Practice Exam

Element 4: Extra

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

E4D13

1. Which of the following can cause receiver desensitization?

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E6D11

2. How many turns will be required to produce a 1-mH inductor using a core that has an inductance index (A L) value of 523 millihenrys/1000 turns?

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E2C05

3. What is the function of a DX QSL Manager?

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

E9E11

4. 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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E6F04

5. What is the photovoltaic effect?

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E9F13

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

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E3A05

7. Tropospheric propagation of microwave signals often occurs along what weather related structure?

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E2D07

8. What digital protocol is used by APRS?

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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?

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E9G02

10. What type of coordinate system is used in a Smith chart?

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E9B14

11. What type of information can be obtained by submitting the details of a proposed new antenna to a modeling program?

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E5A14

12. What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?

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E8D09

13. What is considered a good minimum IMD level for an idling PSK signal?

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E2E03

14. How is the timing of JT65 contacts organized?

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E2A13

15. What type of satellite appears to stay in one position in the sky?

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E7B08

16. How can an RF power amplifier be neutralized?

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E6A03

17. Why does a PN-junction diode not conduct current when reverse biased?

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E7H11

18. What are the major spectral impurity components of direct digital synthesizers?

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E9C14

19. 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?

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E7C13

20. What is one advantage of a Pi-matching network over an L-matching network consisting of a single inductor and a single capacitor?

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E5D07

21. What determines the strength of the magnetic field around a conductor?

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E9A11

22. Which of the following factors determines ground losses for a ground-mounted vertical antenna operating in the 3 MHz to 30 MHz range?

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E7A03

23. Which of the following can divide the frequency of a pulse train by 2?

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E4C15

24. What is usually the primary source of noise that is heard from an HF receiver with an antenna connected?

E1F09

25. Which of the following conditions apply when transmitting spread spectrum emission?

E1B03

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

E1D05

27. What class of licensee is authorized to be the control operator of a space station?

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E4B17

28. What three test loads are used to calibrate a standard RF vector network analyzer?

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E7G03

29. What is the typical input impedance of an integrated circuit op-amp?

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E0A09

30. Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled?

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E9H01

31. When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?

E1C07

32. What is meant by local control?

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E8B04

33. What is the modulation index of an FM-phone signal having a maximum carrier deviation of plus or minus 6 kHz when modulated with a 2 kHz modulating frequency?

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E2B09

34. What hardware, other than a receiver with SSB capability and a suitable computer, is needed to decode SSTV using Digital Radio Mondiale (DRM)?

E1A13

35. 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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Figure

E6C11

36. In Figure E6-5, what is the schematic symbol for the NOT operation (inverter)?

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E6E07

37. Which of the following is typically used to construct a MMIC-based microwave amplifier?

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E7E05

38. What circuit is added to an FM transmitter to boost the higher audio frequencies?

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E5B12

39. What is admittance?

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E7D09

40. What is the main reason to use a charge controller with a solar power system?

E1E14

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

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E3B12

42. What is the primary characteristic of chordal hop propagation?

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E7F17

43. What do the letters I and Q in I/Q Modulation represent?

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E4E11

44. Which is the most likely cause if you are hearing combinations of local AM broadcast signals within one or more of the MF or HF ham bands?

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E8A07

45. What determines the PEP-to-average power ratio of a single-sideband phone signal?

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E6B05

46. What characteristic of a PIN diode makes it useful as an RF switch or attenuator?

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E9D03

47. Where should a high Q loading coil be placed to minimize losses in a shortened vertical antenna?

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

E8C06

48. What is the necessary bandwidth of a 170-hertz shift, 300-baud ASCII transmission?

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E4A03

49. Which of the following test instrument is used to display spurious signals and/or intermodulation distortion products in an SSB transmitter?

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Figure

E5C15

50. Which point in Figure E5-2 best represents the impedance of a series circuit consisting of a 300 ohm resistor and an 18 microhenry inductor at 3.505 MHz?