Vayudoot Aviation

1. The availability of 4096 codes in SSR is applicable to mode

All

C

A

S

2. A category III ILS system provides accurate guidance down to

less than 200 ft

less than 50 ft

the surface of the runway

less than 100 ft

3. In a primary pulsed radar the ability to discriminate in azimuth is a factor of

Pulse recurrence rate

Pulse width

Beamwidth

Rate of rotation

4. What are the ground components of MLS?

combined azimuth and elevation antennae with middle and outer markers

separate azimuth and elevation antennae with DME

separate azimuth and elevation antennae with middle and outer markers

combined azimuth and elevation antennae with DME

5. In NAVSTAR/GPS the PRN codes are used to

remove receiver clock error

determine satellite range

reduce ionospheric and tropospheric errors

eliminate satellite clock and ephemeris errors

6. The frequency band of MLS is

SHF

VHF

UHF

VLF

7. RAIM is achieved

within the receiver

by ground monitoring stations determining the satellite range errors which are relayed to receivers via geo-stationary satellites

any of the above

by ground stations determining the X, Y & Z errors and passing the corrections to receivers using pseudolites

8. According to ICAO (Annex 11), the definition of an RNAV system is

one which enables the aircraft to navigate on any desired flight path within the specified limits of self contained on-board systems.

one which enables the aircraft to navigate on any desired flight path within the coverage of appropriate ground based navigation aids or within the specified limits of self contained on-board systems but not a combination of the two

one which enables the aircraft to navigate on any desired flight path within the coverage of appropriate ground based navigation aids or within the specified limits of self contained on-board systems or a combination of the two

one which enables the aircraft to navigate on any desired flight path within the coverage of appropriate ground based navigation aids only

9. The principle of operation of LORAN C is

differential range by pulse technique

range by phase comparison

range by pulse technique

differential range by phase comparison

10. The distance measured between a satellite and a receiver is known as a pseudo-range because

satellite and receiver are continually moving in relation to each other

it is measured against idealised Keplerian orbits

it is measured using pseudo-random codes

it includes receiver clock error

11. The MDA for a non-precision approach using NAVSTAR/GPS is based on

GPS altitude

GPS or barometric altitude

radio altimeter

barometric altitude

12. In NAVSTAR/GPS the PRN codes are used to

differentiate between satellites

pass satellite time and ephemeris information

pass satellite time, ephemeris and other information

pass satellite ephemeris information

13. Which of the following may cause inaccuracies in ADF bearings?

coastal refraction, slant range, night effect

lack of failure warning, station interference, static interference

static interference, height effect, lack of failure warning

station interference, mountain effect, selective availability

14. Using a 5 dot CDI, how many dots would show for an aircraft on the edge of an airway at 100 nm from the VOR beacon?

1.5

2.5

3

5

15. An aircraft at FL360 is 10 nm plan range from a DME. The DME reading in the aircraft will be

13.6nm

10nm

8nm

11.7nm

16. The colour recommended in JAR25 for armed modes is

yellow

magenta

white

green

17. The NAVSTAR/GPS segments are

space, control, user

space, control, ground

space, control, air

space, ground, air

18. The best accuracy from satellite systems will be provided by

GLONASS and COSPAS/SARSAT

NAVSTAR/GPS and GLONASS

NAVSTAR/GPS and TNSS transit

GLONASS and TNSS transit

19. How is the distance between the NAVSTAR/GPS SV and the receiver determined?

by synchronising the receiver clock with the SV clock

by measuring the time from transmission to reception and multiplying by the speed of light

by measuring the time from transmission to reception and dividing by the speed of light

by referencing the SV and receiver positions to WGS84

20. Which axes is the AWR stabilised in?

Pitch, roll and yaw

Pitch only

Pitch and roll

Roll and yaw

21. The most accurate measurement of speed by DME for an aircraft at 30000 ft will be when the aircraft is

passing abeam the beacon at 5 nm

tracking towards the beacon at 10 nm

overhead the beacon

tracking away from the beacon at 100 nm

22. On the B737-400 EHSI what happens if the selected VOR fails?

the display flashes

a fail flag is displayed alongside the display bar

the deviation bar is removed

the display blanks and a fail warning appears

23. The JAR25 recommended colour for an off-route waypoint is

green

magenta

cyan

white

24. According to JAR25, for what type of message is the colour red used?

warnings, cautions, abnormal sources

flight envelope, system limits, engaged mode

cautions, abnormal sources, engaged mode

warnings, flight envelope, system limits

25. The preferred GNSS receiver for airborne application is

multi-channel

fast multiplex

sequential

multiplex

26. The JAR25 colour recommended for the display of current data is

yellow

white

magenta

red

27. The middle marker is usually located at a range of ……, with an audio frequency of …… and illuminates the …… light

1 km, 400 Hz, amber

4-6 nm, 1300 Hz, white

1 km, 400 Hz, white

1 km, 1300 Hz, amber

28. The phantom station in a 2D RNAV system may be generated by

VOR/DME

Any of the above

Twin VOR

Twin DME

29. In a certain VORTAC installation the VOR is coding STN and the DME is coding STZ. This means that the distance between the two beacons is in excess of

100m

300m

600m

2000m

30.
Refer to diagram E of Appendix A. The track from ZAPPO to BURDY is

205°(M)

064°(T)

064°(M)

205°(T)

31. The JAR25 recommended colour for the aircraft symbol is

green

cyan

magenta

white

32. The AWR can be used on the ground provided: i. the aircraft is clear of personnel, buildings and vehicles ii. conical beam is selected iii. maximum uptilt is selected iv. the AWR must never be operated on the ground

ii and iii

i and iii

i, ii and iii

iv

33. What equipment does an aircraft need when carrying out a VDF letdown?

VHF radio

VOR/DME

VOR

None

34. What is an ADC input to the FMC?

TAS

Heading

Groundspeed and drift

VOR/DME position

35. The inputs the pilot will make to the FMC during the pre-flight initialisation will include

Navigation data base, aircraft position and departure aerodrome

Departure runway, planned route and ETD.

ETD, aircraft position, and planned route

Planned route, aircraft position, and departure runway

36. At a range of 200 nm from a VOR, if there is an error of 1°, how far off the centreline is the aircraft?

1 nm

7 nm

1.75 nm

3.5 nm

37. With the AWR set at 100 nm range a large cloud appears at 50 nm. If the range is reduced to 50 nm

the image will increase in area and move to the top of the screen

the image will increase in area and move to the bottom of the screen

the image will decrease in area and move to the top of the screen

the image will decrease in area and remain where it is

38. The height of the GPS constellation is

20200 km

35800 km

10900 km

19300 km

39. The required accuracy of a precision RNAV (P-RNAV) system is

1.5 nm standard deviation or better

1 nm standard deviation or better

0.25 nm standard deviation or better

0.5 nm standard deviation or better

40. The orbital height of geostationary satellites is

35800 km

19330 km

10313 nm

10898 nm

41. In NAVSTAR/GPS the space segment

sends information for receiver to determine latitude, longitude and time

Provides the positional information to the receiver

the receiver interrogates the satellite and the satellite provides positional information

relays positional data from the control segment

42. The contents of the navigation and systems message from NAVSTAR/GPS SVs include

ionospheric propagation information, X, Y & Z co-ordinates and corrections, satellite clock time and error

satellite clock error, almanac data, ionospheric propagation information

satellite clock error, almanac data, satellite position error

position accuracy verification, satellite clock time and clock error

43. The function of the receiver in the GNSS user segment is to

interrogate the satellites to determine range

track the satellites to calculate time

track the satellites to calculate range

determine position and assess the accuracy of that position

44. With reference to SSR, what code is used to indicate transponder altitude failure?

7600

0000

9999

4096

45. Which of the following statements regarding VHF direction finding (VDF) is most accurate?

it uses line of sight propagation

it is simple requiring only VHF radios on the ground and in the aircraft

it is simple and only requires a VHF radio on the ground

It is simple and requires a VHF radio and DF equipment in the aircraft

46. Which of the following is the most significant error in ADF?

coastal refraction

static from Cb

precipitation static

quadrantal error

47. A radio beacon has a range of 10 nm. By what factor should the power be increased to achieve a range of 20 nm?

8

4

16

2

48. When using GPS to fly airways, what is the vertical reference used?

average of barometric and GPS

radio altitude

GPS height

barometric

49. The best radar for measuring very short ranges is

a pulsed secondary radar

a pulsed primary radar

a continuous wave secondary radar

a continuous wave primary radar

50. Why is a secondary radar display free from weather clutter?

moving target indication is used to suppress the static generated by water droplets

the principle of the return of echoes is not used

the frequencies are too low to detect water droplets

the frequencies are too high to detect water droplets

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