Vayudoot Aviation

1. Which of the following, if any, is a prerequisite if a receiver of a NAVSTAR/GPS satellite navigation system is to be used in combination with a multi sensor system?

The prescribed IFR-equipment must be installed and operational

Multi-sensor systems are not certificated for flights under IFR conditions

The RAIM-function of the GPS receiver must be able to monitor all prescribed navigation systems

The prescribed IFR-equipment must be in working correctly and the navigation information continuously displayed

2. An NDB transmits a signal pattern in the horizontal plane which is

bi-lobal circular

a beam rotating at 30 Hz

omnidirectional

a cardioid balanced at 30 Hz

3. In order to indicate an emergency situation, the aircraft Secondary Surveillance Radar (SSR) transponder should be set to

7700

7000

7600

7500

4. In weather radar the use of a cosecant beam in 'Mapping' mode enables

higher definition echoes to be produced giving a clearer picture

scanning of a large ground zone producing echos whose signals are practically independent of distance

better reception of echos on contrasting terrain such as ground to sea

a greater radar range to be achieved

5. One of the tasks of the space segment of the satellite navigation system NAVSTAR/ GPS is to

transmit signals which can be used, by suitable receivers, to determine time, position and velocity

monitor the satellites' orbits and status

transmit signals to suitable receivers and to monitor the orbital planes autonomously

compute the user position from the received user messages and to transmit the computed position back to the user segment

6. During a flight at FL 210, a pilot does not receive any DME distance indication from a DME station located approximately 220 NM away.The reason for this is that the

range of a DME system is always less than 200 NM

altitude is too high

aeroplane is below the 'line of sight' altitude

aeroplane is circling around the station

7. What is the approximate maximum theoretical range at which an aircraft at FL130 could receive information from a VDF facility which is sited 1024 FT above MSL?

220 NM

150 NM

180 NM

120 NM

8. In the event of the use of Selective Availability, how does this affect, if at all, the navigation accuracy of the NAVSTAR/GPS satellite navigation system ?

It has no influence because, by selecting of the most suitable signals, the computing process in the receiver is quicker

It degrades accuracy by reducing the number of available satellites

It increases because only signals from satellites in the most suitable geometric constellation are selected by the receiver

It degrades position accuracy by manipulating satellite signals

9. In which frequency band does the Microwave Landing System (MLS) operate?

UHF

VHF

EHF

SHF

10. What is the maximum number of usable Secondary Surveillance Radar (SSR) transponder codes?

1000

4096

3600

760

11. What is the maximum distance between VOR and DME/TACAN ground installations if they are to have the same morse code identifier?

60 m

2000 m

300 m

600 m

12. An RMI indicates aircraft heading. To convert the RMI bearings of NDBs and VORs to true bearings the correct combination for the application of magnetic variation is

NDB: beacon positionVOR: beacon position

NDB: beacon positionVOR: aircraft position

NDB: aircraft positionVOR: beacon position

NDB: aircraft positionVOR: aircraft position

13. The Doppler Navigation System is based on

radar principles using frequency shift

doppler VOR (DVOR) Navigation System

phase comparison from ground station transmissions

radio waves refraction in the ionosphere

14. In civil aviation, the height value computed by the receiver of the satellite navigation system NAVSTAR/GPS is the

geometric height above ground

flight level

height above the WGS-84 ellipsoid

height above Mean Sea Level (MSL)

15. The DME (Distance Measuring Equipment) operates within the following frequencies

329 to 335 MHz

108 to 118 MHz

962 to 1213 MHz

962 to 1213 kHz.

16. An aircraft at 6400 FT will be able to receive a VOR groundstation at 100 FT above MSL at an approximate maximum range of

90 NM

110 NM

100 NM

120 NM

17. Which of the following procedures must be adopted if, on a flight under IFR conditions using a NAVSTAR/GPS satellite navigation system receiver, the position fix obtained from the GPS receiver differs from the position of conventional navigation systems by an unacceptable amount?

The pilot must determine the reason for the deviation and correct the error or switch off the faulty system

It may be continued using NAVSTAR/GPS, prior to the next flight all systems must be checked

It must be continued under VFR conditions

It may be continued using conventional navigation systems

18. The selection of code 7600 on an aircraft SSR transponder indicates

transponder malfunction

an emergency

radio communication failure

unlawful interference with the planned operation of the flight

19. Which of the following NAVSTAR/GPS satellite navigation system codes can be processed by 'unauthorised' civil aviation receivers?

C/A

P and Y

P

C/A- and P

20. A radar facility transmitting at a Pulse Recurrence Frequency (PRF) of 1200 pulses/second will have a maximum unambiguous range of approximately

69 NM

27 NM

270 NM

135 NM

21. Which of the following is the ICAO allocated frequency band for ADF receivers?

200 - 1750 kHz

300 - 3000 kHz

200 - 2000 kHz

255 - 455 kHz

22. In the MAPPING MODE the airborne weather radar utilises a

pencil beam to a maximum range of 60 NM

fan shaped beam effective up to a maximum of 50 NM to 60 NM range

pencil beam effective from zero to 150 NM

fan shaped beam effective up to a range of 150 NM

23. The VOR system is limited to about 1° of accuracy. One degree at 200 NM represents a width of

3.0 NM

3.5 NM

2.5 NM

2.0 NM

24. The rate of descent required to maintain a 3.25° glide slope at a groundspeed of 140 kt is approximately

850 FT/MIN

670 FT/MIN

800 FT/MIN

700 FT/MIN

25. Signal reception is required from a minimum number of satellites that have adequate elevation and suitable geometry in order for a Satellite-Assisted Navigation System (GPS) to carry out independent three dimensional operation without the Receiver Autonomous Integrity Monitoring (RAIM) function. The number of satellites is

4

5

6

3

26. Quadrantal errors associated with aircraft Automatic Direction Finding (ADF) equipment are caused by

signal bending by the aircraft metallic surfaces

skywave/groundwave contamination

misalignment of the loop aerial

signal bending caused by electrical interference from aircraft wiring

27. Radar returns, on a B737-400, can be displayed on all Electronic Horizontal Situation Indicator (EHSI) screen modes of an Electronic Flight Instrument System (EFIS) WITH THE EXCEPTION OF

FULL VOR/ILS, EXP VOR/ILS and PLAN

FULL NAV, FULL VOR/ILS and PLAN

EXP VOR/ ILS, PLAN and MAP

FULL NAV, PLAN and MAP

28. The principle used in VOR bearing measurement is:phase comparison

phase comparison

envelope matching

difference in depth of modulation

beat frequency discrimination

29. How does the Electronic Flight Instrument System display of a B737-400 respond to the failure of a VHF navigation (VOR) receiver?

Inertial Reference SystemsAircraft Mapping RadarNavigation radios

Inertial Reference SystemsNavigation radiosTrue airspeed and drift inputs

Flight Management ComputerAircraft Mapping RadarNavigation radios

Navigation radiosFlight Management ComputerInertial Reference Systems

30. The minimum range of a primary radar, using the pulse technique, is determined by the (i)........ , the maximum unambiguous range by the (ii).........

(i) transmission frequency (ii) transmitter power output

(i) transmission frequency (ii) pulse recurrence frequency

(i) pulse length (ii) length of the timebase

(i) pulse length (ii) pulse recurrence frequency

31. The required 24 NAVSTAR/GPS operational satellites are located on

3 orbital planes with 8 satellites in each plane

4 orbital planes with 6 satellites in each plane

6 orbital planes with 4 satellites in each plane

6 orbital planes with 3 satellites in each plane plus 6 reserve satellites positioned in a geostationary orbital plane

32. What is the procedure to be followed if, on a flight under IFR conditions using the NAVSTAR/GPS satellite navigation system, the number of satellites required to maintain the RAIM (Receiver Autonomous Integrity Monitoring) function are not available?

The flight may be continued using other certificated navigation systems

A constant heading and speed must be flown until the required number of satellites are again available

The flight may be continued as planned if at least 4 satellites are available and the pilot monitors the GPS-System manually

The flight has to be continued under VFR conditions

33. An aircraft on a heading of 280°(M) is on a bearing of 090°(M) from a VOR. The bearing you should select on the OMNI bearing selector to centralise the VOR/ILS left/right deviation needle with a 'TO' indication is

090°

100°

280°

270°

34. In which of the following cases would ETOs and ETA at destination calculated by the Flight Management Computer (FMC) be correct?

When the ETOs and ETA are based on the forecast winds calculated from the actual takeoff time

When the FMC positions and GS are accurate

When the FMC computes each ETO and ETA using the correct GS

When the actual winds match the forecast winds, and the actual cruising Mach number is equal to the FMC calculated Mach number

35. Where, in relation to the runway, is the ILS localiser transmitting aerial normally situated?

At the non-approach end about 150 m to one side of the runway and 300 m along the extended centreline

At the approach end about 150 m to one side of the runway and 300 m from touchdown

At the approach end of the runway about 300 m from touchdown on the centreline

On the non-approach end of the runway about 300 m from the runway on the extended centreline

36. The frequency of an SSR ground transmission is

1090 +/- 0.3 Mhz

1030 +/- 0.2 Mhz

1120 +/- 0.6 Mhz

1050 +/- 0.5 Mhz

37. The design requirements for DME stipulate that, at a range of 100 NM, the maximum systematic error should not exceed

+ or - 0.25 NM

+ or - 1.25 NM

+ or - 3 NM

+ or - 1.5 NM

38. The track-line on the Electronic Horizontal Situation Indicator (EHSI) or Navigation Display of an Electronic Flight Instrument System

indicates to the pilot that a manually selected heading is being flown

represents the track of the aircraft over the ground. When it co-incides with the desired track, wind influence is compensated for

indicates that the pilot has made a manual track selection

corresponds to the calculated IRS TH and is correct during turns

39. Transmissions from VOR facilities may be adversely affected by

night effect

static interference

uneven propagation over irregular ground surfaces

quadrantal error

40. In an Airborne Weather Radar that has a colour cathode ray tube (CRT) the areas of greatest turbulence are indicated on the screen by

iso-echo areas which are coloured black

large areas of flashing red colour

blank iso-echo areas where there is no colour

colour zones being closest together

41. In order to indicate unlawful interference with the planned operation of the flight, the aircraft Secondary Surveillance Radar (SSR) transponder should be selected to

7000

7500

7600

7700

42. Which of the following is the datum for altitude information when conducting flights under IFR conditions on airways using the NAVSTAR/GPS satellite navigation system?

The average of GPS altitude and barometric altitude

GPS altitude

Barometric altitude

GPS altitude if 4 or more satellites are received otherwise barometric altitude

43. A VOR is sited at position A (45°00'N, 010°00'E). An aircraft is located at position B (44°00'N, 010°00'E). Assuming that the magnetic variation at A is 10°W and at B is 15°W, the aircraft is on VOR radial

185°

180°

190°

195°

44. The outer marker of an ILS with a 3° glide slope is located 4.6 NM from the threshold. Assuming a glide slope height of 50 FT above the threshold, the approximate height of an aircraft passing the outer marker is

1450 FT

1300 FT

1400 FT

1350 FT

45. Under JAR-25 colour code rules features displayed in cyan/blue, on an Electronic Flight Instrument Systems (EFIS), indicate

engaged modes

the sky

the flight director bar(s)

flight envelope and system limits

46. What is the deviation per dot on the HSI when using a 2-dot basic RNAV system in the en-route mode?

10 NM

2 NM

5 NM

1 NM

47. Which of the following frequency-bands is used by the Loran C navigation system?

1750 - 1950 kHz

10.2 - 13.6 kHz

978 - 1213 MHz

90 - 110 kHz

48. In relation to radar systems that use pulse technology, the term 'Pulse Recurrence Rate (PRR)' signifies the

the number of cycles per second

delay after which the process re-starts

number of pulses per second

ratio of pulse period to pulse width

49. Why is a secondary radar display screen free of storm clutter?

The frequencies employed are too high to give returns from moisture sources

The frequencies employed are too low to give returns from moisture sources

The principle of 'echo' return is not used in secondary radar

A moving target indicator facility suppresses the display of static or near static returns

50. On a DME, display counters rotating throughout their range indicates

airborne equipment failure

ground equipment failure

the airborne receiver is conducting a range search

the airborne equipment is conducting a frequency search

Question Bank

Questions for INDIGO RADIO NAVIGATION