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. VOR wavelenght is?

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

4. Weather radar is?

5. The wavelength of VHF radio signal is?

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

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

8. What is skip distance?

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

10. Around a radiating transmitter aerial there is

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

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

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

14. The wavelength of a 121.95 MHz signal is?

15. The wavelenght of I L S localizer is

16. The frequency which corresponds to a wavelength of 12 mm 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. What is the first returning sky wave called?

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

20. For a given HF frequency skip distance will normally

21. A frequency of 295 KHz would be described as

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

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

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

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

26. VOR wavelength is

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

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