Practice Exam

Element 4: Extra (EXPIRED)

E7C03

1. What advantage does a Pi-L-network have over a Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

E6B09

2. What is a common use for point contact diodes?

E5D15

3. What is the power factor of an RL circuit having a 45 degree phase angle between the voltage and the current?

E1E06

4. Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?

E7E06

5. Why is de-emphasis commonly used in FM communications receivers?

Figure

E7D10

6. What is the purpose of C3 in the circuit shown in Figure E7-3?

E4E07

7. How can you determine if line noise interference is being generated within your home?

E7H06

8. Which of the following oscillator circuits are commonly used in VFOs?

E6D04

9. What function does a charge-coupled device (CCD) serve in a modern video camera?

E5A02

10. What is resonance in an electrical circuit?

E4D12

11. What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?

E6F07

12. What is a solid state relay?

E4C03

13. What is the term for the blocking of one FM phone signal by another, stronger FM phone signal?

E7F09

14. What is the purpose of a frequency counter?

E1A05

15. What is the maximum power output permitted on the 60 meter band?

E9C13

16. What is the main effect of placing a vertical antenna over an imperfect ground?

E6E08

17. How is power-supply voltage normally furnished to the most common type of monolithic microwave integrated circuit (MMIC)?

E3C03

18. Where in the ionosphere does Aurora activity occur?

E0A11

19. Which of the following injuries can result from using high-power UHF or microwave transmitters?

E7B18

20. Which of the following is a characteristic of a grounded-grid amplifier?

E9F09

21. What is the approximate physical length of a solid polyethylene dielectric coaxial transmission line that is electrically one-quarter wavelength long at 7.2 MHz?

E8B02

22. How does the modulation index of a phase-modulated emission vary with RF carrier frequency (the modulated frequency)?

E7G02

23. What is the effect of ringing in a filter?

E4B08

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

E5B02

25. What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial voltage?

Figure

E6A11

26. In Figure E6-2, what is the schematic symbol for a P-channel junction FET?

E1D06

27. Which of the following special provisions must a space station incorporate in order to comply with space station requirements?

E4A02

28. Which of the following parameters would a spectrum analyzer display on the horizontal axis?

E1C06

29. Which of the following statements concerning remotely controlled amateur stations is true?

E9B06

30. If the boom of a Yagi antenna is lengthened and the elements are properly retuned, what usually occurs?

E9E04

31. What is the purpose of the series capacitor in a gamma-type antenna matching network?

E5C16

32. In polar coordinates, what is the impedance of a circuit that has an admittance of 7.09 millisiemens at 45 degrees?

E8C13

33. What is one advantage of using JT-65 coding?

E8A05

34. What would be the most accurate way of measuring the RMS voltage of a complex waveform?

E9H05

35. What is the main drawback of a wire-loop antenna for direction finding?

E2C04

36. On which of the following frequencies is an amateur radio contest contact generally discouraged?

E7A15

37. What is a D flip-flop?

E9D13

38. What happens to feed point impedance at the base of a fixed-length HF mobile antenna as the frequency of operation is lowered?

E2B11

39. What is the function of the Vertical Interval Signaling (VIS) code transmitted as part of an SSTV transmission?

E2A06

40. On what band would a satellite receive signals if it were operating in mode U/V?

E1B12

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

E1F11

42. Which of the following best describes one of the standards that must be met by an external RF power amplifier if it is to qualify for a grant of FCC certification?

E2D10

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

E8D04

44. What is the PEP output of a transmitter that develops a peak voltage of 30 volts into a 50-ohm load?

E9A15

45. What is meant by the radiation resistance of an antenna?

E9G01

46. Which of the following can be calculated using a Smith chart?

E3A06

47. What frequency range would you normally tune to find EME signals in the 2 meter band?

E3B09

48. At what time of day is gray-line propagation most likely to occur?

E2E04

49. What is indicated when one of the ellipses in an FSK crossed-ellipse display suddenly disappears?

Figure

E6C07

50. In Figure E6-5, what is the schematic symbol for an AND gate?