UHF goes from
3-30 KHz
30-300 KHz
300MHz-3 GHz
30-300 GHz
A disadvantage of the HF waves
Beyond LOS
Long range (oceanic crossing)
Interferences
Only in modern A/C
Preguntad a Flores!
SELCAL
Means selective calibration
Increases CRM loads
Comprises two consecutive tone pulses
Causes interferences with the radio
HFDL disadvantage
Wide coverage
Simultaneous coverage on several bands
Simple avionics and scarce reliability
None of the above
VHF communications
From 118.00-137 MHz
Great radio interference
Reaches far behind LOS
Distress frequency 122.5
VDL
Long range A/C only have 1 piece of VHF equipment
ACARS data link is also known as airline operational control
Downlink (from aircraft) and Uplink (to aircraft) are plain HTML text
Increase the VHF and HF voice comms.
SATCOMs
Use EUROSAT satellite constellation
Range C- band and L-band
Only need 1 satellite
Types of transponders
DME
IFF
TACAN
All of the above
In transponder Mode A which is the Pulse Repetition Frequency:
Pulse Repetition Frequency (PRF) = 1200 interrogation signals per second
Pulse Repetition Frequency (PRF) = 1000 interrogation signals per second
Pulse Repetition Frequency (PRF) = 1350 interrogation signals per second
Pulse Repetition Frequency (PRF) = 1100 interrogation signals per second
Reception - SLS = Side-lobe suppression.
An aircraft not within the main lobe of the directional beam would receive a P4>P1/P3 The transponder recognises this as a side-lobe signal.
An aircraft not within the main lobe of the directional beam would receive a P2>P1/P3 The transponder recognises this as a side-lobe signal.
An aircraft not within the main lobe of the directional beam would receive a P4>P1/P3 The transponder recognises this as a front-lobe signal.
None of the above is correct.
¿Which is the difference between Mode A and Mode C transponder modes, talking about reception and interrogation?
A. The number of pulses.
B. The time between pulses
C. A and B.
D. There is no difference.
What is the AA (Aircraft Adress):
24-bit code unique for each aircraft, established by the authorities when registering a flight plan
24-bit code unique for each aircraft, given by the control when leaving the CTR.
24-bit code unique for each aircraft, allocated to it by ICAO via the individual national registration authorities.
24-bit code unique for each aircraft, which is regulated on ground by the maintenance team.
How many levels transponder MODE S has?
Level 1, 2, 3 and 4
Level 1 and 2
It hasn`t any level
It has only one level
The main features of the ADS are…?
Automatic and independent.
Automatic and dependent
Manual and independent
Manual and dependent
Which is an advantage of the ADS?
90% cost saving in maintenance
Real time data
No in-ground equipment
The most used DATA LINK software are LINK 11 & 16
True
False
About Flight Director System (FDS), what question is correct?
A. This system computes the pitch and roll commands
B. FDS do A to achieve or maintain a particular condition of flight.
C. The commands are then applied automatically by the aircraft.
D. A and B are true
Choose the correct answer
FDS reduces crew workload
FDS has different inputs to control the aircraft
One input is the vertical Gyro/INS/IRS to obtain pitch and roll attitude
All of the above are correct
Choose the best option related with FDS modes.
FDS have the next options: OFF, lateral modes, vertical modes, and special modes
FDS have the next options: STBY, horizontal modes, vertical modes, and space modes
FDS have the next options: STBY, lateral modes, vertical modes, and diagonal modes
Which are part of the special modes?
T/O an G/A
APP (GS)
Vertical SYNC
What of the following sentences are correct?
A. An Automatic Flight Control System (AFCS) is a system that provides a mean to stabilize, maneouver and control automatically an aircraft flight path.
B. AFCS functions are: Stability and control augmentation, attitude hold, and flight control.
C. A and B are true
D. A and B are false.
What does AFCS mean?
Automatic Flight Control System
Automatic Fuel Control System
Autonomous Flight Control Surveillance
Autonomous Fire Control Surveillance
Related with AFCS closed loop control:
A. It can be named Inner Loop control too.
B. From an error signal, a signal is generated to act in the way of correcting the error.
Related with AFCS open loop control:
A. From an input the attitude of the trimmed aircraft is modified in order to perfom a maneouver.
Q1. Which it is not an advantage of HF(high frequency)
Communications beyond line of sight
Long Range communications between air and ground
Provide communication through long range (oceanic crossing)
It is not affected by interferences
Q2. What is SATCOMs?
Structural airspace transoceanic compliments
SATELLITE COMMUNICATIONS that use International Maritime Satellite Organization (INMARSAT) satellite constellation.
SATELLITE COMUNICATIONS that helps the GPS constellation if calibration is needed.
All are false
Q3. The different modes of transponder are:
Mode A, SSR systems confirms the aircraft’s azimuth on the controller’s screen with an icon confirming that the aircraft is equipped with a transponder.
Mode C, Pressure altitude is given (with azimuth it provides 3D info).
Mode S (select), Includes data linking capability to provide a cooperative surveillance and communication system.
All are true
Q4. What is a BUS in aeronautics?
A transport method for reaching planes
Subsystem that permits interconnection and data exchange between the devices in a complex system (central nervous system of the aircraft)
A code that encrypt every data that the plane has to process
The operative system of a plane computer
Q5.Which of the following transponders can we find in military aircrafts?
Distance Measurement Equipment (DME)
Tactical Air Navigation (TACAN)
Identification Friend or Foe (IFF)
Q6. How many phases have the mode S implementation?
3 (ELS, EHS and Additional DAP)
2 (ELS and EHS)
1 (ELS)
4 (ELS, EHS, DAP and ELM)
Q7. What is the meaning of AA in mode S?
Aircraft Address
Air colision
Avoidance altitude
Anticollision attitude
Q8. Which is the basis of the ATC system?
Primary radar
Secondary radar
Both of them