Practice Exam

Element 4: Extra

Study material for this question can be found in the following resources:

E6E09

1. Which of the following component package types would be most suitable for use at frequencies above the HF range?

E1E01

2. What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?

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Figure

E7G11

3. What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 3300 ohms and RF is 47 kilohms?

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E5D02

4. Why is it important to keep lead lengths short for components used in circuits for VHF and above?

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E5B08

5. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 100 ohms, R is 100 ohms, and XL is 75 ohms?

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E3B10

6. What is the cause of gray-line propagation?

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E5A02

7. What is resonance in an electrical circuit?

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E9H08

8. What is the function of a sense antenna?

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E9C10

9. Which of the following describes a Zepp antenna?

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E6C04

10. What is the primary advantage of tri-state logic?

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E4A11

11. Which of the following is good practice when using an oscilloscope probe?

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E4B07

12. What do the subscripts of S parameters represent?

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E5C02

13. How are impedances described in polar coordinates?

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E8A12

14. What is an advantage of using digital signals instead of analog signals to convey the same information?

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E2C07

15. What is the Cabrillo format?

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E9A17

16. What is the effective radiated power of a repeater station with 200 watts transmitter power output, 2 dB feed line loss, 2.8 dB duplexer loss, 1.2 dB circulator loss, and 7 dBi antenna gain?

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E4D13

17. Which of the following can cause receiver desensitization?

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E2B15

18. What signals SSTV receiving equipment to begin a new picture line?

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E9E11

19. What is an effective way of matching a feed line to a VHF or UHF antenna when the impedances of both the antenna and feed line are unknown?

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E7A04

20. How many flip-flops are required to divide a signal frequency by 4?

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E9F14

21. What impedance does a 1/2 wavelength transmission line present to a generator when the line is shorted at the far end?

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E4C07

22. What does the MDS of a receiver represent?

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E2D04

23. What is the purpose of digital store-and-forward functions on an Amateur Radio satellite?

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E8C09

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

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E3C09

25. How does the intensity of an X3 flare compare to that of an X2 flare?

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E7D15

26. What is the purpose of a "step-start" circuit in a high voltage power supply?

E1A13

27. Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?

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E0A06

28. Why are there separate electric (E) and magnetic (H) field MPE limits?

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E2A08

29. Why should effective radiated power to a satellite which uses a linear transponder be limited?

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E8D01

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

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E7E07

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

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E7B05

32. What can be done to prevent unwanted oscillations in an RF power amplifier?

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E7H09

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

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E9B11

34. What is a disadvantage of decreasing the number of wire segments in an antenna model below the guideline of 10 segments per half-wavelength?

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E6A09

35. What is a depletion-mode FET?

E1B08

36. What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receivers involved are of good engineering design?

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E1C04

37. What is meant by IARP?

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E9D01

38. How does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?

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E7F04

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

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E4E16

40. What current flows equally on all conductors of an unshielded multi-conductor cable?

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E6F07

41. What is a solid state relay?

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E7C10

42. Which of the following filters would be the best choice for use in a 2 meter repeater duplexer?

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E8B09

43. What is meant by deviation ratio?

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E2E11

44. What is the difference between direct FSK and audio FSK?

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E6D03

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

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E9G09

46. What third family of circles is often added to a Smith chart during the process of solving problems?

E1D11

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

E1F08

48. Which of the following types of amateur station communications are prohibited?

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E3A01

49. What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by Moon bounce?

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E6B08

50. Which of the following describes a type of semiconductor diode?