Practice Exam

Element 4: Extra

E8B02

1. How does the modulation index of a phase-modulated emission vary with RF carrier frequency?

E6E11

2. What is a characteristic of DIP packaging used for integrated circuits?

E7A07

3. What logical operation does a NAND gate perform?

E4E10

4. What might be the cause of a loud roaring or buzzing AC line interference that comes and goes at intervals?

E5A11

5. What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?

E5C06

6. What does the impedance 50-j25 represent?

E2A09

7. What do the terms "L band" and "S band" specify regarding satellite communications?

E7H09

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

E3C03

9. Which of the following signal paths is most likely to experience high levels of absorption when the A index or K index is elevated?

Figure

E9G07

10. On the Smith chart shown in Figure E9-3, what is the only straight line shown?

Figure

E6C08

11. In Figure E6-3, what is the schematic symbol for a NAND gate?

E2E06

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

E9H08

13. What is the function of a sense antenna?

E6D03

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

E7B04

15. Where on the load line of a Class A common emitter amplifier would bias normally be set?

E3A11

16. What is a typical range for tropospheric propagation of microwave signals?

E4A05

17. What is the purpose of the prescaler function on a frequency counter?

E1B01

18. Which of the following constitutes a spurious emission?

E1E08

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

E2B11

20. What is the function of the Vertical Interval Signaling (VIS) code sent as part of an SSTV transmission?

E9C14

21. 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?

E7G06

22. What is the gain-bandwidth of an operational amplifier?

E2C12

23. What technique do individual nodes use to form a mesh network?

E7D02

24. What is a characteristic of a switching electronic voltage regulator?

E6A08

25. What term indicates the frequency at which the grounded-base current gain of a transistor has decreased to 0.7 of the gain obtainable at 1 kHz?

E0A01

26. What is the primary function of an external earth connection or ground rod?

E9A05

27. What is included in the total resistance of an antenna system?

E4C09

28. Which of the following choices is a good reason for selecting a high frequency for the design of the IF in a superheterodyne HF or VHF communications receiver?

E2D06

29. Which of the following describes a method of establishing EME contacts?

E1F09

30. Which of the following conditions apply when transmitting spread spectrum emissions?

E7F04

31. What is a common method of generating an SSB signal using digital signal processing?

E8C10

32. How may data rate be increased without increasing bandwidth?

E8D11

33. What is one advantage of using ASCII code for data communications?

E9F01

34. What is the velocity factor of a transmission line?

E8A02

35. Which of the following is a type of analog-to-digital conversion?

E9D05

36. What usually occurs if a Yagi antenna is designed solely for maximum forward gain?

E7E08

37. What are the principal frequencies that appear at the output of a mixer circuit?

E5B04

38. What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors, all in parallel?

E7C05

39. Which filter type is described as having ripple in the passband and a sharp cutoff?

E3B04

40. What is meant by the terms "extraordinary" and "ordinary" waves?

Figure

E9B01

41. In the antenna radiation pattern shown in Figure E9-1, what is the beamwidth?

E4B03

42. Which S parameter is equivalent to forward gain?

E9E10

43. 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?

E4D02

44. Which of the following describes problems caused by poor dynamic range in a receiver?

E1D05

45. What must be posted at the station location of a station being operated by telecommand on or within 50 km of the earth's surface?

E6B02

46. What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?

E6F01

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

E1C05

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

E5D09

49. What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?

E1A07

50. What is the maximum power permitted on the 2200 meter band?