Practice Exam

Element 4: Extra

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E6F01

1. What is photoconductivity?

E1D05

2. What class of licensee is authorized to be the control operator of a space station?

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E6A01

3. In what application is gallium arsenide used as a semiconductor material in preference to germanium or silicon?

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E9D09

4. What is the function of a loading coil used as part of an HF mobile antenna?

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E9E06

5. What is the equivalent lumped-constant network for a hairpin matching system of a3-element Yagi?

E1C09

6. Which of these ranges of frequencies is available for an automatically controlled repeater operating below 30 MHz?

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E6E02

7. Which of the following device packages is a through-hole type?

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E5B03

8. What happens to the phase angle of a reactance when it is converted to a susceptance?

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E7F03

9. What type of digital signal processing filter is used to generate an SSB signal?

E1E03

10. What is a Volunteer Examiner Coordinator?

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E7E07

11. What is meant by the term baseband in radio communications?

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E4C05

12. What does a value of -174 dBm/Hz represent with regard to the noise floor of a receiver?

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E9C14

13. How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?

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E9H02

14. Which is generally true for low band (160 meter and 80 meter) receiving antennas?

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E5A05

15. What is the magnitude of the current at the input of a series RLC circuit as the frequency goes through resonance?

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Figure

E9B03

16. In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio?

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E4B03

17. If a frequency counter with a specified accuracy of +/- 1.0 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

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E4E06

18. What is a major cause of atmospheric static?

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E2D01

19. Which of the following digital modes is especially designed for use for meteor scatter signals?

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E2C08

20. Which of the following contacts may be confirmed through the U.S. QSL bureau system?

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E7G12

21. What is an integrated circuit operational amplifier?

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E2A11

22. What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?

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E7D11

23. What circuit element is controlled by a series analog voltage regulator to maintain a constant output voltage?

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E8B06

24. What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?

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E2B02

25. How many horizontal lines make up a fast-scan (NTSC) television frame?

E1A05

26. What is the maximum power output permitted on the 60 meter band?

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E4D10

27. What does a third-order intercept level of 40 dBm mean with respect to receiver performance?

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E8A07

28. What determines the PEP-to-average power ratio of a single-sideband phone signal?

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E7C08

29. Which of the following factors has the greatest effect in helping determine the bandwidth and response shape of a crystal ladder filter?

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E5D01

30. What is the result of skin effect?

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E7B02

31. What is a Class D amplifier?

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E2E06

32. What is the most common data rate used for HF packet?

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E3B07

33. Which of the following could account for hearing an echo on the received signal of a distant station?

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E4A09

34. When using a computer's soundcard input to digitize signals, what is the highest frequency signal that can be digitized without aliasing?

E1F12

35. Who may be the control operator of an auxiliary station?

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Figure

E6C10

36. In Figure E6-5, what is the schematic symbol for a NOR gate?

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Figure

E9G06

37. On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?

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E9A10

38. Which of the following choices is a way to improve the efficiency of a ground-mounted quarter-wave vertical antenna?

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E0A02

39. When evaluating RF exposure levels from your station at a neighbor's home, what must you do?

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E9F09

40. What is the approximate physical length of a solid polyethylene dielectric coaxial transmission line that is electrically one-quarter wavelength long at 7.2 MHz?

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E8C09

41. Which is the name of a digital code where each preceding or following character changes by only one bit?

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E7A12

42. What type of logic defines "0" as a high voltage?

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E7H03

43. How is positive feedback supplied in a Hartley oscillator?

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E8D05

44. What is the most common method of reducing key clicks?

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E6D03

45. Which of the following is an aspect of the piezoelectric effect?

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E5C06

46. What does the impedance 50-j25 represent?

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E3A03

47. When scheduling EME contacts, which of these conditions will generally result in the least path loss?

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E3C07

48. Which of the following descriptors indicates the greatest solar flare intensity?

E1B05

49. What is the National Radio Quiet Zone?

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E6B09

50. What is a common use for point contact diodes?