Practice Exam

Element 4: Extra

E9C13

1. How does the radiation pattern of a horizontally polarized antenna vary with increasing height above ground?

E6B06

2. Which of the following is a common use of a Schottky diode?

E5D01

3. What is the result of conductor skin effect?

E6A06

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

E4E06

5. What type of electrical interference can be caused by computer network equipment?

E3C05

6. What orientation of Bz (B sub z) increases the likelihood that charged particles from the Sun will cause disturbed conditions?

E4C03

7. What is the term for the suppression in an FM receiver of one signal by another stronger signal on the same frequency?

E9H09

8. What type of radiation pattern is created by a single-turn, terminated loop such as a pennant antenna?

E7C03

9. What is the purpose of adding an inductor to a Pi-network to create a Pi-L-network?

E7F01

10. What is meant by "direct sampling" in software defined radios?

E1A09

11. Except in some parts of Alaska, what is the maximum power permitted on the 630-meter band?

E7E07

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

E2C03

13. From which of the following bands is amateur radio contesting generally excluded?

E4B08

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

E7B02

15. What is a Class D amplifier?

E8C04

16. What technique minimizes the bandwidth of a PSK31 signal?

E9F05

17. What is microstrip?

E4A10

18. Which trigger mode is most effective when using an oscilloscope to measure a linear power supply's output ripple?

E1B06

19. Which of the following additional rules apply if you are erecting an amateur station antenna structure at a site at or near a public use airport?

E4D12

20. What is the link margin in a system with a transmit power level of 10 W (+40 dBm), a system antenna gain of 10 dBi, a cable loss of 3 dB, a path loss of 136 dB, a receiver minimum discernable signal of -103 dBm, and a required signal-to-noise ratio of 6 dB?

E0A10

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

E2E04

22. Which of the following is characteristic of the FST4 mode?

E2B01

23. In digital television, what does a coding rate of 3/4 mean?

E6E08

24. How is power supplied to the most common type of MMIC?

Figure

E9B05

25. What type of antenna pattern is shown in Figure E9-2?

E1F10

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

E5A04

27. What is the magnitude of the impedance of a parallel RLC circuit at resonance?

Figure

E6C11

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

E7H10

29. What information is contained in the lookup table of a direct digital synthesizer (DDS)?

E6D09

30. What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of a transistor HF amplifier?

E9G04

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

E1E01

32. For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed?

E3A13

33. Which of these emission modes is best for auroral propagation?

Figure

E7D08

34. What type of circuit is shown in Figure E7-2?

E1C11

35. Which of the following operating arrangements allows an FCC-licensed US citizen to operate in many European countries, and amateurs from many European countries to operate in the US?

E2A09

36. What do the terms "L band" and "S band" specify?

E7G12

37. What is an operational amplifier?

E6F02

38. What happens to photoconductive material when light shines on it?

E1D11

39. Which amateur stations are eligible to operate as Earth stations?

E5B07

40. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 500 ohms, R is 1 kilohm, and XL is 250 ohms?

E9D08

41. What happens as the Q of an antenna increases?

E5C05

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

E9A01

43. What is an isotropic radiator?

E8B11

44. What is digital time division multiplexing?

E8D07

45. What is a common cause of overmodulation of AFSK signals?

E3B04

46. What are "extraordinary" and "ordinary" waves?

E8A06

47. What is the approximate ratio of PEP-to-average power in an unprocessed single-sideband phone signal?

E2D06

48. Which of the following is a method for establishing EME contacts?

E7A01

49. Which circuit is bistable?

E9E05

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