2.UD5_2016

1. 11- Which of these facts doesn’t attenuate the radar power?

   1. Aa) Water vapor and oxigen
   2. Bb) Difraction
   3. Cc) Reflection
   4. Dd) Speed of theaircraft
2. 22- Which of these can cause clutter?

   1. Aa) Ground
   2. Bb) Sea
   3. Cc) Rain
   4. Dd) All oftheabove
3. 33- What affects the Radar Cross Section (RCS)?

   1. Aa) Geometriccross-section
   2. Bb) Directivity
   3. Cc) Reflectivity
   4. Dd) All of theabove
4. 44- Which of these are techniques of improvement of detection?

   1. Aa) Product of pulses
   2. Bb) Integration of pulses
   3. Cc) Derivation of pulses
   4. Dd) Negative pulses
5. 55- Where is higher the attenuation?

   1. Aa) At low latitudes
   2. Bb) At high latitudes
   3. Cc) At sea level
   4. Dd) At higher altitudes
6. 66- Which of these do not reduce RCS?

   1. Aa) Blendedwings and fuselage
   2. Bb) Swept leading edge
   3. Cc) A high-profile cockpit
   4. Dd) Internal weapons carriage
7. 77- What do you have to do to be undetectable?

   1. Aa) Staybellowthethreshold in order to be confusedwiththenoise
   2. Bb) Stayabovethethreshold in order to be marginal
   3. Cc) Stay in thethreshold
   4. Dd) None of theabove
8. 81- Which is not a primary surveillance radar:

   1. Aa)ARSR
   2. Bb)TAR
   3. Cc)ASR
   4. Dd) SSR
9. 92- The secondary surveillance radar gives information about:

   1. Aa) Distance, velocity, altitude and azimuth of an aircraft
   2. Bb) Terrain information
   3. Cc) Meteorological information
   4. Dd) Collision risks
10. 103- The preferred and most used target tracking is:

    1. AA) Monopulse
    2. BB) Multipulse
    3. CC) Bipulse
    4. DD) None of the above

11. 114-What is the main objective of Precision approach radars (PAR)?

    1. Aa) Give meteorological information
    2. Bb) Guide an aircraft during final approach and landing
    3. Cc) Give information of enemy targets
    4. Dd) Obtain information about terrain
12. 125-Range gating

    1. Aa) tracks the target when the range increases or decreases
    2. Bb) does not use range of the wave
    3. Cc) uses frequency to detect other aircraft
    4. Dd) none of the above
13. 136- Which is not a function of the airborne weather radar

    1. Aa) indicate weather ahead of the plane
    2. Bb) determine location and height of clouds
    3. Cc) assist the pilot to avoid turbulent clouds
    4. Dd) determine other aircraft
14. 147- Controlling the tilt of an antenna permits the pilot to:

    1. Aa) Reduce the consumption of energy
    2. Bb) Obtain valuable information of thunderstorms
    3. Cc) The position of the antenna is fixed and cannot be moved
    4. Dd) Obtain weather information 360º around the airplane
15. 15• How many satellites compose the constellation of GPS around the Earth? (Diap 13)

    1. A4
    2. B20
    3. C5
    4. D24
16. 16• What are the areas where the 5th satellite may be not visible? (Diap 14)

    1. A• Lower latitudes
    2. B• Equator
    3. C• Higher latitudes
    4. D• The 5th satellite is visible anywhere on Earth
17. 17• Which is a type of GPS receiver? (diap 16)

    1. A• Stand-alone GPS receiver
    2. B• GPS receiver integrated
    3. C• Twin GPS receiver
    4. D• A and B are correct
18. 18• Differential GPS… (diap 18)

    1. A• Uses techniques in order to reduce the satellite ranging error
    2. B• The correction is achieved by a station located on the ground
    3. C• WAAS and LAAS are types of Satellite Based Augmentation Systems
    4. D• All above are correct
19. 19• About Satellite Based Augmentation Systems…(diap 22)

    1. A• WAAS improves the GPS accuracy to around 7m
    2. B• LAAS improves the GPS accuracy to about 1m
    3. C• LAAS is intended to complement WAAS but at a local level
    4. D• All above are correct
20. 20• Which is an autonomous navigation system (any ground station needed)?

    1. A• GPS
    2. B• Inertials (inertial platform)
    3. C• VOR
    4. D• A and B are correct
21. 21• Which is not a GNSS system?

    1. A• GPS
    2. B• Bearing
    3. C• Galileo
    4. D• Glonass
22. 221. Which one is not a radiogoniometer?

    1. Aa) VDF
    2. Bb) ADF
    3. Cc) RDF
    4. Dd) TDF
23. 232. According to the VHF direction finder (VDF), factors affecting Range and Accuracy (Choose the false one):

    1. Aa)Propagation errors over irregular terrains
    2. Bb) Multipath signals
    3. Cc) Overhead errors
    4. Dd)Super-refraction of VHF waves
24. 243. A VORTAC navigation system is:

    1. Aa) A VOR+TACAN system
    2. Bb) The TACAN system is only for military aircrafts (not for civilians).
    3. Cc) Both are correct
    4. Dd) Both are false
25. 254. Frequency range of the VOR (choose the false) :

    1. Aa) 108- 117.95 MHZ
    2. Bb) ILS frequencies are in a different range
    3. Cc) First decimal of the VOR is even number
    4. Dd) First decimal of ILS is odd number
26. 265. DME provides:

    1. Aa) 252 channels X
    2. Bb) 252 channels Y
    3. Cc) 126 Channels X and 126 channels Y
    4. Dd) Non of them
27. 276. DME (choose the false one):

    1. Aa) About 200 NM of range
    2. Bb) Jittering is used to discrimínate between aircrafts trying to communicate with the same DME.
    3. Cc) Two codings for channels are used
    4. Dd) 252 channels of each channel

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Quiz sobre 2.UD5_2016, criado por David Nunez em 26-05-2018.

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