Practice Exam

Element 4: Extra

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

E5A01

1. What can cause the voltage across reactances in series to be larger than the voltage applied to them?

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

E2B08

2. Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television?

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

E9D05

3. What is a disadvantage of using a multiband trapped antenna?

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

E9F16

4. Which of the following is a significant difference between foam dielectric coaxial cable and solid dielectric cable, assuming all other parameters are the same?

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E7G05

5. How can unwanted ringing and audio instability be prevented in a multi-section op-amp RC audio filter circuit?

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E7F08

6. What is the function of decimation with regard to digital filters?

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E9E10

7. 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?

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E4B08

8. Which of the following is a characteristic of a good DC voltmeter?

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E8D09

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

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E3C11

10. What does VOACAP software model?

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E9G02

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

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E8C07

12. What is the necessary bandwidth of a 4800-Hz frequency shift, 9600-baud ASCII FM transmission?

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E6D12

13. What is the definition of saturation in a ferrite core inductor?

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E6A04

14. What is the name given to an impurity atom that adds holes to a semiconductor crystal structure?

E1A12

15. With your transceiver displaying the carrier frequency of CW signals, you hear a DX station's CQ on 3.500 MHz. Is it legal to return the call using CW on the same frequency?

E1E03

16. What is a Volunteer Examiner Coordinator?

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E8A12

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

E1F01

18. On what frequencies are spread spectrum transmissions permitted?

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E8B05

19. What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?

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

E6C12

20. What is BiCMOS logic?

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E2D10

21. How can an APRS station be used to help support a public service communications activity?

E1C09

22. Which of these ranges of frequencies is available for an automatically controlled repeater operating below 30 MHz?

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

E4E13

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

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E4D13

24. Which of the following can cause receiver desensitization?

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E7C09

25. What is a Jones filter as used as part of an HF receiver IF stage?

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E3A07

26. Atmospheric ducts capable of propagating microwave signals often form over what geographic feature?

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E2E09

27. Which of the following HF digital modes uses variable-length coding for bandwidth efficiency?

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E2C09

28. What type of equipment is commonly used to implement a ham radio mesh network?

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E9H08

29. What is the function of a sense antenna?

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E0A06

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

E1D06

31. Which of the following is a requirement of a space station?

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

E4A02

32. Which of the following parameters would a spectrum analyzer display on the vertical and horizontal axes?

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E7E05

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

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E5C11

34. What do the two numbers that are used to define a point on a graph using rectangular coordinates represent?

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E2A04

35. What is meant by the term mode as applied to an amateur radio satellite?

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E9A08

36. What is meant by antenna bandwidth?

E1B08

37. 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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Figure

E9B01

38. In the antenna radiation pattern shown in Figure E9-1, what is the 3 dB beam-width?

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E4C02

39. Which of the following portions of a receiver can be effective in eliminating image signal interference?

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E6E10

40. What is the packaging technique in which leadless components are soldered directly to circuit boards?

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E7B16

41. What is the effect of intermodulation products in a linear power amplifier?

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E6F14

42. Which of the following is true of LCD displays?

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E7A08

43. What logical operation does an OR gate perform?

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E5D06

44. In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?

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E3B14

45. What happens to linearly polarized radio waves that split into ordinary and extraordinary waves in the ionosphere?

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E7D15

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

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

E5B07

47. 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?

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

E6B12

48. What is one common use for PIN diodes?

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

E9C05

49. What is an OCFD antenna?

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

E7H15

50. Which of these functions can be performed by a phase-locked loop?