ADF/NDB | Limitations

Question 1

Local thunderstorm activity is likely to cause the ___ inaccuracy

Answer 1

greatest

Question 2

As a result of night effect, the needle will ___

Answer 2

swing erratically

Question 3

Night effect is strongest ___

Answer 3

just after sunset and just before sunrise

Question 4

As a result of night effect, waves will change their ___ when reflecting off the ionosphere.

Answer 4

polarisation

Question 5

Night effect is no an issue for low power beacons, as they only produce ___ ___

Answer 5

ground waves

Question 6

An indication of night effect on the ADF is an ____ needle and a ___ audio signal

Answer 6

unsteady, fading

Question 7

Station overlap occurs when NDBs ____

Answer 7

have the same frequency

Question 8

Station overlap is more pronounced at ___

Answer 8

night

Question 9

Station overlap has the greatest effect on NDB ___

Answer 9

accuracy

Question 10

Mountain effect is caused by ____

Answer 10

reflections from high ground

Question 11

Quadrantal error is caused by ___

Answer 11

variations from the aircraft.

Question 12

The greatest quadrantal error lies at __ degrees

Answer 12

45

Question 13

Radio waves travel faster over ___

Answer 13

water

Question 14

Coastal refraction will make your aircraft appear ___ to the shore

Answer 14

nearer

Question 15

Coastal refraction is most noticeable at less than __ degrees to the coastline, with ___ frequencies

Answer 15

30, lower

Question 16

Coastal refraction is greater when the beacon is ___

Answer 16

further away

Question 17

Altitude has an/no effect on coastal refraction

Answer 17

an

Question 18

There is no coastal refraction at __ degrees

Answer 18

90

Question 19

Coastal refraction is reduced when the NDB is ___ the coast

Answer 19

near