Practice Exam

Element 4: Extra

E2D10

1. What does the packet path WIDE3-1 designate?

E4C09

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

E7E01

3. Which of the following can be used to generate FM phone signals?

E3B05

4. Which of the following paths is most likely to support long-distance propagation on 160 meters?

E3C04

5. What does the value of Bz (B sub z) represent?

E5D05

6. What parasitic characteristic causes electrolytic capacitors to be unsuitable for use at RF?

E9A09

7. What is antenna efficiency?

E4A05

8. What is the purpose of using a prescaler with a frequency counter?

E8C14

9. What type of addresses do nodes have in a mesh network?

E7F08

10. What is the function of decimation?

E2B05

11. Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?

E9C01

12. What type of radiation pattern is created by two 1/4-wavelength vertical antennas spaced 1/2- wavelength apart and fed 180 degrees out of phase?

Figure

E6C11

13. In Figure E6-3, which is the schematic symbol for the NOT operation (inversion)?

E7G06

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

E6B01

15. What is the most useful characteristic of a Zener diode?

E4B08

16. Which of the following can be used to determine the Q of a series-tuned circuit?

E8B07

17. Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?

E0A10

18. When must an RF exposure evaluation be performed on an amateur station operating on 80 meters?

E1F10

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

E9G04

20. What are the two families of circles and arcs that make up a Smith chart?

E6A01

21. In what application is gallium arsenide used as a semiconductor material?

E2C12

22. What indicates the delay between a control operator action and the corresponding change in the transmitted signal?

E9H05

23. What challenge is presented by a small wire-loop antenna for direction finding?

E1B05

24. What is the National Radio Quiet Zone?

Figure

E7B11

25. In Figure E7-1, what is the purpose of R3?

E2E09

26. Which of the following HF digital modes uses variable-length character coding?

E7C09

27. What is a crystal lattice filter?

E7D03

28. What device is used as a stable voltage reference?

E3A02

29. What characterizes libration fading of an EME signal?

E9D11

30. Why do most two-element Yagis with normal spacing have a reflector instead of a director?

E5B09

31. What is the relationship between the AC current through a capacitor and the voltage across a capacitor?

E9F09

32. What impedance does a 1/4-wavelength transmission line present to an RF generator when the line is shorted at the far end?

E6D02

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

E7H05

34. How is positive feedback supplied in a Pierce oscillator?

E7A06

35. What is a characteristic of a monostable multivibrator?

E8A03

36. Which of the following describes a signal in the time domain?

E1D01

37. What is the definition of telemetry?

E4E12

38. What causes interference received as a series of carriers at regular intervals across a wide frequency range?

E5A10

39. What is the resonant frequency of an RLC circuit if R is 33 ohms, L is 50 microhenries, and C is 10 picofarads?

E1E09

40. What may be the penalty for a VE who fraudulently administers or certifies an examination?

E1C09

41. What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?

E4D13

42. What is the received signal level with a transmit power of 10 W (+40 dBm), a transmit antenna gain of 6 dBi, a receive antenna gain of 3 dBi, and a path loss of 100 dB?

E9E05

43. What Yagi driven element feed point impedance is required to use a beta or hairpin matching system?

E1A03

44. What is the highest legal carrier frequency on the 20-meter band for transmitting a 2.8 kHz wide USB data signal?

Figure

E9B06

45. What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?

E6E10

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

E2A12

47. What is the purpose of digital store-and-forward functions on an amateur radio satellite?

E5C05

48. What kind of diagram is used to show the phase relationship between impedances at a given frequency?

E6F09

49. What is the efficiency of a photovoltaic cell?

E8D09

50. What is considered an acceptable maximum IMD level for an idling PSK signal?