Practice Exam

Element 4: Extra

E6C09

1. What is a Programmable Logic Device (PLD)?

E2B06

2. What is vestigial sideband modulation?

E6E10

3. What advantage does surface-mount technology offer at RF compared to using through-hole components?

E3B03

4. What is the best time of day for transequatorial propagation?

E3A12

5. What is the cause of auroral activity?

E8D01

6. Why are received spread spectrum signals resistant to interference?

E1C05

7. When may an automatically controlled station originate third party communications?

E2A08

8. Why should effective radiated power to a satellite that uses a linear transponder be limited?

E7C02

9. Which of the following is a property of a T-network with series capacitors and a parallel shunt inductor?

E3C13

10. What type of polarization is best for ground-wave propagation?

E7F09

11. Why is an anti-aliasing digital filter required in a digital decimator?

E9F08

12. Which of the following is a significant difference between foam dielectric coaxial cable and solid dielectric cable, assuming all other parameters are the same?

E8B05

13. What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?

E7A05

14. Which of the following is a circuit that continuously alternates between two states without an external clock?

E4E07

15. Which of the following can cause shielded cables to radiate or receive interference?

E1F03

16. Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?

E4D12

17. What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?

E8A03

18. What type of wave does a Fourier analysis show to be made up of sine waves of a given fundamental frequency plus all its harmonics?

E9E10

19. Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?

Figure

E6B10

20. In Figure E6-2, what is the schematic symbol for a light-emitting diode?

E7H09

21. What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital to analog converter, and a low-pass anti-alias filter?

E7E04

22. What is one way a single-sideband phone signal can be generated?

E7D13

23. What is the equation for calculating power dissipated by a series linear voltage regulator?

E9G11

24. How are the wavelength scales on a Smith chart calibrated?

E0A04

25. When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations?

E4A02

26. Which of the following parameters does a spectrum analyzer display on the vertical and horizontal axes?

E1A08

27. If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?

E4C04

28. What is the noise figure of a receiver?

E9A10

29. Which of the following improves the efficiency of a ground-mounted quarter-wave vertical antenna?

E2C01

30. What indicator is required to be used by U.S.-licensed operators when operating a station via remote control and the remote transmitter is located in the U.S.?

E2D02

31. Which of the following is a good technique for making meteor scatter contacts?

E9H05

32. What is the main drawback of a small wire-loop antenna for direction finding?

E5B03

33. How is impedance in polar form converted to an equivalent admittance?

E9C04

34. What happens to the radiation pattern of an unterminated long wire antenna as the wire length is increased?

E4B02

35. What is the significance of voltmeter sensitivity expressed in ohms per volt?

E1D02

36. Which of the following may transmit special codes intended to obscure the meaning of messages?

E1B03

37. Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?

E5D01

38. What is the result of skin effect?

E6D02

39. What is the equivalent circuit of a quartz crystal?

E5A10

40. How is the Q of an RLC series resonant circuit calculated?

E2E06

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

E9D02

42. How can linearly polarized Yagi antennas be used to produce circular polarization?

E7B14

43. Why are switching amplifiers more efficient than linear amplifiers?

E6F01

44. What absorbs the energy from light falling on a photovoltaic cell?

E1E08

45. To which of the following examinees may a VE not administer an examination?

E8C08

46. How does ARQ accomplish error correction?

E5C06

47. What does the impedance 50-j25 represent?

E7G01

48. What is the typical output impedance of an op-amp?

E9B10

49. What is the principle of a Method of Moments analysis?

E6A06

50. What is the beta of a bipolar junction transistor?