Practice Exam

Element 4: Extra (EXPIRED)

E6C04

1. Which of the following is the primary advantage of tri-state logic?

Figure

E6B10

2. In Figure E6-3, what is the schematic symbol for a light-emitting diode?

E4D13

3. Which of the following can cause receiver desensitization?

E1C10

4. What types of amateur stations may automatically retransmit the radio signals of other amateur stations?

E9H10

5. How can the output voltage of a multi-turn receiving loop antenna be increased?

E4A09

6. Which of the following describes a good method for measuring the intermodulation distortion of your own PSK signal?

E2E05

7. How does ARQ accomplish error correction?

E8B05

8. 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?

E3A03

9. When scheduling EME contacts, which of these conditions will generally result in the least path loss?

E5D15

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

E7F06

11. What is one purpose of a marker generator?

E9F06

12. What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically one-half wavelength long at 14.10 MHz?

E7C13

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

E7B19

14. What is a klystron?

E1F02

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

E1E12

16. What must the VE team do with the application form if the examinee does not pass the exam?

E5B13

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

E6D02

18. Exceeding what design rating can cause a cathode ray tube (CRT) to generate X-rays?

E7G12

19. What is an integrated circuit operational amplifier?

E2A04

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

E4E06

21. What is a major cause of atmospheric static?

E2B01

22. How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?

E9B06

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

E8D12

24. What is the peak voltage of a sinusoidal waveform if an RMS-reading voltmeter reads 34 volts?

E9G11

25. How are the wavelength scales on a Smith chart calibrated?

E8A05

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

E2C07

27. What is the Cabrillo format?

E6A13

28. What do the initials CMOS stand for?

E8C09

29. Which of these techniques causes a digital signal to appear as wide-band noise to a conventional receiver?

E7H09

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

E4C11

31. Which of the following is a desirable amount of selectivity for an amateur SSB phone receiver?

E4B05

32. If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

E2D06

33. Which of the following is a commonly used 2-meter APRS frequency?

E3B05

34. Which amateur bands typically support long-path propagation?

E5A15

35. What is the resonant frequency of a series RLC circuit if R is 56 ohms, L is 40 microhenrys and C is 200 picofarads?

E9D02

36. How can linearly polarized Yagi antennas be used to produce circular polarization?

E7A05

37. Which of the following is a circuit that continuously alternates between two states without an external clock?

E9E07

38. What term best describes the interactions at the load end of a mismatched transmission line?

E0A07

39. How may dangerous levels of carbon monoxide from an emergency generator be detected?

E1D07

40. Which amateur service HF bands have frequencies authorized to space stations?

E9C03

41. What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed in phase?

E5C17

42. In rectangular coordinates, what is the impedance of a circuit that has an admittance of 5 millisiemens at -30 degrees?

E6F02

43. What happens to the conductivity of a photoconductive material when light shines on it?

E1B12

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

E1A07

45. What is the only amateur band where transmission on specific channels rather than a range of frequencies is permitted?

E9A13

46. How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 6 dB gain over an isotropic antenna?

E3C01

47. Which of the following effects does Aurora activity have on radio communications?

E7E13

48. Which of the following describes a common means of generating an SSB signal when using digital signal processing?

E6E10

49. What is the equivalent circuit of a quartz crystal?

Figure

E7D13

50. What is the purpose of D1 in the circuit shown in Figure E7-3?