#1. 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?
#2. The maximum theoretical range at which an aircraft at FL80 can obtain bearings from a ground VDF facility sited 325 FT above MSL is:
#3. 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?
#4. What airborne equipment, if any, is required to be fitted in order that a VDF letdown may be flown?
#5. Which of the following is an advantage of Ground/DF (VDF) let-down?
#6. In which one of the following circumstances is ground direction finding (VDF) likely to be used to fix an aircraft’s position?
#7. An aircraft is “”homing”” to a radio beacon whilst maintaining a relative bearing of zero. If the magnetic heading decreases, the aircraft is experiencing :
#8. Given : Compass heading 270°Deviation 2°WVariation 30°E Relative bearing 316° What is the QDR?
#9. 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:
#10. 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?
#11. ‘Night Effect’ which causes loss of signal and fading, resulting in bearing errors from NDB transmissions, is due to:
#12. Quadrantal errors associated with aircraft Automatic Direction Finding (ADF) equipment are caused by:
#13. Errors caused by the effect of coastal refraction on bearings at lower altitudes are maximum when the NDB is:
#14. What is the wavelength of an NDB transmitting on 375 kHZ?
#15. Which of the following is likely to have the greatest effect on ADF accuracy?
#16. ADF bearings by an aeroplane by day within the published protection range should be accurate to within a maximum error of:
#17. Which of the following is the ICAO allocated frequency band for ADF receivers?
#18. In order to obtain an ADF bearing the:
#19. Factors liable to affect most NDB/ADF system performance and reliability include:
#20. Which one of the following disturbances is most likely to cause the greatest inaccuracy in ADF bearings?
#21. The BFO selector on an ADF receiver is used to:
#22. An NDB transmits a signal pattern in the horizontal plane which is :
#23. Transmissions from VOR facilities may be adversely affected by:
#24. If VOR bearing information is used beyond the published protection range, errors could be caused by:
#25. An aircraft is 100 NM from a VOR facility. Assuming no error when using a deviation indicator where 1 dot = 2° deviation, how many dots deviation from the centre line of the instrument will represent the limits of the airway boundary? (Assume that the airway is 10 NM wide)
#26. An airway 10 NM wide is to be defined by two VORs each having a resultant bearing accuracy of plus or minus 5.5°. In order to ensure accurate track guidance within the airway limits the maximum distance apart for the transmitter is approximately:
#27. An aircraft is required to approach a VOR via the 104° radial. Which of the following settings should be made on the VOR/ILS deviation indicator?
#28. 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:
#29. 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:
#30. The VOR system is limited to about 1° of accuracy. One degree at 200 NM represents a width of:
#31. An aircraft is flying on the true track 090° towards a VOR station located near the equator where the magnetic variation is 15°E. The variation at the aircraft position is 8°E.The aircraft is on VOR radial:
#32. Given:Magnetic heading 280°VOR radial 090°What bearing should be selected on the omni-bearing selector in order to centralise the VOR deviation needle with a “”TO”” indication?
#33. A VOR is sited at position 58°00’N 073°00’W where the magnetic variation equals 32°W.An aircraft is located at position 56°00’N 073°00’W where the magnetic variation equals 28°W.The aircraft is on VOR radial:
#34. The principle used in VOR bearing measurement is:phase comparison
#35. Which frequency band is used by VOR transmissions?
#36. In order to plot a bearing from a VOR station, a pilot needs to know the magnetic variation:
#37. An aircraft is required to approach a VOR station via the 244° radial. In order to obtain correct sense indications the deviation indicator should be set to:
#38. What is the maximum theoretical range that an aircraft at FL150 can receive signals from a VOR situated 609 feet above MSL?
#39. An RMI slaved to a remote indicating compass has gone unserviceable and is locked on to a reading of 090°. The tail of the VOR pointer shows 135°. The available information from the VOR is:Radial 135°, relative bearing unknown
#40. Which of the following statements concerning the variable, or directional, signal of a conventional VOR is correct?
#41. The maximum theoretical range at which an aircraft at FL230 may receive signals from a VOR facility sited at mean sea level is:
#42. If an aircraft flies along a VOR radial it will follow a:
#43. An aircraft at 6400 FT will be able to receive a VOR groundstation at 100 FT above MSL at an approximate maximum range of :
#44. An aircraft at FL 100 should be able to receive a VOR groundstation at 100 FT above MSL at an approximate maximum range of :
#45. The maximum theoretical range at which an aircraft at FL210 may receive signals from a VOR facility sited 340 feet above mean sea level is approximately:
#46. In which frequency band do VOR transmitters operate?
#47. The two signals transmitted by a conventional VOR ground station are 90° out of phase on magnetic:
#48. An aircraft is flying on a heading of 270°(M). The VOR OBS is also set to 270° with the full left deflection and FROM flag displayed. In which sector is the aircraft from the VOR ground station?
#49. An Omni-bearing selector (OBS) shows full deflection to the left when within range of a serviceable VOR. What angular deviation are you from the selected radial?
#50. An aircraft is on radial 120 with a magnetic heading of 300°, the track selector (OBS) reads : 330. The indications on the Course Deviation Indicator (CDI) are ‘fly’:
#51. Given: Course Deviation Indicator (CDI) for a VOR is selected to 090°.From/To indicator indicates “”TO””.CDI needle is deflected halfway to the right.On what radial is the aircraft?
#52. The frequency range of a VOR receiver is :
#53. If the reference phase differs 30° with the variable phase the radial from the VOR station will be :330°
#54. Given:VOR station position N61° E025°, variation 13°E,Estimated position of an aircraft N59° E025°, variation 20°E.What VOR radial is the aircraft on?
#55. The captain of an aircraft flying at FL100 wishes to obtain weather information at the destination airfield from the airfield’s VOR. At what maximum theoretical range will it be possible to obtain this information?
#56. Given:Aircraft heading 160°(M),Aircraft is on radial 240° from a VOR,Selected course on HSI is 250°.The HSI indications are deviation bar:
#57. A DME station is located 1000 feet above MSL. An aircraft flying at FL 370, 15 NM away from the DME station, will have a DME reading of:
#58. Which of the following will give the most accurate calculation of aircraft ground speed?
#59. In which situation will speed indications on an airborne Distance Measuring Equipment (DME) most closely represent the groundspeed of an aircraft flying at FL400?
#60. The time taken for the transmission of an interrogation pulse by a Distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 2000 micro-second. The slant range from the ground transponder was:
#61. An aircraft DME receiver does not lock on to its own transmissions reflected from the ground because:
#62. The DME (Distance Measuring Equipment) operates within the following frequencies:
#63. A DME is located at MSL.An aircraft passing vertically above the station at flight level FL 360 will obtain a DME range of approximately:
#64. 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:
#65. A typical frequency employed in Distance Measuring Equipment (DME) is:
#66. Distance Measuring Equipment (DME) operates in the:
#67. For a conventional DME facility ‘Beacon Saturation’ will occur whenever the number of simultaneous interrogations exceeds:
#68. On a DME, display counters rotating throughout their range indicates:
#69. The aircraft DME receiver is able to accept replies to its own transmissions and reject replies to other aircraft interrogations because:
#70. The aircraft DME receiver cannot lock on to interrogation signals reflected from the ground because:
#71. The design requirements for DME stipulate that, at a range of 100 NM, the maximum systematic error should not exceed:
#72. ICAO specifications are that range errors indicated by Distance Measuring Equipment (DME) should not exceed:
#73. What is the maximum distance between VOR and DME/TACAN ground installations if they are to have the same morse code identifier?
#74. A DME in tracking mode subsequently experiences a reduction in signal strength will switch the equipment in the first instance to:
#75. Of what use, if any, is a military TACAN station to civil aviation ?
#76. A DME that has difficulty obtaining a “”lock-on””:(NOTE: PRF = pulse recurrence frequency, PPS = pulses per second)
#77. A VOR and DME are co-located.You want to identify the DME by listening to the callsign.Having heard the same callsign 4 times in 30 seconds the:
#78. The amplitude modulation and the colour of an outer marker (OM) is:
#79. A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to:
#80. The reason why pre take-off holding areas are sometimes further from the active runway when ILS Category 2 and 3 landing procedures are in progress than during good weather operations is:
#81. An aircraft tracking to intercept the Instrument Landing System (ILS) localiser inbound on the approach side, outside the published ILS coverage angle:
#82. The MIDDLE MARKER of an Instrument Landing System (ILS) facility is identified audibly and visually by a series of:
#83. The OUTER MARKER of an Instrument Landing System (ILS) facility transmits on a frequency of:
#84. What approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 120 kt?
#85. 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:
#86. What is the approximate angular coverage of reliable navigation information for a 3° ILS glide path out to a distance of 10 NM?1.35° above the horizontal to 5.25° above the horizontal and 8° each side of the localiser centreline
#87. ILS is subject to false glide paths resulting from:
#88. What is the colour sequence when passing over an Outer, Middle and Inner Marker beacon?
#89. An aircraft carrying out an ILS approach is receiving more 90 Hz than 150 Hz modulation notes from both the localiser and glidepath transmitters. The ILS indication will show:
#90. An aircraft carrying out a 3° glidepath ILS approach experiences a reduction in groundspeed from 150 kt at the outer marker to 120 kt over the threshold. The effect of this change in groundspeed on the aircraft’s rate of descent will be a decrease of approximately:
#91. The principle of operation of an ILS localiser transmitter is based on two overlapping lobes that are transmitted on (i)………. frequencies and carry different (ii)……….
#92. In which frequency band does an ILS glide slope transmit?
#93. Assuming a five dot display, what does each of the dots on either side of the ILS localizer cockpit display represent :
#94. Outer marker transmits on 75 MHz and has an aural frequency of:
#95. Every 10 kt decrease in groundspeed, on a 3° ILS glidepath, will require an approximate:
#96. Instrument Landing Systems (ILS) Glide Paths provide azimuth coverage (i) ………. ° each side of the localiser centre-line to a distance of (ii) ………. NM from the threshold.
#97. The rate of descent required to maintain a 3.25° glide slope at a groundspeed of 140 kt is approximately:
#98. Where, in relation to the runway, is the ILS localiser transmitting aerial normally situated?
#99. A Cat III ILS glidepath transmitter provides reliable guidance information down to:
#100. Which of the following is an ILS localiser frequency?
