RADNAV-RH-CHAPTER2-NDB

1. 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:




2. NDB operate in the:




3. When converting VOR and ADF bearings to true, the variation at the (i) should be used for VOR and at the (ii) for ADF:




4. The allocated coverage of NDBs is:




5. NDBs transmit mainly in the:




6. When receiving an NDB signal on an ADF receiver the BFO can be selected OFF for the:




7. Which of the following may cause inaccuracies in ADF bearings?




8. An aircraft is HOMING to a radio beacon whilst maintaining a relative bearing of zero. If the magnetic heading decreases, the aircraft is experiencing:




9. Using an NDB it is possible to experience which of the following errors or limitations?




10. With a transmission from an NDB aerial, the ___ component travels in the ___ plane and the signal is ___ polarised.




11. The BFO selector on an ADF receiver is used to:




12. When considering the propagation of ADV transmissions night effect is most pronounced:




13. In order to obtain an ADF bearing the:




14. An NDB signal crossing from land to sea will ___ speed and bend ___ the normal.




15. Errors caused by the effect of coastal refraction on bearings at lower altitudes are maximum when the NDB is:




16. Which one of the following disturbances is most likely to cause the greatest inaccuracy in ADF bearings?




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




18. The accuracy of ADF within the DOC by day is:




19. The D layer of the ionosphere affects the accuracy of NDB bearings:




20. 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:




21. The signal to noise ratio for an NDB is ___ allowing a maximum error of ___ on 95% of occasions during ___




22. When is coastal error at its worst for an aircraft at low level?




23. 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?




24. Which of the following is likely to have the greatest effect on ADF accuracy?




25. 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 plotted by an aircraft that is over water will be:




26. An ADF uses a sense aerial to:




27. The BFO:




28. What is the role of a ground direction finder?




29. With regard to the following types of NDB which statements is correct?




30. 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:




31. A cumulonimbus cloud in the vicinity of an aeroplane can cause certain navigation systems to give false indications. This is particularly true of the:




32. 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:




33. In order to obtain an ADF bearing on a system using sense and loop aerials, the:




34. 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?




35. The BFO selector switch on the ADF control panel must be in the ‘on’ position to enable the pilot to:




36. 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:




37. What according to ICAO Annex 10 is the range of a locator?




38. What actually happens in the ADF receiver when the BFO position is selected?




39. Which of the following is correct regarding the range of an NDB?




40. You are on a magnetic heading of 055o and your ADF indicates a relative bearing of 325o. The QDM is:




41. What gives the greatest error in ADF:




42. The nominal maximum range of an NDB ith a transmitter power is 200 watts is:




43. The ICAO allocated band of frequencies for NDB is:




44. 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:




45. Using an ADF loop aerial the maximum signal will be received when:




46. When identifying an NDB (NON A1A) it is necessary to:




47. Which of the following are all errors associated with ADF:




48. What action must be taken to receive a bearing from an ADF:




49. Which of the following is the most significant error in ADF:




50. When using ADF (i), the accuracy is (ii) than iii), because the surface wave is (iv):




51. Snow will affect ADF by:




52. Do all ADF systems have a sense aerial:




53. If an NDB signal is received at a range of 1000 nm:




54. 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




55. When considering the use of NDB, night effect has its greatest effect during:




56. 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):




57. 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:




58. 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?




59. What antennae must be used to obtain an ADF bearing?




60. For long range NDB’s the most common type is:




61. The 95% accuracy for ADF bearings of an NDB by day is:




62. A radio beacon has range of 10 nm. By what factor should the power be increased to achieve a range of 20 nm?




63. A NDB transmits a signal pattern which is:




64. The frequency band chosen for NDB’s is:




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




66. Factors liable to affect most NDB/ADF system performance and reliability include:




67. 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:




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




69. 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?




70. Which of the following factors could cause an error of an ADV bearing of an NDB?




71. Night Effect which causes loss of signal and fading, resulting in bearing errors from NDB transmissions, is due to:




72. 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:




73. The purpose of the BFO switch on the ADF receiver is to:




74. A long range NDB is likely to transmit on ___ and be classified as ___ Select the answer to complete this statement




75. The nominal maximum range of an NDB with a transmitter power is 200 watts is:




76. An aeroplane is flying parallel to a coast. Which of the following NDBs will give the greatest costal refraction LOP error?




77. Which of the following is true about the ADF?




78. What is the approved frequency band assigned to aeronautical NDBs?




79. An NDB aerial is (i) so as to ensure the range is (ii) by minimising (iii) due to (iv):




80. ADF bearings by an aeroplane by day within the published protection range should be accurate to within a maximum error of:




81. 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:




82. In accordance with Doc 8168, a pilot flying an NDB approach must achieve a tracking accuracy within ___ of the published approach track.




83. Which combination gives the greatest reduction in reliability of ADF:




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