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Total 1061 Questions RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question What airborne equipment, if any, is required to be fitted in order that a VDF let-down may be flown? Choices...

Total 1061 Questions RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question What airborne equipment, if any, is required to be fitted in order that a VDF let-down may be flown? Choices Answers Correct A none B VOR C VHF radio C D VOR/DME Ref All Question The maximum theoretical range at which an aircraft at FL80 can obtain bearings from a ground VDF facility sited 325 FT above MSL is: Choices Answers Correct A 107 NM B 158 NM C 134 NM C D 114 NM Ref All Question Which of the following is an advantage of Ground/DF (VDF) let-down? Choices Answers Correct A It is pilot interpreted and does not require the assistance of ATC B It only requires a VHF radio to be fitted to the aircraft B C It does not require any special equipment to be fitted to the aircraft D It does not require any special equipment, apart from a VHF radio, to be installed in the aircraft or on the ground Ref All Question What is the maximum range at which a VDF station at 325 ft can provide a service to an aircraft at FL080? Choices Answers Correct A 134 nm A B 107 nm C 91 nm D 114 nm Ref All Question When conducting a QGH approach responsibility for interpreting the procedure rests with ___ and on a VDF approach responsibility rests with ___ Choices Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question When conducting a QGH approach responsibility for interpreting the procedure rests with ___ and on a VDF approach responsibility rests with ___ A the controller; the controller B the pilot; the pilot C the pilot; the controller D the controller; the pilot D Ref All Question What is the appropriate maximum theoretical range at which an aircraft at FL130 could receive information from a VDF facility which is sited 1024 FT above MSL? Choices Answers Correct A 180 NM A B 220 NM C 120 NM D 150 NM Ref All Question In radio terms, frequency means: Choices Answers Correct A the speed of radio waves in metres per second B the length of a complete waveform in metres C the number of complete waveforms passing a spot in one second C D the number of waveforms in one hour Ref All Question If, when you are requesting a QDM from an airfield, you are offered a QGH, is means: Choices Answers Correct A the bearing will only be accurate when the aircraft is flying above the QGH level B the VDF service will be handled by a different VDF unit, operating on the same frequency C the VDF unit is prepared to give you assistance during an approach to the airfield, based on VDF C bearings D the service will be limited to bearings, no positions will be given by the DF station Ref All Question Which of the following is an advantage of VDF? Choices Answers Correct A No equipment required in the aircraft RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Which of the following is an advantage of VDF? B No special equipment required in the aircraft or on the ground C Only a VHF radio is needed in the aircraft C D It is pilot interpreted, so ATC is not required Ref All Question With reference to a VDF bearing, the true bearing of the aircraft from the ground station is a: Choices Answers Correct A QTE A B QUJ C QDR D QDM Ref All Question In which one of the following circumstances is ground direction finding (VDF) likely to be used to fix an aircraft's position? Choices Answers Correct A When contacting ATC to join controlled airspace from the open FIR B When declaring an emergency on any frequency C When using the emergency VHF frequency 121.5 MHz C D On first contact with ATC on crossing an international FIR boundary Ref All Question An aircraft travelling at 330 metres a second transmits a signal at 10 GHz to a stationary receiver. If the aircraft is flying directly towards the receiver and they are approximately at the same height the Choices received frequency will be: Answers Correct A 11 MHz B 10,000011 GHz B C 9,999989 GHz D 11 GHz Ref All Question Ground DME responders respond at a frequency: Choices Answers Correct A the same as the interrogation signal B 63 MHz grader than interrogation frequency B RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Ground DME responders respond at a frequency: C 63 MHz lower than interrogation frequency D 63 MHz different from interrogation frequency, either above or below Ref All Question The phase difference between the reference and variable signals on QDM 050o (VAR 10oW) for a conventional vor is: Choices Answers Correct A 050o B 040o C 230o C D 220o Ref All Question A VDF bearing can be obtained: Choices Answers Correct A only on a frequency of 121.5 MHz B on the Approach frequency C on the frequency notified for VDF services C D on the frequency agreed between the pilot and ATC but chosen from one of the available ATC frequencies Ref All Question Which of the following does NOT affect the accuracy of VDF bearings: Choices Answers Correct A sky waves A B duct propagation C ground reflections D synchronous transmissions Ref All Question The range at which you can obtain a VDF bearing can be influenced by: Choices Answers Correct A time of day B type of surface C height of aircraft C RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The range at which you can obtain a VDF bearing can be influenced by: D intensity of ionisation Ref All Question Which of the following statements is correct in respect of a RF signal: Choices Answers Correct A the plane of polarisation is dictated by the oscillator unit in the transmitter B the electrical component of the signal is parallel to the aerial B C the magnetic component of the signal is parallel to the aerial D both the electrical and magnetic components are parallel to the aerial Ref All Question A half wave dipole aerial suitable for transmitting an RF signal at 18 MHz should have an effective length of: Choices Answers Correct A 16,67 metres B 166,67 metres C 83,33 metres D 8,33 metres D Ref All Question Which of the following statements is true? Choices Answers Correct A A broad bandwidth gives a narrow beam width B A narrow bandwidth improves beam width C A transmission's bandwidth is affected by the design of the aerial D Bandwidth must be reduced in order to reduce noise D Ref All Question Diffraction of a RF signal is a displacement of its propagation path due to: Choices Answers Correct A reflection from the surface B passing over or through mediums of different conductivity C passing over obstacles with dimensions close to the wavelength C D passing through ionised regions of the upper atmosphere Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question At a height of 5.000 feet you might expect to receive a VHF signal, from a transmitter at sea level, at a range of: Choices Answers Correct A 88,4 nm A B 88,4 nm C 70,7 nm D 200 km Ref All Question You are at an altitude of 9,000 feet. At a range of 200 nm from a VHF communications transmitter, and you are receiving a good signal. Choices Answers Correct A You should expect this since the transmitter is at a height of 2.000 feet B You should have been receiving the signal from a range of 240 nm C You are probably receiving a sky wave signal D You are probably receiving a duct propagation signal D Ref All Question To establish and maintain effective HF communications the frequency used at a given range: Choices Answers Correct A should remain constant B should be increased at night C should be decreased at night C D should only be varied by season, decreased in summer and increased in winter Ref All Question (Refer to figure 062-06).In the following diagram, the phase difference between the two signals is: Choices Answers Correct A 90o B 180o B C 270o D 360o Ref All Question What is QTE? Choices Answers Correct A Magnetic track from the station RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question What is QTE? B Magnetic track to the station C True track from station C D True track to the station Ref All Question Ground direction finding at aerodromes utilises when frequencies? Choices Answers Correct A VHF at civil aerodromes and VHF at military aerodromes B UHF at civil aerodromes and UHF at military aerodromes C VHF at civil aerodromes and UHF at military aerodromes C D UHF at civil aerodromes and VHF at military aerodromes Ref All Question The emission characteristics A3E describe: Choices Answers Correct A ILS B VHF communications B C HF communications D VOR Ref All Question According to ICAO Annex 10, in which frequency band(s) does a locator normally transmit? Choices Answers Correct A HF/VHF B MF/HF C HF D LF/MF D Ref All Question What is the Q code for a magnetic bearing from a VDF station? Choices Answers Correct A Request QNH B Request QDR B C Request QTE RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question What is the Q code for a magnetic bearing from a VDF station? D Request QDM Ref All Question Which of the following affects VDF range? Choices Answers Correct A Coastal refraction B The height of the transmitter and of the receiver B C Sky wave propagation D Strength of the pilot's voice when transmitting Ref All Question Which Q code would give a magnetic bearing from a VDF station: Choices Answers Correct A QDM B QDR B C QUJ D QTE Ref All Question Which Q code would give a magnetic heading to steer (nil wind) to a VDF station: Choices Answers Correct A QDM A B QDR C QUJ D QTE Ref All Question Which Q code would give a true track from a VDF station: Choices Answers Correct A QDM B QDR C QUJ D QTE D Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question When would VDF be used for a position fix: Choices Answers Correct A When an aircraft declares an emergency on any frequency B When first talking to a FIR on crossing an international boundary C When joining controlled airspace from uncontrolled airspace D When declaring an emergency on 121.5 MHz D Ref All Question The gain of an aerial is a measure of its ability to: Choices Answers Correct A Focus power B Transmit intelligence C Overcome transmitter line resistance D Compensate for attenuation D Ref All Question A frequency of 2400 KHz is equivalent to a wavelength of: Choices Answers Correct A 125 metres A B 105 metres C 0.80 cms D 8 metres Ref All Question Refraction of an electro-magnetic radiation is: Choices Answers Correct A The bending of its propagation path as it passes through or over areas of different electrical A conductivity B The loss of power as it passes through or over areas of different electrical conductivity C Is bending resultant from reflection from objects D Is loss of power through reflection from objects Ref All Question The VDF Homer service provides: Choices Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The VDF Homer service provides: A Accurate bearings on demand B A QGH procedure to transiting aeroplanes C Bearings which will normally be within ±5o accuracy to a range of 200NM C D Bearings which may be affected by synchronous transmissions Ref All Question An aircraft wishing to use the VDF service must: Choices Answers Correct A Be equipped with a VOR indicator unit B Transmit a signal for a long enough period for the bearing to be established B C Ask the controller to transmit for a long enough period to establish the bearing D Be within 10NM of the VDF aerial Ref All Question An aeroplane requesting a VDF bearing should: Choices Answers Correct A Avoid banking during transmission A B Not pass overhead VDF aerial C Ensure that ratio silence is maintained D Transmit on 121.5 MHz Ref All Question The VDF class B bearing is accurate to within: Choices Answers Correct A ±1o B ±2o C ±3o D ±5o D Ref All Question A class C magnetic bearing is received from a station. This is: Choices Answers Correct A A QUJ accurate to ±5o B A QDM accurate to ±10o RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question A class C magnetic bearing is received from a station. This is: C A QTE accurate to ±5o D A QDR accurate to ±10o D Ref All Question Decimetric waves correspond to the frequency range: Choices Answers Correct A 3000 to 30000 MHz B 3000 to 30000 KHz C 300 to 3000 MHz C D 300 to 3000 KHz Ref All Question VOR operates in the (i), transmitting a bearing signal by means of a (ii) and uses (iii) to determine the radial: Choices Answers Correct A (i) VHF (ii) Stationary limacon (iii) Phase comparison B (i) UHF (ii) Stationary limacon (iii) Phase comparison C (i) VHF (ii) Rotating limacon (iii) Phase comparison C D (i) UHF (ii) Rotating limacon (iii) Envelope matching Ref All Question What equipment does an aircraft need when carrying out a VDF letdown: Choices Answers Correct A VHF radio A B VOR C VOR/DME D None Ref All Question An aircraft receives a Class A true bearing from a VDF station. This is: Choices Answers Correct A A QUJ accurate to ±2o B A QTE accurate to ±2o B C A QUJ accurate to ±5o D A QTE accurate to ±5o RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An aircraft receives a Class A true bearing from a VDF station. This is: Ref All Question What is the wavelength corresponding to a frequency of 375 KHz: Choices Answers Correct A 8 m B 80 m C 800 m C D 8000 m Ref All Question What is the lowest frequency where freedom from static interference can be guaranteed? Choices Answers Correct A 3 MHz B 30 MHz B C 300 MHz D 3 GHz Ref All Question When a pilot is conducting a VDF/QGH procedure, he will require: Choices Answers Correct A an operator on the ground only for the VDF procedure B an operator on the ground only for the QGH procedure C an operator on the ground for both the VDF and QGH procedures C D no operator on the ground for either VDF or QGH procedures Ref All Question If a ground D/F controller passes a bearing thus: your true bearing is 256o, class alpha. This means: Choices Answers Correct A QTE accurate to ±5o B QUJ accurate to ±3o C QDR accurate to ±2o D QTE accurate to ±2o D Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The VHF frequency band has a wavelength limit of: Choices Answers Correct A 100 m to 10 m B 1 m to 100 cms C 10 m to 1 m C D 100 cms to 10 cms Ref All Question The wavelength of a radio signal is 200 metres. What is the frequency? Choices Answers Correct A 1.5 KHz B 1.5 GHz C 1.5 MHz C D 15 MHz Ref All Question The approximate ground waves of LF and MF are (by day) ___ and ___ respectively, with ___ suffering more from atmospheric attenuation. Choices Answers Correct A 1500nm; 1000nm; MF B 1000nm; 500nm; LF C 1000nm; 300nm; MF C D 500nm; 100nm; LF Ref All Question With reference to ground DF, the controller can refuse to give bearings if: Choices Answers Correct A the requesting aircraft is not from a consenting country B conditions are poor and bearings do not fall within the station's classified limits B C the pilot does not use the prescribed terminology D none of the above Ref All Question As the frequency of a transmitter is increased, the range of the ground wave will: Choices Answers Correct A Increase RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question As the frequency of a transmitter is increased, the range of the ground wave will: B Decrease B C Decrease only at night D Increase only over the sea Ref All Question A Class B VDF bearing has accuracy limits of plus or minus: Choices Answers Correct A 2 degrees B 7 degrees C 3 degrees D 5 degrees D Ref All Question Which of the following statements regarding VHF direction finding (VDF) is most accurate? Choices Answers Correct A it is simple and only requires a VHF radio on the ground B it is simple and requires a VHF radio and DF equipment in the aircraft C it is simple requiring only VHF radios on the ground and in the aircraft D it uses line of sign propagation D Ref All Question Given that the compass heading is 270o, the deviation is 2oW, the variation is 30oE and the relative bearing of a beacon is 316o, determine the QDR: Choices Answers Correct A 044 A B 048 C 074 D 224 Ref All Question An aircraft is HOMING to a radio beacon whilst maintaining a relative bearing of zero. If the magnetic heading decreases, the aircraft is experiencing: Choices Answers Correct A left drift B right drift B C a wind from the west RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An aircraft is HOMING to a radio beacon whilst maintaining a relative bearing of zero. If the magnetic heading decreases, the aircraft is experiencing: D zero drift Ref All Question An NDB transmits a signal pattern in the horizontal plane which is: Choices Answers Correct A a beam rotating at 20 Hz B bi-local circular C a cardioid balanced at 30 Hz D omnidirectional D Ref All Question Using an NDB it is possible to experience which of the following errors or limitations? Choices Answers Correct A Coastal refraction, timing error and night effect B Night effect, station interference and latitude error C Night effect, station interference and lack of a failure warning system C D Coastal refraction, timing error and lack of a failure warning system Ref All Question With a transmission from an NDB aerial, the ___ component travels in the ___ plane and the signal is ___ polarised. Choices Answers Correct A magnetic; horizontal; vertically A B electrical; horizontal; vertically C electrical; vertical; horizontally D magnetic; vertical; horizontally Ref All Question Factors liable to affect most NDB/ADF system performance and reliability include: Choices Answers Correct A height error - station interference - mountain effect B static interference - station interference - latitude error C static interference - night effect - absence of failure warning system C D coastal refraction - lane slip - mountain effect Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The BFO selector on an ADF receiver is used to: Choices Answers Correct A find the loop NULL position B stop loop rotation C hear the IDENT and must always be switched ON D hear the IDENT of some NDB stations radiating a continuous wave signal D Ref All Question When considering the propagation of ADV transmissions night effect is most pronounced: Choices Answers Correct A at dusk and dawn A B during the long winter nights C at or near the coast D when flying at low altitude Ref All Question In order to obtain an ADF bearing the: Choices Answers Correct A signal must be received by both the sense and loop aerials A B sense aerial must be tuned separately C mode selector should be switched to LOOP D BFO switch must be selected to ON Ref All Question An NDB signal crossing from land to sea will ___ speed and bend ___ the normal. Choices Answers Correct A decrease, towards B increase, towards C decrease, away from D increase, away from D Ref All Question 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: Choices Answers Correct A either at right angles or in line with the incoming signals RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question 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: B in line with the incoming signals B C at right angles to the incoming signals D aligned with the aircraft nose Ref All Question Errors caused by the effect of coastal refraction on bearings at lower altitudes are maximum when the NDB is: Choices Answers Correct A near the coast and the bearing crosses the coast at right angles B inland and the bearing crosses the coast at an acute angle B C inland and the bearing crosses the coast at right angles D near the coast and the bearing crosses the coast at an acute angle Ref All Question Quadrantal errors associated with aircraft Automatic Direction Finding (ADF) equipment are caused by: Choices Answers Correct A misalignment of the loop aerial B signal bending caused by electrical interference from aircraft wing C signal bending by the aircraft metallic surfaces C D sky wave/ground wave contamination Ref All Question Which one of the following disturbances is most likely to cause the greatest inaccuracy in ADF bearings? Choices Answers Correct A Coastal effect B Local thunderstorm activity B C Quadrantal error D Precipitation interference Ref All Question Which of the following is the ICAO allocated frequency band for ADF receivers? Choices Answers Correct A 255 - 455 kHz B 190 - 1750 kHz B C 300 - 3000 kHz RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Which of the following is the ICAO allocated frequency band for ADF receivers? D 200 - 2000 kHz Ref All Question A radio beacon has an operational range of 10 NM. By what factor should the transmitter power be increased in order to achieve an operational range of 20 NM? Choices Answers Correct A Eight B Six C Four C D Two Ref All Question The accuracy of ADF within the DOC by day is: Choices Answers Correct A +/-1 deg B +/-2 deg C +/-5 deg C D +/-10 deg Ref All Question What is the wavelength of an NDB transmitting on 375 kHZ? Choices Answers Correct A 8 m B 8000 m C 800 m C D 80 m Ref All Question Which of the following factors could cause an error of an ADV bearing of an NDB? Choices Answers Correct A Scalloping B Atmospheric scatter C Phase interference D Night effect D Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The D layer of the ionosphere affects the accuracy of NDB bearings: Choices Answers Correct A by day and night B by day only C by night only D never D Ref All Question Night Effect which causes loss of signal and fading, resulting in bearing errors from NDB transmissions, is due to: Choices Answers Correct A sky wave distortion of the null position and is maximum at dawn and dusk A B interference from other transmissions and is maximum at dusk when east of the NDB C static activity increasing at night particularly in the lower frequency band D the effect of the Aurora Borealis Ref All Question 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: Choices Answers Correct A NDB: aircraft position VOR: aircraft position B NDB: beacon position VOR: beacon position C NDB: beacon position VOR: aircraft position D NDB: aircraft position VOR: beacon position D Ref All Question The signal to noise ratio for an NDB is ___ allowing a maximum error of ___ on 95% of occasions during ___ Choices Answers Correct A 3/1, ±5 degrees, daylight hours only A B 3/1, ±5 degrees, 24 hours C 5/1, ±3 degrees, 24 hours D 5/1, ±3 degrees, daylight hours only Ref All Question An aircraft heading 315oM shows an NDB bearing 180o on the RMI. Any quadrantal error affecting the accuracy of this bearing is likely to be: Choices Answers Correct A zero, as quadrantal errors are not found on the RMI RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An aircraft heading 315oM shows an NDB bearing 180o on the RMI. Any quadrantal error affecting the accuracy of this bearing is likely to be: B at a maximum B C at a minimum D zero, as quadrantal errors affect only the VOR Ref All Question The purpose of the BFO switch on the ADF receiver is to: Choices Answers Correct A make the signal audible A B cut out the static noise C improve the strength of the received signal D attenuate the received signal Ref All Question Given: Compass heading 270o Choices Deviation 2oW Variation 30oE Relative bearing 316o What is the QDR? Answers Correct A 224o B 226o C 046o D 044o D Ref All Question Which of the following is likely to have the greatest effect on ADF accuracy? Choices Answers Correct A Interference from other NDBs, particularly during the day B Frequency drift at the ground station C Interference from other NDBs, particularly at night C D Mutual interference between aircraft aerials Ref All Question There are two NDBs, one 20 NM inland, and the other 50 NM inland from the coast. Assuming that the error caused by coastal refraction is the same for both propagations, the extend of the error is a position line RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question There are two NDBs, one 20 NM inland, and the other 50 NM inland from the coast. Assuming that the error caused by coastal refraction is the same for both propagations, the extend of the error is a position line Choices plotted by an aircraft that is over water will be: Answers Correct A the same from both beacons when the aircraft is on a relative bearing of 180o and 360o B greater from the beacon that is 20 NM inland C the same from both beacons when the aircraft is on a relative bearing of 090o and 270o D greater from the beacon that is 50 NM inland D Ref All Question A long range NDB is likely to transmit on ___ and be classified as ___ Select the answer to complete this statement Choices Answers Correct A 200 Khz; A2A B 800 Khz; A2A C 200 Khz; A1A C D 800 Khz; A1A Ref All Question The nominal maximum range of an NDB with a transmitter power is 200 watts is: Choices Answers Correct A 50 to 60 nm A B 100 to 120 nm C 150 to 170 nm D 200 to 200 nm Ref All Question An ADF uses a sense aerial to: Choices Answers Correct A determine the null position B resolve ambiguous bearings B C transmit the beacon ident D detect the receiver test signal Ref All Question A relative bearing indicator shows 030o. The heading of the aeroplane is 090o M. The intercept angle for a course to the NDB of 180o M is: Choices Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question A relative bearing indicator shows 030o. The heading of the aeroplane is 090o M. The intercept angle for a course to the NDB of 180o M is: A 120o B 030o C 150o D 060o D Ref All Question An RMI shows the bearing of an NDB as 020o. The heading of the aeroplane is 020o M. In order to intercept an outbound course of 330o (from the NDB) at an angle of 40o, the aeroplanes heading should be Choices altered to: Answers Correct A 010o A B 330o C 300o D 040o Ref All Question An aeroplanes RMI shows an NDB bearing 070o, w/v calm. The aeroplane is to join a right hand holding pattern at the NDB, the inbound leg of which is 330o. The aeroplane should: Choices Answers Correct A fly to the NDB and join the pattern A B fly to the NDB then fly outbound on 150o for 1 minute C fly to the NDB then fly a teardrop with an outbound heading of 120o for 1 minute and a rate one turn to join in bound D fly to the NDB then fly choose either (B) or (C) above as preferred Ref All Question An aeroplane is flying parallel to a coast. Which of the following NDBs will give the greatest costal refraction LOP error? Choices Answers Correct A NDB sited on the coast-RBI 330o B NDB sited 30 nm inland-RBI 330o B C NDB sited on the coast-RBI 300o D NDB sited 30 nm inland-RBI 300o Ref All Question The BFO: Choices Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The BFO: A creates the audio ident for an NDB B is used to make the ident from an A2A NDB audible C is used to make the ident from an A1A NDB audible C D is used to determine the signal strength of an NDB Ref All Question Which of the following is true about the ADF? Choices Answers Correct A Its accuracy is the same by day and by night B It does not have a signal failure warning B C It should not be used at night because of sky waves D Sky waves do not affect the bearing accuracy provided they come from the correct NDB Ref All Question What is the role of a ground direction finder? Choices Answers Correct A To aid pilot navigation A B To halt ground movements C To map airfields D To assist planners in the construction of airfield approaches Ref All Question What is the approved frequency band assigned to aeronautical NDBs? Choices Answers Correct A 190-1750 Hz B 190-1750 KHz B C 190-1750 MHz D 190-1750 GHz Ref All Question With regard to the following types of NDB which statements is correct? Choices Answers Correct A Locators have 200 W power, 50 nm range and are NON A2A B Locators have 15 W power, 10-25 nm range and are NON A2A B RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question With regard to the following types of NDB which statements is correct? C Locators have 5000 W power, 50 nm range and are NON A2A D Locators have 5000 W power, 50 nm range and are NON A1A Ref All Question An NDB aerial is (i) so as to ensure the range is (ii) by minimising (iii) due to (iv): Choices Answers Correct A (i) horizontal; (ii) maximum; (iii) diffraction; (iv) the ground wave B (i) vertical; (ii) maximum; (iii) attenuation; (iv) energy losses to the surface B C (i) horizontal; (ii) maximum; (iii) refraction; (iv) the D layer D (i) vertical; (ii) maximum; (iii) attenuation; (iv) atmospheric refraction Ref All Question If an NDB with a transmitter power of 25 KW which has a range of 50 nm is adjusted to give a power output of 100 KW the new range of the NDB will be approximately: Choices Answers Correct A 100 nm A B 200 nm C 300 nm D 400 nm Ref All Question ADF bearings by an aeroplane by day within the published protection range should be accurate to within a maximum error of: Choices Answers Correct A +/-10o B +/-2.5o C +/-2o D +/-5o D Ref All Question A cumulonimbus cloud in the vicinity of an aeroplane can cause certain navigation systems to give false indications. This is particularly true of the: Choices Answers Correct A ADF A B VOR C weather radar D DME RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question A cumulonimbus cloud in the vicinity of an aeroplane can cause certain navigation systems to give false indications. This is particularly true of the: Ref All Question A VOR and an ADF are co-located. You cross the VOR radial of 240 on a heading of 360o (M). In the vicinity of the station you should read an ADF bearing of: Choices Answers Correct A 60 A B 240 C 300 D 120 Ref All Question An ADF provides the aircraft with bearing information with respect of a ground station. To do this, the ground station emits a signal pattern which is: Choices Answers Correct A a beam rotating at 30 Hertz B frequency modulated at 30 Hertz C omni-directional C D unidirectional Ref All Question An NDB is on a relative bearing of 316o from an aircraft. Given: Choices Compass heading 270o At aircraft deviation 2oW, Variation 30oE At station Variation 28oE Calculate the true bearing of the NDB from the aircraft: Answers Correct A 252o B 254o B C 072o D 074o Ref All Question An RMI indicates aircraft heading and bearing. To convert the RMI bearings of NDBs and VORs to true bearings the correct combination for the application of magnetic variation is: Choices Answers Correct A NDB: aircraft position VOR: aircraft position RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An RMI indicates aircraft heading and bearing. To convert the RMI bearings of NDBs and VORs to true bearings the correct combination for the application of magnetic variation is: B NDB: beacon position VOR: beacon position C NDB: beacon position VOR: aircraft position D NDB: aircraft position VOR: beacon position D Ref All Question Given: W/V (T): 230/20 kt Choices Var: 6E TAS: 80 kt What relative bearing from an NDB should be maintained in order to achieve an outbound course of 257o (M) from overhead the beacon? Answers Correct A 172 B 188 B C 008 D 352 Ref All Question If a failed RMI rose is stuck on 090o and the ADF pointer indicates 225o, the relative bearing to the station will be: Choices Answers Correct A 135o A B Impossible to read, due to the RMI failure C 315o D 225o Ref All Question In accordance with Doc 8168, a pilot flying an NDB approach must achieve a tracking accuracy within ___ of the published approach track. Choices Answers Correct A +/-10o A B +/- 5o C +/- 2.5o D +/- 2o Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question In order to obtain an ADF bearing on a system using sense and loop aerials, the: Choices Answers Correct A mode selector should be switched to loop B sense aerial must be tuned separately C signal must be received by both the sense and loop aerials C D BFO switch must be selected to ON Ref All Question On the QDR of 075o (in the vicinity of the station) with a magnetic heading of 295o, the relative bearing on the ADF indicator is: Choices Answers Correct A 140o B 040o C 220o D 320o D Ref All Question On which of the following displays are you able to get a direct read-out (no calculation is necessary from the pilot) of the magnetic bearing from the aircraft to the NDB? Choices Answers Correct A Fixed card ADF and RMI B Moving card ADF and RMI B C Moving and fixed card ADF D Fixed card ADF only Ref All Question The BFO selector switch on the ADF control panel must be in the on position to enable the pilot to: Choices Answers Correct A stop the loop rotation B adjust the loop to the aural null position C hear the IDENT of NDBs using NON A1A transmissions C D hear the IDENT of NDBs using NON A2A transmissions Ref All Question There are two NDBs, one 20 NM inland, and the other 50 NM inland from the coast. Assuming that the error caused by coastal refraction is the same for both propagations, the extent of the error in a position line Choices plotted by an aircraft that is over water: Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question There are two NDBs, one 20 NM inland, and the other 50 NM inland from the coast. Assuming that the error caused by coastal refraction is the same for both propagations, the extent of the error in a position line plotted by an aircraft that is over water: A greater from the beacon that is 20 NM inland B the same from both beacons when the aircraft is on a relative bearing of 180o and 360o C greater from the beacon that is 50 NM inland C D the same from both beacons when the aircraft is on a relative bearing of 090o and 270o Ref All Question What according to ICAO Annex 10 is the range of a locator? Choices Answers Correct A 50 - 100 NM B 25 - 50 NM C 10 - 25 NM C D 100 - 300 NM Ref All Question What actually happens in the ADF receiver when the BFO position is selected? Choices Answers Correct A The BFO circuit is activated, and the receiver accepts only A1A modulated signals B The BFO circuit oscillates at an increased frequency in order to allow identification of A2A NDBs C The BFO circuit is de-activated D The BFO circuit imposes a tone onto the carrier wave to make the NDB's ident audible D Ref All Question Which of the following is correct regarding the range of an NDB? Choices Answers Correct A The range is limited to the line of sight B Aircraft height is not limiting for the reception of signals from the NDB B C The range of an NDB will most likely increase at day time compared to night time D The transmitter power of the NDB station has no affect on the range Ref All Question You are on a magnetic heading of 055o and your ADF indicates a relative bearing of 325o. The QDM is: Choices Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question You are on a magnetic heading of 055o and your ADF indicates a relative bearing of 325o. The QDM is: A 235o B 200o C 055o D 020o D Ref All Question Which combination gives the greatest reduction in reliability of ADF: Choices Answers Correct A Station interference; Static interference; Lane slip B Mountain effect; Station interference; site error C Night effect; Static interference; Quadrantal error C D Nigh effect; Quadrantal error; Station interference Ref All Question What gives the greatest error in ADF: Choices Answers Correct A Coastal effect B Night effect C Static interference from thunderstorms C D Quadrantal error Ref All Question The nominal maximum range of an NDB with a transmitter power is 200 watts is: Choices Answers Correct A 40 to 45 NM A B 100 to 120 NM C 150 to 170 NM D 200 to 220 NM Ref All Question The ICAO allocated band of frequencies for NDB is: Choices Answers Correct A 255 - 455 KHz B 200 - 1750 KHz B RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The ICAO allocated band of frequencies for NDB is: C 255 - 1750 KHz D 200 - 455 KHz Ref All Question An aircraft 10 nm from a north-south coastline takes two three-position line fixes from an inland NDB. The aircraft's indicated position is: Choices Answers Correct A Nearer to the coastline than its actual position A B Further from the coastline than its actual position C Correct because the coastal refraction errors will cancel out because two fixes have been taken D Correct in azimuth but false in range Ref All Question Using an ADF loop aerial the maximum signal will be received when: Choices Answers Correct A The loop is in line with the NDB aerial A B The loop is at 90o to the NDB aerial C Within the promulgated range D During daytime only Ref All Question When identifying an NDB (NON A1A) it is necessary to: Choices Answers Correct A Turn the BFO on A B Turn the BFO off C Turn the ANT on D Turn the ANT off Ref All Question Which of the following are all errors associated with ADF: Choices Answers Correct A selective availability, coastal refraction, night effect B night effect, quadrantal error, lane slip C mountain effect, station interference, static interference C D selective availability, coastal refraction, quadrantal error RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Which of the following are all errors associated with ADF: Ref All Question What action must be taken to receive a bearing from an ADF: Choices Answers Correct A BFO on B Select the loop position C Both the loop and sense aerials must receive the signal C D Select the ANT position Ref All Question Which of the following is the most significant error in ADF: Choices Answers Correct A quadrantal error B coastal refraction C precipitation static D static from Cb D Ref All Question When using ADF (i), the accuracy is (ii) than (iii), because the surface wave is (iv): Choices Answers Correct A (i) by day; (ii) greater; (iii) by night; (iv) not present B (i) by night; (ii) greater; (iii) by day; (iv) not present C (i) by night; (ii) less; (iii) by day; (iv) contaminated by sky waves C D (i) by day; (ii) less; (iii) by night; (iv) contaminated by sky waves Ref All Question Snow will affect ADF by: Choices Answers Correct A Decreasing the range B Decreasing the accuracy C Having no effect C D Decreasing the range and accuracy Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An NDB has a range of 50 nm with a power output of 80 watts: The power required to increase the range to 75 nm is: Choices Answers Correct A 120 watts B 150 watts C 180 watts C D 320 watts Ref All Question Do all ADF systems have a sense aerial: Choices Answers Correct A Always A B Only when a rotating loop system is being used C Never D Only when a fixed loop system is being used Ref All Question If an NDB signal is received at a range of 1000 nm: Choices Answers Correct A The signal is a surface wave and is quite usable B It will be a ground wave and will be inaccurate C It is a space wave and will be inaccurate D It is a sky wave and is inaccurate D Ref All Question The maximum errors when using ADF will occur in which of the following situations:(i) Position of the NDB (ii) Angle of cut at the coast Choices Answers Correct A (i) On the coast; (ii) 90o B (i) Well inland; (ii) 90o C (i) On the coast; (ii) 15o D (i) Well inland; (ii) 20o D Ref All Question NDB operate in the: Choices Answers Correct A VLF and LF bands RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question NDB operate in the: B LF and MF bands B C VLF, LF and MF bands D VLF and MF bands Ref All Question When considering the use of NDB, night effect has its greatest effect during: Choices Answers Correct A Autumn and winter B When using inland beacons C When using a horizontally polarised signal D At dawn and dusk D Ref All Question An aircraft over the sea will experience (i) coastal refraction effect when the radio waves cross the coastline at (ii) and the NDB is (iii): Choices Answers Correct A (i) More; (ii) 90o; (iii) Near the coast B (i) Less; (ii) 45o; (iii) Well inland C (i) Less; (ii) 90o; (iii) Near the coast C D (i) More; (ii) 45o; (iii) On the coast Ref All Question An ADF is correctly tuned to an NDB, the needle is hunting and the signal is fading and growing louder alternately, the reason for this is: Choices Answers Correct A The required sky wave is being interfered with by the ground wave from another NDB B The required ground wave is being contaminated by sky waves B C Scalloping D The aircraft is flying outside the designated operational coverage Ref All Question When converting VOR and ADF bearings to true, the variation at the (i) should be used for VOR and at the (ii) for ADF: Choices Answers Correct A (i) Aircraft; (ii) aircraft B (i) Aircraft; (ii) station C (i) Station; (ii) aircraft C RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question When converting VOR and ADF bearings to true, the variation at the (i) should be used for VOR and at the (ii) for ADF: D (i) Station; (ii) station Ref All Question Two NDBs, one 20 nm from the coast and the other 50 nm further inland. Assuming Coastal Refraction is the same for each, from which NDB will an aircraft flying over the sea receive the greatest error? Choices Answers Correct A The NDB at 20 nm B The NDB at 50 nm B C Same when the relative bearing is 090/270 D Same when the relative bearing is 180/360 Ref All Question The allocated coverage of NDBs is: Choices Answers Correct A 250 - 450 KHz B 190 - 1750 KHz B C 108 - 117.95 MHz D 200 - 500 KHz Ref All Question What antennae must be used to obtain an ADF bearing? Choices Answers Correct A Loop B Sense C Loop and sense C D Radome Ref All Question For long range NDBs the most common type is: Choices Answers Correct A LF NON A1A A B LF NON A2A C MF NON A1A D MF NON A2A Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question RMI rose is mechanically stuck on 090 degrees. The ADF pointer indicates 225 degrees. What is the relative bearing to the beacon? Choices Answers Correct A 225 degrees B 135 degrees B C Cannot be determined D 000 degrees Ref All Question NDBs transmit mainly in the: Choices Answers Correct A VHF band B UHF band C HF band D MF band D Ref All Question The 95% accuracy for ADF bearings of an NDB by day is: Choices Answers Correct A ±2o B ±7o B C ±10o D ±3o Ref All Question When receiving an NDB signal on an ADF receiver the BFO can be selected OFF for the: Choices Answers Correct A tone signal on NONA1A B ident signal on NONA1A C tone signal on NONA2A D ident signal on NONA2A D Ref All Question An aircraft is tracking 060o (T) in still air. The relative bearing of an NDB is 035o at 1300. 12 min later the relative bearing is 070o. If the G/S is 180kt, what is the aircraft's distance from the NDB at Choices 1312: Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An aircraft is tracking 060o (T) in still air. The relative bearing of an NDB is 035o at 1300. 12 min later the relative bearing is 070o. If the G/S is 180kt, what is the aircraft's distance from the NDB at 1312: A 18 nm B 36 nm B C 24 nm D 30 nm Ref All Question A radio beacon has range of 10 nm. By what factor should the power be increased to achieve a range of 20 nm? Choices Answers Correct A 16 B 2 C 4 C D 8 Ref All Question A NDB transmits a signal pattern which is: Choices Answers Correct A A 30 Hz polar diagram B Omni-directional B C A bi-lobal pattern D A beam rotating at 30 Hz Ref All Question The frequency band chosen for NDB¿s is: Choices Answers Correct A upper MF and lower LF B VLF C upper LF and lower MF C D LF Ref All Question To maintain the 314o QDR inbound to a NDB with 7o starboard drift, the heading in oM and relative bearing will be: Choices Answers Correct A A – 321; 173 RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question To maintain the 314o QDR inbound to a NDB with 7o starboard drift, the heading in oM and relative bearing will be: B B – 127; 007 B C C – 141; 353 D D – 307; 183 Ref All Question Which of the following may cause inaccuracies in ADF bearings? Choices Answers Correct A static interference, height effect, lack of failure warning B station interference, mountain effect, selective availability C coastal refraction, slant range, night effect D lack of failure warning, station interference, static interference D Ref All Question On the B737-400 EHSI what happens if the selected VOR fails? Choices Answers Correct A the display blanks and a fail warning appears B the deviation bar is removed B C a fail flag is displayed alongside the display bar D the display flashes Ref ATPL A Question If the signal from a VOR is lost, how is this shown on the B737-400 EHSI display? Choices Answers Correct A By removal of the deviation bar and pointer A B By showing a fail flag alongside the deviation bar C A flashing red FAIL message appears in the frequency location D An amber FAIL message appears in the frequency location Ref All Question An aircraft is flying on the true track 090o towards a VOR station located near the equator where the magnetic variation is 15oE. The variation at the aircraft position is 8oE. The aircraft is on VOR Choices radial: Answers Correct A 255o A B 278o RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An aircraft is flying on the true track 090o towards a VOR station located near the equator where the magnetic variation is 15oE. The variation at the aircraft position is 8oE. The aircraft is on VOR radial: C 262o D 285o Ref All Question The frequency range of a VOR receiver is: Choices Answers Correct A A – 108 to 117.95 MHz A B B – 108 to 111.95 MHz C C – 118 to 135.95 MHz D D – 108 to 135.95 MHz Ref All Question An aircraft is 100 NM from a VOR facility. Assuming no error when using a deviation indicator where 1 dot = 2o deviation, how many dots deviation from the centre line of the instrument will represent the limits Choices of the airway boundary? (Assume that the airway is 10 NM wide) Answers Correct A 6.0 B 3.0 C 4.5 D 1.5 D Ref All Question When tracking a VOR radial inbound the aircraft would fly? Choices Answers Correct A a constant track B a great circle track B C a rhumb line track D a constant heading Ref All Question (Refer to figure 062-04)An aircraft is attempting to track 186oM on an airway defined by a VOR 80 nm away. The VOR indicates the aircraft position. With these indications the aircraft is on the ___ radial and Choices ___ the airway. Answers Correct A 001o outside A B 181o inside RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question (Refer to figure 062-04)An aircraft is attempting to track 186oM on an airway defined by a VOR 80 nm away. The VOR indicates the aircraft position. With these indications the aircraft is on the ___ radial and ___ the airway. C 001o inside D 181o outside Ref All Question An aircraft is on radial 120 with a magnetic heading of 300o, the track selector (OBS) reads: 330. The indications on the Course Deviation Indicator (CDI) are fly: Choices Answers Correct A left with FROM showing B right with TO showing C right with FROM showing D left with TO showing D Ref All Question An aircraft is on a heading of 100 degrees (m) from a VOR. To make the VOR/ILS deviation indicator needle centralise with the TO flag showing, the following bearing should be selected on the OBS: Choices Answers Correct A 100 degrees B 110 degrees C 290 degrees D 280 degrees D Ref All Question The basic principle of operation of a standard VOR is by: Choices Answers Correct A phase comparison between a 108 Mhz reference signal and a 30 Hz variable signal B phase difference between a frequency modulated reference signal and an amplitude modulated B variable signal C phase comparison between an amplitude modulated reference signal and a frequency modulated variable signal D phase comparison between a 30 Hz reference signal and a 108 Mhz variable signal Ref All Question Given: Magnetic heading 280o VOR radial 090o Choices What bearing should be selected on the omni-bearing selector in order to centralise the VOR deviation needle with a TO indication? RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Given: Magnetic heading 280o VOR radial 090o What bearing should be selected on the omni-bearing selector in order to centralise the VOR deviation needle with a TO indication? Answers Correct A 100o B 280o C 270o C D 090o Ref All Question An aircraft is tracking inbound to a VOR beacon on the 105 radial. The setting the pilot should put on the OBS and the CDI indications are: Choices Answers Correct A 285, TO A B 105, TO C 285, FROM D 105, FROM Ref All Question Transmissions from VOR facilities may be adversely affected by: Choices Answers Correct A static interference B uneven propagation over irregular ground surfaces B C night effect D quadrantal error Ref All Question Given: VOR station position N61o E025o, variation 13oE. Estimated position of an Choices aircraft N59o E025o, variation 20oE What VOR radial is the aircraft on? Answers Correct A 167o A B 347o C 160o D 193o RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Given: VOR station position N61o E025o, variation 13oE. Estimated position of an aircraft N59o E025o, variation 20oE What VOR radial is the aircraft on? Ref All Question An aircraft is on a VOR radial of 235o, heading 003o(M), and with the OBS set to 060. The correct indications are: Choices Answers Correct A TO: ½ Scale deflection to the left A B FROM: ½ Scale deflection to the left C TO: ½ Scale deflection to the right D FROM: ½ Scale deflection to the right Ref All Question If an aircraft flies along a VOR radial it will follow a: Choices Answers Correct A rhumbline track B great circle track B C line of constant bearing D constant magnetic track Ref All Question What is the maximum theoretical range that an aircraft at FL 150 can receive signals from a VOR situated 609 feet above MSL? Choices Answers Correct A 156 NM B 220 NM C 147 NM D 184 NM D Ref All Question An aircraft is required to approach a VOR via the 104o radial. Which of the following settings should be made on the VOR/ILS deviation indicator? Choices Answers Correct A 284o with the FROM flag showing B 284o with the TO flag showing B C 104o with the TO flag showing RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An aircraft is required to approach a VOR via the 104o radial. Which of the following settings should be made on the VOR/ILS deviation indicator? D 104o with the FROM flag showing Ref All Question A VOR is sited at position 58o00 N 073o00 W where the magnetic variation equals 32oW. An aircraft is located at position 56o00 N 073o00 W where the magnetic variation equals 28oW. The aircraft is on VOR Choices radial: Answers Correct A 360 B 208 C 212 C D 180 Ref All Question The VOR system is limited to about 1o of accuracy. One degree at 200 NM represents a width of: Choices Answers Correct A 2.0 NM B 3.5 NM B C 2.5 NM D 3.0 NM Ref All Question Using a VOR outside the DOC may result in interference from: Choices Answers Correct A other beacons A B other aircraft C sky waves D ground waves Ref All Question The antenna polar diagram of a conventional VOR: Choices Answers Correct A Is always directed towards the aircraft B Is like a figure of 8 C Is a pencil beam D Rotates at 30 revolutions per second D RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question The antenna polar diagram of a conventional VOR: Ref All Question The two signals transmitted by a conventional VOR ground station are 90o out of phase on magnetic: Choices Answers Correct A west B south C east C D north Ref All Question The RMI indicates aircraft magnetic heading. To convert the RMI bearings of NDBs and VORs to true bearings the correct positions to read magnetic variation are: (VOR), (NDB) Choices Answers Correct A aircraft position, beacon positionB - beacon position, beacon position B beacon position, aircraft position C aircraft position, aircraft position C Ref All Question With reference to the VOR: Choices Answers Correct A Failure of the monitor will cause the beacon to cease its ident A B A typical VOR frequency is 118.15 Mhz C The TO/FROM indicator shows whether the aircraft is heading towards or away from the beacon D Wide coverage is obtained from only a few beacons Ref All Question Which of the following statements concerning the variable, or directional, signal of a conventional VOR is correct? Choices Answers Correct A The transmitter varies the amplitude of the variable signal by 30 Hz each time it rotates B The rotation of the variable signal at a rate of 30 times per second gives it the B characteristics of a 30 Hz amplitude modulation C The transmitter changes the frequency of the variable signal by 30 Hz either side of the allocated frequency each time it rotates D The receiver adds 30 Hz to the variable signal before combining it with the reference signal Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Given: Course Deviation Indicator (CDI) for a VOR is selected to 090o. Choices From/To indicator indicates TO CDI needle is deflected halfway to the right On what radial is the aircraft? Answers Correct A 085 B 275 B C 265 D 095 Ref All Question In order to plot a bearing from a VOR station, a pilot needs to know the magnetic variation: Choices Answers Correct A at the VOR A B at the aircraft location C at the half-way point between the aircraft and the station D at both the VOR and aircraft Ref All Question The captain of an aircraft flying at FL 100 wishes to obtain weather information at the destination airfield (0 ft MSL) from the airfields VOR. At what maximum theoretical range will it be possible to Choices obtain this information? Answers Correct A 1230 km B 123 km C 12.3 NM D 123 NM D Ref All Question If the reference phase differs 30o with the variable phase the radial from the VOR station will be: Choices Answers Correct A 030o A B 330o C 210o D 150o Ref All RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question Which frequency band is used by VOR transmissions? Choices Answers Correct A SHF B UHF C VHF C D HF Ref All Question An aircraft at FL 100 should be able to receive a VOR ground station at 100 FT above MSL at an approximate maximum range of: Choices Answers Correct A 135 NM A B 123 NM C 128 NM D 142 NM Ref All Question For a conventional VOR a phase difference of 090 deg would be achieved by flying ___ from the beacon. Choices Answers Correct A west B north C east C D south Ref All Question An airway 10 NM wide is to be defined by two VORs each having a resultant bearing accuracy of plus or minus 5.5o. In order to ensure accurate track guidance within the airway limits the maximum distance Choices apart for the transmitter is approximately: Answers Correct A 165 NM B 50 NM C 105 NM C D 210 NM Ref All Question An RMI slaved to a remote indicating compass has gone unserviceable and is locked on to a reading of 090o. The tail of the VOR pointer shows 135o. The available information from the VOR is: Choices Answers Correct RADIO NAVIGATION RADIO AIDS - Ground Direction Finder D/F (including classification of bearings) Question An RMI slaved to a remote indicating compass has gone unserviceable and is locked on to a reading of 090o. The tail of the VOR pointer shows 135o. The available information from the VOR is: A Radial 315o, relative bearing unknown B Radial unknown, relative bearing 225o C Radial unknown, relative bearing 045o D Radial 135o, relative bearing unknown D Ref All Question (Refer to figure 062-05)Refer to the diagram of a VOR/ILS deviation indicator. Assume that the indicator is set to define the centreline of an airway, that the aircraft is 90 nm from the VOR and inbound to the Choices facility. At the time of observation the aircraft was located on radial: