062 – RADIO NAVIGATION

062 – RADIO NAVIGATION. What airborne equipment, if any, is required to be fitted in order that a VDF let-down may be flown? A – none B – VOR C – VHF radio D – VOR/DME Ref: all Ans: C 11133. The maximum theoretical range at which an aircraft at FL80 can obtain bearings from a ground VDF facility sited 325 FT above MSL is: A – 107 NM B – 158 NM C – 134 NM D – 114 NM Ref: all Ans: C 11148. Which of the following is an advantage of Ground/DF (VDF) let-down? 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 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 Ans: B 11181. What is the maximum range at which a VDF station at 325 ft can provide a service to an aircraft at FL080? A – 134 nm B – 107 nm C – 91 nm D – 114 nm Ref: all Ans: A 11214. 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 Ref: all Ans: D 11220. 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? A – 180 NM B – 220 NM C – 120 NM D – 150 NM Ref: all Ans: A 11248. In radio terms, frequency means: 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 D – the number of waveforms in one hour Ref: all Ans: C 11250. If, when you are requesting a QDM from an airfield, you are offered a QGH, is means: 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 bearings D – the service will be limited to bearings, no positions will be given by the DF station Ref: all Ans: C 11267. Which of the following is an advantage of VDF? A – No equipment required in the aircraft B – No special equipment required in the aircraft or on the ground C – Only a VHF radio is needed in the aircraft D – It is pilot interpreted, so ATC is not required Ref: all Ans: C 11280. With reference to a VDF bearing, the true bearing of the aircraft from the ground station is a: A – QTE B – QUJ C – QDR D – QDM Ref: all Ans: A 15501. What is the minimum level that an aircraft, at a range of 113 NM, must fly in order to contact the tower on R/T for a VDF bearing from an airport sited 169 FT above MSL. A – FL 50 B – FL 80 C –FL 100 D – FL 60 Ref: all Ans: D 15522. In which one of the following circumstances is ground direction finding (VDF) likely to be used to fix an aircraft’s position? 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 D – On first contact with ATC on crossing an international FIR boundary Ref: all Ans: C 16214. 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 received frequency will be: A – 11 MHz B – 10, GHz C – 9, GHz D – 11 GHz Ref: all Ans: B 16232. Ground DME responders respond at a frequency: A – the same as the interrogation signal B – 63 MHz grader than interrogation frequency C – 63 MHz lower than interrogation frequency D – 63 MHz different from interrogation frequency, either above or below Ref: all Ans: B 16236. The phase difference between the reference and variable signals on QDM 050o (VAR 10oW) for a conventional vor is: A – 050o B – 040o C – 230o D – 220o Ref: all Ans: C 16256. A VDF bearing can be obtained: A – only on a frequency of 121.5 MHz B – on the Approach frequency C – on the frequency notified for VDF services D – on the frequency agreed between the pilot and ATC but chosen from one of the available ATC frequencies Ref: all Ans: C 16257. Which of the following does NOT affect the accuracy of VDF bearings: A – sky waves B – duct propagation C – ground reflections D – synchronous transmissions Ref: all Ans: A 16258. The range at which you can obtain a VDF bearing can be influenced by: A – time of day B – type of surface C – height of aircraft D – intensity of ionisation Ref: all Ans: C 16261. Which of the following statements is correct in respect of a RF signal: 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 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 Ans: B 16264. A half wave dipole aerial suitable for transmitting an RF signal at 18 MHz should have an effective length of: A – 16,67 metres B – 166,67 metres C – 83,33 metres D – 8,33 metres Ref: all Ans: D 16265. Which of the following statements is true? 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 Ref: all Ans: D 16266. Diffraction of a RF signal is a displacement of its propagation path due to: A – reflection from the surface B – passing over or through mediums of different conductivity C – passing over obstacles with dimensions close to the wavelength D – passing through ionised regions of the upper atmosphere Ref: all Ans: C 16267. 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: A – 88,4 nm B – 88,4 nm C – 70,7 nm D – 200 km Ref: all Ans: A 16268. 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. 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 Ref: all Ans: D 16269. To establish and maintain effective HF communications the frequency used at a given range: A – should remain constant B – should be increased at night C – should be decreased at night D – should only be varied by season, decreased in summer and increased in winter Ref: all Ans: C 16270. (Refer to figure 062-06). In the following diagram, the phase difference between the two signals is: A – 90o B – 180o C – 270o D – 360o Ref: all Ans: B 16388. What is QTE? A – Magnetic track from the station B – Magnetic track to the station C – True track from station D – True track to the station Ref: all Ans: C 16389. Ground direction finding at aerodromes utilises when frequencies? 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 D – UHF at civil aerodromes and VHF at military aerodromes Ref: all Ans: C 16778. The emission characteristics A3E describe: A – ILS B – VHF communications C – HF communications D – VOR Ref: all Ans: B 21524. According to ICAO Annex 10, in which frequency band(s) does a locator normally transmit? A – HF/VHF B – MF/HF C – HF D – LF/MF Ref: all Ans: D 21588. What is the “Q” code for a magnetic bearing from a VDF station? A – “Request QNH” B – “Request QDR” C – “Request QTE” D – “Request QDM” Ref: all Ans: B