Radio Nav Exam 2

Radio Navigation Exam 2, 65 Questions - time allowed 90 minutes 1.

When ADF equipment which incorporates a sense aerial and a loop aerial is tuned to a NDB and the loop aerial is rotated so that a sharp null is found the aerial is (a) (b) (c) (d)

2.

The AWR transmitter is not normally selected on the ground because: (a) (b) (c) (d)

3.

The weather mode selected. The mapping mode selected. Either of these modes selected. None of these.

If, when you are requesting a QDM from an airfield, you are offered a QGH, it means (a) (b) (c) (d)

5.

It can overload the electrical system. Its radiated energy can damage people and equipment. It can interfere with radars and approach aids. None of the above.

If the AWR transmitter is required to be switched on before take-off the scanner should be tilted up with: (a) (b) (c) (d)

4.

at right angles to the incoming signals in line with the incoming signals either at right angles or in line with the incoming signals aligned with the aircraft nose

The VDF unit is prepared to give you assistance during an approach to the airfield, based on VDF bearings The VDF service will be handled by a different VDF unit, operating on the same frequency The bearing will only be accurate when the aircraft is flying above the QGH level The service will be limited to bearings, no positions will be given by the DF station

Selection of mode C on the SSR provides ATC with information based on: (a) (b) (c) (d)

Aircraft Aircraft Aircraft Aircraft

pressure altitude. altitude as indicated on the captain's altimeter. height above QFE. height above the surface.

Bristol Groundschool

Radio Navigation Exam 2

6.

The SSR conspicuity code is: (a) (b) (c) (d)

7.

A radio signal has a frequency of 3 Ghz. Its wave length is: (a) (b) (c) (d)

8.

10 cm 1.0 cm 100 cm 1.0m

On a 5 dot HSI in the RNAV approach mode (APR RNAV) what does one dot indicate? (a) (b) (c) (d)

9.

7000. 2000. 0033. 4321.

0.25 nm 0.5 nm 1.0 nm 2.0 nm

Using the 1 in 60 rule calculate the height on a 3 degree glide path of an aircraft 4.5 nm from touchdown. (a) (b) (c) (d)

1370 1420 1480 1230

ft ft ft ft

10. An aircraft at FL 250 is using its AWR which has a beam width of 5 degrees. A cloud at 25 nm ceases to paint when the tilt control is selected to 1 degree up. Using the 1 in 60 rule calculate the height of the cloud top. (a) (b) (c) (d) 11.

ft ft ft ft

In radio terms, frequency means: (a) (b) (c) (d)

12.

21200 25000 28800 26000

The The The The

number of complete waveforms passing a spot in one second. length of a complete waveform in metres. speed of radio waves in metres per second. number of waveforms in one hour

A radio wave with a horizontal magnetic component would be best received by a..................aerial (a) (b) (c)

vertical. horizontal parabolic



13.

(d) magnetic The limits of the VHF band are: (a) (b) (c) (d)

14.

3 - 30 MHz. 300 - 3000 KHz. 30 - 300 MHz 300 - 3000 MHz.

Attenuation of a radio wave is the: (a) (b) (c) (d)

change of its amplitude by use of sidebands. change of its frequency by use of sidebands. increase of its power by the combination of multi-path signals. reduction of its power by absorbtion, scattering or spreading.

15. What most affects the range available from a secondary radar? (a) (b) (c) (d) 16.

MF VHF MF MF

greater shorter greater shorter

ground sky ground sky

land sea sea sea

sea. land. land. land

With reference to a VDF bearing, the true bearing of the aircraft from the ground station is a (a) (b) (c) (d)

18.

height of aircraft and height of ground interrogator transmission power of ground transponder transmission power of aircraft interrogator PRP

Complete the following statement. ......... radio signals have a ......... range by .......... wave over .......... than over ........... (a) (b) (c) (d)

17.

The The The The

QDM QDR QUJ QTE

An airborne weather radar in the mapping mode shows an island as on the display on the right. If the aircraft heading is 040°(M) the magnetic bearing and range from the aircraft to the island is: (a) (b) (c) (d)

070° 010° 070° 010°

100 nm 200 nm 240 nm 40 nm



19.

Which of the following factors could cause an error of an ADF bearing of an NDB ? (a) (b) (c) (d)

20.

The purpose of the BFO switch on the ADF receiver is to: (a) (b) (c) (d)

21.

(b) (c) (d)

Phase comparison between an amplitude modulated reference signal and a frequency modulated variable signal. Phase difference between a frequency modulated reference signal and an amplitude modulated variable signal. Phase comparison between a 108 Mhz reference signal and a 30 Hz variable signal. Phase comparison between a 30 Hz reference signal and a 108 Mhz variable signal.

At 5.25 nm from the threshold an aircraft on an ILS approach has a display showing it to be 4 dots low on a 3 degree glidepath. Using an angle of 0.15° per dot of glideslope deviation and the 1 in 60 rule calculate the height of the aircraft from touchdown. (a) (b) (c) (d)

23.

Improve the strength of the received signal Cut out the static noise Make the signal audible Attenuate the received signal

The basic principle of operation of a standard VOR is by: (a)

22.

Phase interference Atmospheric scatter. Scalloping. Night effect.

1375 1325 1280 1450

ft ft ft ft

According to JAA JTSOs the colour red is used on an EFIS screen for: (i) (ii) (iii) (iv)

Warnings Flight envelope and system limits Cautions, abnormal sources Scales and associated figures

Which selection of the above answers is correct? (a) (b) (c) (d)

(i) only (i) & (ii) (i) & (iii) (ii) (iii) & (iv)



24.

The coverage of the ILS localiser at 17 nm is guaranteed up to an angle either side of the extended centreline of: (a) (b) (c) (d)

25.

9 6 9 9

nm nm nm nm

277 089 097 269

radial radial radial radial

± ± ± ±

0.5 nm 1 nm 2 nm 5 nm

The term "Doppler shift" refers to: (a) (b) (c) (d)

30.

074 242 062 254

What is the maximum off-track error permitted on P-RNAV systems? (a) (b) (c) (d)

29.

mapping mode fan shaped beam manual mode contour mode

An aircraft on a heading of 270 (M) has 093 set on the OBS and TO indicated. The VOR Course Deviation Indicator shows 2 dots FLY LEFT. The aircraft is, therefore, situated on the: (a) (b) (c) (d)

28.

The The The The

The Course Deviation Indicator shows 248 TO and 3 dots FLY LEFT. If the DME range is 90 nm your VOR radial and distance from the centre line will be: (a) (b) (c) (d)

27.

degrees degrees degrees degrees

When using the AWR to detect long range ground features the most suitable mode of operation or beam selected would be: (a) (b) (c) (d)

26.

35 25 30 10

The The The The

change change change change

in in in in

phase angle measured at the receiver the speed measured at the receiver depression angle measured at the receiver frequency measured at the receiver

The main factor which affects the maximum range of a pulse radar is: (a) (b) (c)

The frequency of the radar transmission The size of the radar screen The pulse repetition frequency



(d) 31.

If a DME beacon becomes saturated by interrogations it: (a) (b) (c) (d)

32.

(b) (c) (d)

recurrence frequency width rate recurrence period

At or near the coast During the long winter nights At dusk and dawn When flying at low altitude

For a category one ILS glide path of 3.3 degrees the coverage is: (a) (b) (c) (d)

36.

Pulse Pulse Pulse Pulse

When considering the propagation of ADF transmissions night effect is most pronounced; (a) (b) (c) (d)

35.

The relative bearing to the VOR, as observed on the RMI, will jump 20° The number of the received radial may still be read on the compass card under the tail of the VOR needle The magnetic track to the VOR station may be read on the compass card under the tip of the VOR needle All 3 answers are correct

The interval in time between the commencement of two consecutive pulses is: (a) (b) (c) (d)

34.

It switches off its identification signal Adjusts the gain to reply to the 100 strongest signals Adjusts its PRF to cope with all aircraft Replies to the nearest 100 aircraft

If the compass providing information to the RMI suddenly gets a 20° deviation (a)

33.

The aerial system size

1.65 1.49 1.49 1.65

to to to to

5.77 5.94 5.77 5.94

degrees degrees degrees degrees

If a VOR station and a DME station, having different locations, are selected to provide a fix…. (a) (b) (c) (d)

Two sets, with separate frequency control, are required in the aircraft Two positions, being ambiguous, will be presented Two different IDs will have to be checked All 3 answers above are correct



37.

INMARSAT coverage is limited to below 80°N and 80°S because: (a) (b) (c) (d)

38.

The brilliance of a CRT display is adjusted by varying the voltage on the (a) (b) (c) (d)

39.

second anode cathode X plates grid

With regard to the advantages of SSR which of the following statements is correct? (a) (b) (c) (d)

40.

Polar cap absorbtion affects the signals beyond those latitudes the satellite orbits are geostationary the aurora borealis affects the satellite operation the satellites cross the equator at 55° and therefore do not traverse the polar region.

range, bearing and height can be calculated from reply signals No aircraft manoeuvres are necessary for identification Little power is required to effect longish range All of the above

An aircraft is tracking the 065° radial inbound to VOR X. With 12° port drift which of the following indications will be correct when crossing the 133° radial from VOR Y?



41.

What are the primary navigation inputs used by RNAV system? (a) (b) (c) (d)

42.

You are maintaining a track of 315°M on a heading of 299°M. The variation at the aircraft is 12°E. The true heading is ............. the true track is .......... and the drift is .............. (a) (b) (c) (d)

43.

Nav Aids, INS, FMC database INS, Nav Aids, TAS and Drift INS, Mapping Radar, FMC database Nav Aids, Mapping Radar, FMC database

326 287 311 311

311 303 327 327

16° 16° 16° 16°

starboard port starboard port

An aircraft is attempting to track 186°M on an airway defined by a VOR 80nm away. The VOR indicator below indicates the aircraft position. With these indications the aircraft is on the ........... radial and ......... the airway

.. .. . . .. . . . . . .. . TO

186

(a) (b) (c) (d) 44.

181 001 181 001

outside inside inside outside

When a DME interrogates a ground station the prf is (a) (b) (c) (d)

150 pps until locked on 150 pps for 15,000 pulse pairs then reduces to 60 pps until locked on 150 pps for 100 secs then reduces to 60 pps until locked on 24 pps until locked on



45.

An aircraft over the sea is receiving a signal from an NDB 50nm from the coast and another from an NDB 20nm from the coast. Which of the following statements is most correct? (a) (b) (c) (d)

46.

(d)

(d)

from relative bearings of 90° and 270°

Mode S Mode S Mode S facility Mode S

transponders are used to assist GPS positioning transponders are used with TCAS III transponders reduce RT traffic and provide a datalink and Mode C transponders operate on different frequencies

3 4 5 6

Higher frequency for the P code only Higher frequency for the C/A and P codes Higher frequency for the C/A code and lower frequency for the P code Lower frequency for the C/A code and higher frequency for the P code

The height of the GPS Navstar system above the earth in km is: (a) (b) (c) (d)

50.

from relative bearings of 360° and 180°

The GPS Navstar system transmits in the L1 and L2 frequency bands. Which bands are used for the P codes and which for the C/A codes? (a) (b) (c)

49.

from the beacon 20nm inland would be

How many satellites are required for a 3D GPS fix using RAIM with the ability to discard one faulty satellite? (a) (b) (c) (d)

48.

from the beacon 50nm inland would be

Which statement regarding Mode S transponders is most correct? (a) (b) (c)

47.

The bearing information most correct The bearing information most correct The bearing information would be most correct The bearing information would be most correct

10250 10900 19000 20200

What is the lowest frequency where freedom from static interference can be guaranteed? (a) (b) (c) (d)

3 MHz 30MHz 300MHz 3 GHz



51.

Why does surface movement radar use a frequency in the SHF band and not EHF? (a) (b) (c) (d)

52.

What is the maximum distance apart, in metres, that an associated enroute VOR/DME can be sited? (a) (b) (c) (d)

53.

(b) (c) (d)

Night effect, station interference and lack of a failure warning system Night effect, station interference and latitude error Coastal refraction, timing error and night effect Coastal refraction, timing error and lack of a failure warning system

When a pilot is conducting a VDF/QGH procedure, he will require (a) (b) (c) (d)

56.

Latitude and longitude Latitude, longitude and altitude Latitude, longitude and time Latitude, longitude, altitude and time

Using an NDB it is possible to experience which of the following errors or limitations? (a)

55.

30 300 600 2000

What fix can be obtained from four satellites of the GPS system disregarding RAIM? (a) (b) (c) (d)

54.

EHF is potentially hazardous to personnel on the area. This was completely overcome by switching to SHF. The power requirements of EHF were unsustainable in the UK. SHF gives better definition of aircraft type than EHF EHF is absorbed and scattered by moisture in the air. Switching to SHF reduced the problem

an an an no

operator operator operator operator

on the ground only for the VDF procedure on the ground only for the QGH procedure on the ground for both the VDF and QGH procedures on the ground for either VDF or QGH procedures

The frequency at which skywaves should least affect reception (a) (b) (c) (d)

VLF LF MF HF



57.

An aircraft is on a VOR radial of 235°, heading 003°(M), and with the OBS set to 060. The correct indications are: (a) (b) (c) (d)

58.

the the the the

right left left right

DME / DME DME / DME or DME / VOR DME / VOR VOR / ADF

Are read only Can be modified by the pilot Can be read or written on to at any time. Are updated once every 28 weeks

1000nm 50nm 200nm 300nm

green magenta cyan amber

When is the IRS position updated: (a) (b) (c) (d)

63.

to to to to

The colour recommended in JAR OPS 1 for the active route is: (a) (b) (c) (d)

62.

deflection deflection deflection deflection

What is the range of long range ground radar? (a) (b) (c) (d)

61.

Scale Scale Scale Scale

The databases on a FMC (a) (b) (c) (d)

60.

½ ½ ½ ½

Positions on a Flight Management Computer are updated with information from: (a) (b) (c) (d)

59.

TO FROM TO FROM

continuously by the FMC at VOR beacons en route by the pilots at significant waypoints only on the ground only

With a transmission from an NDB aerial, the ..... component travels in the ..... plane and the signal is ..... polarised:(a) (b) (c) (d)

Magnetic Electrical Electrical Magnetic


vertical vertical horizontal horizontal

horizontally horizontally vertically vertically


64.

When conducting a QGH approach responsibility for interpreting the procedure rests with.............and on a VDF approach responsiblity rests with................... (a) (b) (c) (d)

65.

the the the the

pilot pilot controller controller

the the the the

controller pilot controller pilot

The sequence of AWR displays on the right has been achieved by selecting a ............... range then.............mode (a) (b) (c) (d)

shorter shorter longer longer


mapping contour contour mapping


Radio Navigation Exam 2, 65 Questions. Time allowed: 1hr 30min.

A B C D 1

23

2

24 25

3 4

A B C D

A B C D 45 46 47

26

48

5

27

49

6

28 29

50 51

30

52

9

31

53

10

32

11

33 34

54 55

7 8

12 13

56

35

57

14

36

58

15

37

16

38 39

59 60

17 18

61

40

62

19

41

63

20

42

21

43 44

64 65

22



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

b b a a a a a a a a a a c d a c d d d c

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

b b b a c c d b d c b d d c c d b d d b


41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

a c d b b c d b d b d c d a c a c b a d

61 62 63 64 65

b b d d b


Radio Nav Exam 2

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