Radio Aids

Question 1

ADF stands for

Answer 1

Automatic direction finding

Question 2

NDB stands for

Answer 2

Non directional beacon

Question 3

Non directional beacon operate in low to medium frequency bands ranging from ________khz to ________ khz.

Answer 3

200 khz to 400 khz

Question 4

The performance of NDB or ADF equipment can be degraded by interference from….

Answer 4

Night effect
Thunderstorm effect
Co channel interference
Mountsin effect
Coastal refraction
Quadrantal error

p276

Question 5

What is ADF equipment?

Answer 5

The automatic direction finding equipment is the airbourne component whic receives ground waves from non directional beacons.

Question 6

The rated coverages of NDBs vary from as little as ____ nm for low power transmitters up to ____ nm for major airports.

Answer 6

30 nm + 500 nm

Question 7

The present heading is 180°M and the ADF indicates a relative bearing to the station of 350°R. What is the present track to the station ?

Answer 7

180° + 350° = 530°

because answer is greater than 360 subtract it

530 - 360 = 170°M

Question 8

VOR stands for….

Answer 8

VHF Omnidirectional Range

Question 9

CDI stands for….

Answer 9

course deviation indicator

Question 10

OBS stands for…..

Answer 10

Omni-Bearing Selector