11.5 - Avionic Systems

Question 1

You fly from Cardiff which has an actual pressure of 1013 (hec pascal) to Edinburgh at an indicated altitude of 1000ft. What is your altitude over Edinburgh when sea level pressure is 1025 (hec pascal)

Answer 1

1360ft

Question 2

Which of the following statements is true concerning ADC data calculations

Answer 2

The analogue ADC calculates all outputs in 3 modules at the same time

Question 3

What does the slaving annunciator of a compass system indicate

Answer 3

Indicates the difference between flux valve heading and the heading indication

Question 4

Which statement is correct about compass compensation

Answer 4

The deviation is recorded on the ground during a 360 degree turn

Question 5

Which components are used to measure the motion along the aircraft axels

Answer 5

Rate gyro

Question 6

What is the purpose of a stick shaker

Answer 6

To simulate the effect of a real stall on the flight controls

Question 7

Given an aircraft without a pressurised cabin, on which a leak has occurred in the static system while the aircraft is in level flight, which indications do you get

Answer 7

Altimeter shows slightly increasing values
Vertical speed indication shows correct data
Airspeed indicator slightly higher

Question 8

Which flight deck indications occur if the pitot tubes are completely blocked

Answer 8

Airspeed indicators show decreasing values

Question 9

Which parameter has the greatest effect on the static source errors (SSE)

Answer 9

Mach Number

Question 10

Concerning pitot static systems, what happens if there is an increase of water and the traps are already full

Answer 10

Instruments fluctuate, vert speed and alt normal function, airspeed is zero

Question 11

Which of the following statements are true for the pressure transducers used in ADC’s

Answer 11

In a digital ADC same transducer type is used for static and pitot pressure

Question 12

An aircraft is on the ground and the altimeter is set to QNH pressure. What height is displayed

Answer 12

Ground sea level, if QFE would = 0
Airport Elevation

Question 13

Which is correct about the ADIRU

Answer 13

The ADIRU has no pressure transducers but the computational part of the DADC and an IRU are intergrated

Question 14

Why does a vertical gyro required an erection system

Answer 14

Ensure gyro axis is vertical with the reference to the surface of the earth

Question 15

Hoe does the stick shaker move the control coloum

Answer 15

A motor causes the control coloum to vibrate

Question 16

What is deviation

Answer 16

It is the angle between the magnetic north and compass north

Compass
Deviation
Magnetic
Variation
True

Question 17

What is the function of the SSEC circuit in an ADC

Answer 17

The SSEC carries out a temperature compensation for the Mach module

Question 18

Why is there a difference between SAT and TAT indication

Answer 18

During flight the TAT is higher than the SAT due to the effect of ram rise

Question 19

The altimeter is set to the standard reference pressure and the actual sea level pressure decreases during flight, which is true

Answer 19

The pilot must adjust the baro setting to the new sea level pressure

Question 20

Which is indicated by pneumatic airspeed indicators

Answer 20

indicated Air Speed (IAS)

Question 21

What is the purpose of the stick shaker

Answer 21

To simulate the effect of a real stall on the flight controls

Question 22

Why is bandpass filter fitted in the yaw damper computer

Answer 22

To limit any changes for the yaw rate gyro

Question 23

Which auto throttle mode is automatically selected when the autopilot is in the vertical speed mode

Answer 23

Speed mode

Question 24

How can a heading on the control panel be selected

Answer 24

Heading selected mode

Question 25

When are autopilot upper modes available

Answer 25

Selectable when autopilot is engaged to CMD

Question 26

How does the pilot know when the aircraft is not correctly trimmed

Answer 26

When a steady elevator deflection is required to maintain a steady altitude

Question 27

Which mode of the thrust rating system provides the maximum thrust value for permanent operation

Answer 27

Maximum continuous thrust (MCT)

Question 28

What does the autopilot engage interlock monitor

Answer 28

Monitors all signals the autopilot needs for the inner loop in CMO and CWS

Question 29

Which autopilot controlling mode is used during cruise

Answer 29

Auto throttle uses speed mode and controls either a selected or FMC calculated speed or Mach number

Question 30

What is the flight director used for

Answer 30

To assist the pilot to fly the aircraft manually

Question 31

What is required to create a lateral flight plan in the FMC

Answer 31

The company route number tells the FMC how to create the flight plan from the navigational database

Question 32

What happens if the auto throttle is engaged and a throttle lever is moved manually

Answer 32

The auto throttle disengages automatically

Question 33

When can the autopilot control the speed of the aircraft

Answer 33

During decent

Question 34

Why are RF lines used

Answer 34

To transport radio signals with no interference

Question 35

What is the service interphone used for

Answer 35

Communicate with mechanics via jacks around the aircraft

Question 36

What’s the frequency 121.5Mhz used for

Answer 36

VHF emergency frequency

Question 37

Why is an antenna coupler used on a HF communication system

Answer 37

To make sure the antenna length is electrically married to the frequency in use

Question 38

Which statement correctly represents the relationship of frequency and antenna size

Answer 38

Higher the frequency, shorter the antenna

Question 39

Which statement is true for ACARS

Answer 39

It is used for manual and automatic data transfer between the aircraft and the ground in both directions

Question 40

What does the cockpit voice recorder (CVR) record

Answer 40

Captain, FO and third crew member audio signals and audio from the area mic

Question 41

Why are static discharges fitted to an aircraft

Answer 41

To discharge high static charges in flight, which generate high voltages and disturb radio reception

Question 42

Which priority sequence is used in a passenger address system

Answer 42

Cockpit crew, cabin crew, pre recorded announcements and boarding music

Question 43

Which frequency’s does the portable emergency located transmitter (ELT) transmit on

Answer 43

121.5Mhz, 243Mhz and 406Mhz only

Question 44

Which method is used by the ILS receiver to determine which marker beacon the aircraft is overflying

Answer 44

Each beacon uses different transmitter frequencies

Question 45

How does DME measure distance

Answer 45

The time between the interrogation and reply signal is proportional to the distance to the station

Question 46

Where is the weather scanner located

Answer 46

Located under the nose radome, and transmits the radar beam 180 degrees sweep in front of the aircraft

Question 47

What is the purpose of the two antenna fitted in an ADF system

Answer 47

Two antenna signals are required to determine correct direction

Question 48

What do the different colours on the weather radar mean

Answer 48

Red shows worst weather, yellow and green show less severe conditions

Question 49

What is automatic VOR

Answer 49

VOR frequency is automatically tuned

Question 50

How can the fixed ELT be activated

Answer 50

It is automatically activated when an acceleration of 5G in the longitudinal axis is exceeded

Question 51

Which is the frequency of the wave length of 20M

Answer 51

15Mhz

Question 52

Which statement is correct about TCAS

Answer 52

Detects other traffic if they have active transponders

Question 53

What is the maximum height indicated on a radio altimeter

Answer 53

2500ft

Question 54

Which height is measured by the radio altimeter

Answer 54

Height above the ground

Question 55

What is the purpose of the TA settings on the TCAS control panel

Answer 55

Gives traffic advisories and shows the white and amber traffic lights on the ND. RA’s are not available

Question 56

What is the purpose of fans

Answer 56

To improve aircraft comms, nav and ATC surveillance

Question 57

What happens when you apply a force to a gyro which acts in the direction of its axis

Answer 57

It will move in that direction, but there is no change in the direction of the gyro rotational axis

Question 58

Where are the engine instruments located on the flight deck

Answer 58

They are located in the center instrument panel

Question 59

Why is an over speed warning system fitted

Answer 59

To give an aural warning when maximum allowable speed is exceeded, independent of the indication

Question 60

When can the autopilot control the speed of the aircraft

Answer 60

During cruise

Question 61

Yaw damper deflects in which direction

Answer 61

The opposite direction of the yaw motion

Question 62

The EFIS display is divided into 2 important areas of information, what are they

Answer 62

Primary Flight Display (PFD) and Navigation Display (ND)

Question 63

Which method is used to disconnect the auto throttle system

Answer 63

Pushing either throttle lever disconnect push button

Question 64

What functions does the audio selector panel provide

Answer 64

It connects the microphone to the selected communication system and all the selected audio signals to the headphones

Question 65

How is the battery of the portable emergency locator transmitter activated

Answer 65

Automatically when it comes into contact with water

Question 66

How can the accurate position be determined using GPS

Answer 66

By using ground based radio stations to measure the aircraft position

Question 67

Which method is used by the ILS receiver to determine which marker beacon the aircraft is overflying

Answer 67

The morse code is different, but all beacons use the same frequency of 75.0 MHz with the same modulation

Question 68

Why are there two static ports for each static pressure system

Answer 68

To compensate for pressure differences due to side slip manoeuvres of the aircraft

Question 69

The Underwater Locating Beacon (ULB) is activated

Answer 69

By water entering the ULB and automatically switching it on

Question 70

Which system will give a warning if the aircraft flies too low an airspeed

Answer 70

The stall warning system

Question 71

What does it mean when the flight director roll bar moves to the left

Answer 71

The rudder must be moved to the left

Question 72

How does the FMS determine the current position of the aircraft durning flight

Answer 72

It calculates the present position from the most reliable sensor (IRS, GPS, radio NAV)

Question 73

Which mode of the auto throttle system is used during take off

Answer 73

Thrust mode (N1 or EPR)

Question 74

What does the inner loop of an auto pilot control

Answer 74

It controls the attitude of the aircraft and is always active

Question 75

Why are RF lines used

Answer 75

To transport a radio signal without disturbances

Question 76

How is the battery of the portable Emergency Locator Transmitter (ELT) activated

Answer 76

Automatically when it comes into contact with water

Question 77

Why are static discharges fitted to an aircraft

Answer 77

To discharge high static charges in flight which generate high voltages and disturb radio reception

Question 78

What happens if the pilot inadvertently operates the manual trim with auto trim engaged

Answer 78

The auto pilot disconnects and the trim system reverts to manual trim operation

Question 79

Which statement is true for the Flight Management System (FMS)

Answer 79

It calculates vertical and lateral navigation data for a safe and economical flight

Question 80

What is a Flight Director used for

Answer 80

It assists the pilot to fly the aircraft manually

Question 81

Which statement is true for VHF 1

Answer 81

It can be selected from any Radio Management Panel (RMP).

Question 82

What is automatic VOR

Answer 82

The bearing is automatically indicated on the RMI or ND

Question 83

Which priority sequence is used in a Passenger Address (PA) amplifier

Answer 83

1. Cockpit crew 2. Cabin crew 3. Pre recorded announcements 4. Boarding music

Question 84

What is the code 7700 used for

Answer 84

Code 7700 is an emergency code

Question 85

Where is the weather radar scanner located

Answer 85

It is located under the nose radome and transmits the radar beam in a 180deg sweep in front of the aircraft

Question 86

Which of the following statements are true for a differential GPS

Answer 86

It uses an additional ground station to increase the accuracy of the GPS position