3. An auto pilot:

Answer 3

c. is an auto stabilisation system

Question 4

4. The fundamental components of an autopilot control loop are:

Answer 4

a. Rate gyro, servomotor, error signal generator

Question 5

5. A device in a closed loop control system in which a small power input controls a much larger power output in a strictly proportionate manner is:

Answer 5

b. A servomechanism

Question 6

6. An automatic flight control system:

Answer 6

a. Is another name for an autopilot system

Question 7

7. An aircraft has yaw damping included in its auto stabilisation system. An essential requirement of such a system is:

Answer 7

a. A three axis autopilot system

Question 8

8. Automatic flight systems may be capable of controlling the aircraft flight in:

Answer 8

a. Azimuth, elevation and velocity

Question 9

9. An automatic flight control system is fitted with control wheel steering (CWS)

Answer 9

b. Manoeuvring commands may be input by applying normal forces to the control yoke
without first disengaging the autopilot

Question 10

10. During an approach to an autoland at 1500 feet:

Answer 10

b. Localiser is controlling the roll channel, off line channels are automatically engaged
and flare mode is armed

Question 11

11. What type of autoland system would be required for the landing to continue following a single failure below alert height:

Answer 11

c. Fail operational or fail active

Question 12

12. Inputs to the rudder channels initially originate from:

Answer 12

c. Compass gyro and turn and slip gyro

Question 13

13. An automatic flight system which can safely continue with an automatic landing after a system failure is a:

Answer 13

d. Fail operational system

Question 14

14. Altitude Select and Altitude Hold are examples of:

Answer 14

b. manometric functions from the ADC

Question 15

15. During an autoland the caption LAND 2 is illuminated. The system is:

Answer 15

b. Fail passive

Question 16

16. For an autoland system to meet FAIL PASSIVE criteria it must:

Answer 16

b. Withstand a system failure without excessive deviations from flight path

Question 17

17. During an autoland at 50 ft AGL (45’ GA) the pitch control of the autopilot is …………. and the roll control is ………………..

Answer 17

d. flare, localiser

Question 18

18. During an autoland approach:

Answer 18

c. flare is disengaged prior to touchdown at 5’GA

Question 19

19. In an autoland at 1000’ AGL with two autopilots engaged:

Answer 19

d. The engaged roll mode would be LOCALISER.

Question 20

20. An automatic flight control system in which the application of normal forces on the control column allows the pilot to input demands to the autopilot is a:

Answer 20

a. control wheel steering

Question 21

21. If a fault develops in a Triplex auto-pilot system during an approach, the system will revert to:

Answer 21

a. fail passive and the landing may continue.

Question 22

22. Central Air Data Computers (CADC’s) transmit data concerning;-

Answer 22

b. airspeed, altitude and Mach Number.

Question 23

23. Inner loop stability is obtained by;-

Answer 23

c. ‘I’ bar displacement.

Question 24

24. The auto-throttle is used to control some factors during the three primary control modes, they are:

Answer 24

a. EPR, Mach and Speed.

Question 25

The mode that enables the pilot to manoeuvre his aircraft in pitch and roll by use of the automatic control system is called the;-

Answer 25

a. control wheel steering (CWS )mode that allows the pilot to control the aircraft, and when the wheel is released, the aircraft holds the newly established attitude.

Question 26

Touch control steering:

Answer 26

c. allows the pilot to control the aircraft with the servomotors disengaged.

Question 27

A system which can still function without degradation of performance after a failure has:

Answer 27

c. fail operational ability.

Question 28

During a CAT 2 ILS automatic approach, the source for altitude information is the:

Answer 28

c. radio altimeter which becomes effective below about 2,500 feet.

Question 29

29. Heading hold mode relates to control in:

Answer 29

c. the roll channel via the outer loop control source.

Question 30

30. The system which allows the pilot to control the aircraft with the servomotors engaged is called:

Answer 30

b. control wheel steering.

Question 31

31. The type of automatic landing system which would necessitate a manual landing after a system failure during an automatic approach is:

Answer 31

a. fail passive.

Question 32

32. After a failure of one of the necessary redundant systems below alert height you would:

Answer 32

d. continue descent and land automatically.

Question 33

33. When localiser and glide slope are captured at 1,500 feet during an automatic landing sequence, two other functions will be activated at the same time, they are;-

Answer 33

d. flare mode arm and off line channels engaged.

Question 34

34. A fundamental requirement of a closed loop servo-mechanism is;-

Answer 34

d. feedback.

Question 35

35. ALT HOLD is an example of:

Answer 35

b. Outer loop input to the pitch channel

Question 36

A rate gyro:

Answer 36

c. Supplies rate and displacement information to the computer

Question 37

To prevent servo motor runaway from producing excessive demands to the control surface:

Answer 37

b. A torque limiter is fitted

Question 38

Autotrim is functional:

Answer 38

b. In the pitch channel only with the autopilot engaged

Question 39

L.NAV is an............. input to the ..............channel using data from the...........

Answer 39

c. outer loop, roll, FMC

Question 40

In an aircraft which requires a mach trim system it will apply inputs to the horizontal stabilizer:

Answer 40

d. At high subsonic speeds with the autopilot engaged or not.

Question 41

1. With the Autopilot engaged in the Alt mode the Captain alters the barometric setting. The aircraft:

Answer 41

a. maintains its altitude

Question 42

2. Control wheel steering enables a pilot to:

Answer 42

b. manoeuvre the aircraft in the air while the autopilot is engaged

Question 43

3. Autopilot synchronisation in an aircraft:

Answer 43

b. ensures that, when the autopilot is engaged, the take-over is effected smoothly and without snatching on the control system

Question 44

4. The rules for the use of Autotrim are that it:

Answer 44

d. operates only in conjunction with the autopilot.

Question 45

Consider the following statements regarding flight envelope protection: A High speed protection prevents the airspeed from exceeding Vmo/Mmo B High angle of attack protection comes in when the aircraft reaches the stalling AoA

Answer 45

d. Neither statement is correct.

Question 46

The control laws for an autopilot are known as:

Answer 46

d. normal, alternate and direct laws.

Question 47

An autoland system that, in the event of an autopilot failure, continues to function without degradation of performance beyond the limits required automatic, would be one with the status:

Answer 47

c. fail operational

Question 48

The Autoland. sequence is considered to be complete when:

Answer 48

b. the autopilot is manually disengaged by the pilot

Question 49

The Autothrottle will come on automatically even with the A/T switch OFF when:

Answer 49

a. in a FBW aircraft the AoA reaches a critical value called floor

Question 50

An aircraft on Autopilot is engaged in the VOR mode and loses the VOR signals as it flies through the VOR cone of silence. The autopilot:

Answer 50

d. decouples from the VOR and flies the last heading for a fixed period.

Question 51

13. For an aircraft with a non-synchronised autopilot system, ‘snatching’ of the controls by the autopilot when engaging or disengaging can be prevented by:

Answer 51

a. the pilot ensuring that the aircraft is trimmed out before selecting or disengaging the autopilot

Question 52

14. With the autopilot in CWS the pilot manoeuvres the aircraft and releases control. The aircraft will maintain:

Answer 52

d. attitude at the time of release.

Question 53

15. Autopilot corrections affecting Pitch are carried out by:

Answer 53

b. autotrim and elevators

Question 54

16. For a commercial aircraft operating with a single pilot in IFR the minimum requirement is that the autopilot should have control in:

Answer 54

c. Altitude Hold and Heading mode