INSTRUMENTS / AVIONICS SYSTEMS 11.5.2

Question 1

When are autopilot upper modes available?

Answer 1

When the autopilot is engaged to the CMD (command)

Question 2

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

Answer 2

When a steady elevator deflection is required to maintain a steady pitch attitude

Question 3

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

Answer 3

Max. Continuous Thrust (MCT)

Question 4

What does the autopilot engage interlock monitor?

Answer 4

It monitors all signals the AP needs for the inner loop in CMD and CWS

Question 5

Which auto throttle controlling mode is used during cruise?

Answer 5

The auto throttle uses the speed mode and controls either a selected or FMC calculated speed or Mach number

Question 6

Why is an antenna coupler used on a HF communication system?

Answer 6

To make sure the pat the antenna length is electronically matched to the frequency in use

Question 7

Which statement correctly represents the relationship of frequency and antenna size?

Answer 7

The higher the frequency, the shorter the antenna

Question 8

Which statement is true for ACARS?

Answer 8

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

Question 9

What does the cockpit voice recorder (CVR) record?

Answer 9

Captain, F/O, and 3rd crew member audio signals and the audio from the area microphone

Question 10

Why are static dischargers fitted to an aircraft?

Answer 10

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

Question 11

Where is the weather radar scanner located?

Answer 11

Under the nose radome and transmits the radar beam in a 180° sweep in front of the aircraft

Question 12

What is the purpose of the 2 antennas fitted in an ADF system?

Answer 12

2 antenna signals are required to determine the correct direction

Question 13

What do the different colours indicate on the weather radar screen?

Answer 13

Red- worst weather conditions
Yellow & green- less severe conditions

Question 14

What is automatic VOR?

Answer 14

The bearing is automatically indicated on the RMI OR ND

Question 15

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 cockpit indications do you get? (Venturi effect decreases cabin pressure)

Answer 15

Air Speed Indication (ASI)
Altimeter shows slightly increasing values
VSI shows correct data

Question 16

Why is a band pass filter fitted in the yaw damper computer?

Answer 16

To filter out any steady state signal

Question 17

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

Answer 17

Thrust mode

Question 18

How can a heading on the control panel be selected?

Answer 18

By using heading select

Question 19

Why are radio frequency (RF) lines used?

Answer 19

To transport a radio signal without disturbances

Question 20

What is the service inter-phone used for?

Answer 20

To communicate with maintenance via jacks around the aircraft

Question 21

What is the frequency 121.5 MHz used for?

Answer 21

VHF emergency transmissions

Question 22

Which method is used by the ILS receiver to determine which marker beacon the aircraft is flying over?

Answer 22

Each beacon has its own characteristic modulation and morse code

Question 23

How does DME measure distance?

Answer 23

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

Question 24

What is the purpose of the TA setting on the TCAS control panel?

Answer 24

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

Question 25

What is the purpose of FANS?

Answer 25

To improve the aircraft communication, navigation, and ATC surveillance

Question 26

What is a flight director used for?

Answer 26

It assists the pilot to fly the aircraft manually

Question 27

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

Answer 27

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

Question 28

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

Answer 28

The throttle lever can only be moved with an increased force, auto throttle remains engaged

Question 29

When can the auto pilot control the speed of the aircraft?

Answer 29

During descent

Question 30

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

Answer 30

1. Cockpit crew
2. Cabin crew
3. Pre-Recorded announcement
4. Boarding music

Question 31

What is the service inter-phone used for?

Answer 31

To communicate with maintenance via jacks around the aircraft

Question 32

Which frequencies does the portable Emergency Locator Transmitter (ELT) transmit on?

Answer 32

121.5 MHz
243 MHz
406 MHz

Question 33

How can the ELT be activated?

Answer 33

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

Question 34

What is the frequency of a wave length of 20m?

Answer 34

15 MHz

Question 35

Which statement is correct about TCAS?

Answer 35

TCAS detects other traffic if they have active transponders (page 221)

Question 36

What is the maximum height indicated on a radio altimeter?

Answer 36

2,500ft

Question 37

Which height is measured by the radio altimeter?

Answer 37

Height above ground

Question 38

What is a flight director used for?

Answer 38

Assists pilot to fly manually
Calculates all necessary data for safe and economic flight
Controls flight automatically by deflecting the flight control surfaces

Question 39

What is required to create a lateral flight plan in the FMC (Flight Monitoring Computer)

Answer 39

The lateral flight plan must be loaded before each flight using data loader

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

The pilot must enter each way point manually