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Questions for ADF

Answer the following questions

1. In order to resolve the 180° directional ambiguity of a directional LOOP aerial its polar diagram is combined with that of a SENSE aerial ................................ to produce a............... whose single null ensures the ADF needle moves the shortest distance to indicate the correct................
2. When flying over the sea and using an inland NDB to fix position with a series of position lines, the plotted position in relation to the aircraft's actual position will be
3. The ADF of an aircraft on a heading of 189°(T) will experience the greatest effect due to Quadrantal Error if the NDB bears
4. The BFO facility on ADF equipment should be used as follows when an NDB having NON A1A type emission is to be used
5. The magnitude of the error in position lines derived from ADF bearings that are affected by coastal refraction may be reduced by
6. Each NDB has a range promulgated in the COMM section of the Air Pilot. Within this range interference from other NDBs should not cause bearing errors in excess of
7. When the induced signals from the loop and the sense antenna are combined in an ADF receiver, the resultant polar diagram is
8. The range promulgated in the Air Pilot and flight guides for all NDBs in the UK is the range
9. In order to Tune, Identify and Monitor NON A1A NDB emissions the BFO should be used as follows
10. The overall accuracy of ADF bearings by day within the Promulgated Range (DOC) is
11. The protection ratio afforded to NDBs in the UK within the Promulgated range(DOC) applies
12. An aircraft is intending to track from NDB ‘ A' to NDB ‘B' on a track of 050° (T), heading 060° (T). If the RBI shows the relative bearing of ‘ A' to be 180° and the relative bearing of ‘B' to be 330° then the aircraft is
13.
An aircraft has an RMI with two needles. Assume that: i) The aircraft is outbound from NDB Y on a track of 126°(M) drift is 140° Port. ii) A position report is required when crossing a QDR of 022 from NDB Z. Which of the diagrams below represents the RMI at the time of crossing the reporting point?
14. The phenomenon of coastal refraction which affects the accuracy of ADF bearings
15. In an ADF system, night effect is most pronounced
16. The principal propagation path employed in an NDB/ADF system is
17. The phenomena of coastal refraction affecting ADF bearings is caused by the signal _______ when it reaches the coastline and bending _______ the normal to the coast:
18. ADF Quadrantal Error is caused by
19. The Protection Ratio of 3:1 that is provided within the Promulgated range/Designated Operational Coverage of an NDB by day cannot be guaranteed at night because of
20. An aircraft on a heading of 235°(M) shows an RMI reading of 090° with respect to an NDB. Any quadrantal error which is affecting the accuracy of this bearing is likely to be
21.
An aircraft is tracking away from an NDB on a track of 023°(T). If the drift is 8° port and variation 10° west, which of the RMIs illustrated below shows the correct indications?