Question Bank

1. The maximum theoretical range at which an aircraft at FL80 can obtain bearings from a ground VDF facility sited 325 FT above MSL is

2. A frequency of 295 KHz would be described as

3. As a radio signal increases in frequency, ionospheric refraction ... and atmospheric attenuation

4. To establish and maintain effective HF communications the frequency used at a given range

5. VOR wavelength is

6. When is fading in the medium frequency band most likely to occur

7. The wavelength of a 121.95 MHz signal is?

8. The rate of refraction of a radio wave which occurs within the ionosphere

9. What is the wavelength and waveband of a radio aid that uses a frequency of 19 cm

10. In sky wave propagation the distance between the end of the surface wave and the first returning sky wave is called the

11. For a given HF frequency skip distance will normally

12. The frequency which corresponds to a wavelength of 12 mm is

13. For a given set of ionosphere conditions, as the frequency of an HF signal is increased

14. Which radio frequency employs the refraction properties of the ionosphere?

15. What is skip distance?

16. VOR wavelenght is?

17. 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?

18. The rate of attenuation of a radio wave which occurs when the wave travels close to the Earths surface

19. Around a radiating transmitter aerial there is

20. The frequency corresponding to a wavelength of 3.5 cm is

21. Atmospheric ducting close to the earth, is most likely?

22. What is the metric distance of an NDB wavelength?

23. Weather radar is?

24. Sky waves are not likely to occur by day or night in whihc of the following frequency bands

25. The wavelength of VHF radio signal is?

26. The wavelenght of I L S localizer is

27. What is the first returning sky wave called?

28. In an amplitude modulated signal, the amplitude of the carrier wave will