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Mod 11 > 11.5 - Avionic Systems > Flashcards

11.5 - Avionic Systems Flashcards

1
Q

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)

A

1360ft

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2
Q

Which of the following statements is true concerning ADC data calculations

A

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

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3
Q

What does the slaving annunciator of a compass system indicate

A

Indicates the difference between flux valve heading and the heading indication

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4
Q

Which statement is correct about compass compensation

A

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

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5
Q

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

A

Rate gyro

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6
Q

What is the purpose of a stick shaker

A

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

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7
Q

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

A

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

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8
Q

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

A

Airspeed indicators show decreasing values

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9
Q

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

A

Mach Number

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10
Q

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

A

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

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11
Q

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

A

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

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12
Q

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

A

Ground sea level, if QFE would = 0
Airport Elevation

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13
Q

Which is correct about the ADIRU

A

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

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14
Q

Why does a vertical gyro required an erection system

A

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

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15
Q

Hoe does the stick shaker move the control coloum

A

A motor causes the control coloum to vibrate

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16
Q

What is deviation

A

It is the angle between the magnetic north and compass north

Compass
Deviation
Magnetic
Variation
True

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17
Q

What is the function of the SSEC circuit in an ADC

A

The SSEC carries out a temperature compensation for the Mach module

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18
Q

Why is there a difference between SAT and TAT indication

A

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

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19
Q

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

A

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

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20
Q

Which is indicated by pneumatic airspeed indicators

A

indicated Air Speed (IAS)

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21
Q

What is the purpose of the stick shaker

A

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

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22
Q

Why is bandpass filter fitted in the yaw damper computer

A

To limit any changes for the yaw rate gyro

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23
Q

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

A

Speed mode

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24
Q

How can a heading on the control panel be selected

A

Heading selected mode

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25
Q

When are autopilot upper modes available

A

Selectable when autopilot is engaged to CMD

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26
Q

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

A

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

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27
Q

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

A

Maximum continuous thrust (MCT)

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28
Q

What does the autopilot engage interlock monitor

A

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

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29
Q

Which autopilot controlling mode is used during cruise

A

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

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30
Q

What is the flight director used for

A

To assist the pilot to fly the aircraft manually

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31
Q

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

A

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

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32
Q

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

A

The auto throttle disengages automatically

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33
Q

When can the autopilot control the speed of the aircraft

A

During decent

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34
Q

Why are RF lines used

A

To transport radio signals with no interference

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35
Q

What is the service interphone used for

A

Communicate with mechanics via jacks around the aircraft

36
Q

What’s the frequency 121.5Mhz used for

A

VHF emergency frequency

37
Q

Why is an antenna coupler used on a HF communication system

A

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

38
Q

Which statement correctly represents the relationship of frequency and antenna size

A

Higher the frequency, shorter the antenna

39
Q

Which statement is true for ACARS

A

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

40
Q

What does the cockpit voice recorder (CVR) record

A

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

41
Q

Why are static discharges fitted to an aircraft

A

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

42
Q

Which priority sequence is used in a passenger address system

A

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

43
Q

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

A

121.5Mhz, 243Mhz and 406Mhz only

44
Q

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

A

Each beacon uses different transmitter frequencies

45
Q

How does DME measure distance

A

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

46
Q

Where is the weather scanner located

A

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

47
Q

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

A

Two antenna signals are required to determine correct direction

48
Q

What do the different colours on the weather radar mean

A

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

49
Q

What is automatic VOR

A

VOR frequency is automatically tuned

50
Q

How can the fixed ELT be activated

A

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

51
Q

Which is the frequency of the wave length of 20M

A

15Mhz

52
Q

Which statement is correct about TCAS

A

Detects other traffic if they have active transponders

53
Q

What is the maximum height indicated on a radio altimeter

A

2500ft

54
Q

Which height is measured by the radio altimeter

A

Height above the ground

55
Q

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

A

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

56
Q

What is the purpose of fans

A

To improve aircraft comms, nav and ATC surveillance

57
Q

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

A

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

58
Q

Where are the engine instruments located on the flight deck

A

They are located in the center instrument panel

59
Q

Why is an over speed warning system fitted

A

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

60
Q

When can the autopilot control the speed of the aircraft

A

During cruise

61
Q

Yaw damper deflects in which direction

A

The opposite direction of the yaw motion

62
Q

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

A

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

63
Q

Which method is used to disconnect the auto throttle system

A

Pushing either throttle lever disconnect push button

64
Q

What functions does the audio selector panel provide

A

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

65
Q

How is the battery of the portable emergency locator transmitter activated

A

Automatically when it comes into contact with water

66
Q

How can the accurate position be determined using GPS

A

By using ground based radio stations to measure the aircraft position

67
Q

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

A

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

68
Q

Why are there two static ports for each static pressure system

A

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

69
Q

The Underwater Locating Beacon (ULB) is activated

A

By water entering the ULB and automatically switching it on

70
Q

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

A

The stall warning system

71
Q

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

A

The rudder must be moved to the left

72
Q

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

A

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

73
Q

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

A

Thrust mode (N1 or EPR)

74
Q

What does the inner loop of an auto pilot control

A

It controls the attitude of the aircraft and is always active

75
Q

Why are RF lines used

A

To transport a radio signal without disturbances

76
Q

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

A

Automatically when it comes into contact with water

77
Q

Why are static discharges fitted to an aircraft

A

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

78
Q

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

A

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

79
Q

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

A

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

80
Q

What is a Flight Director used for

A

It assists the pilot to fly the aircraft manually

81
Q

Which statement is true for VHF 1

A

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

82
Q

What is automatic VOR

A

The bearing is automatically indicated on the RMI or ND

83
Q

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

A
  1. Cockpit crew
  2. Cabin crew
  3. Pre recorded announcements
  4. Boarding music
84
Q

What is the code 7700 used for

A

Code 7700 is an emergency code

85
Q

Where is the weather radar scanner located

A

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

86
Q

Which of the following statements are true for a differential GPS

A

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

Mod 11 (21 decks)

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