Practice Exam

Element 4: Extra

E8D02

1. What is the relationship between the peak-to-peak voltage and the peak voltage amplitude of a symmetrical waveform?

E5C22

2. In rectangular coordinates, what is the impedance of a network consisting of a 10-microhenry inductor in series with a 40-ohm resistor at 500 MHz?

Figure

E6C09

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

E6B03

4. What special type of diode is capable of both amplification and oscillation?

E7E13

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

E1C02

6. What is meant by automatic control of a station?

E6A12

7. Why do many MOSFET devices have internally connected Zener diodes on the gates?

E7A09

8. What logical operation is performed by a two-input exclusive NOR gate?

E4C08

9. How might lowering the noise figure affect receiver performance?

E8C11

10. What spread-spectrum communications technique uses a high speed binary bit stream to shift the phase of an RF carrier?

E2E10

11. Which of these digital communications modes has the narrowest bandwidth?

E7H12

12. Which of the following is a principal component of a direct digital synthesizer (DDS)?

E7C10

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

E7F10

14. What alternate method of determining frequency, other than by directly counting input pulses, is used by some counters?

E5B02

15. 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?

E9C01

16. What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?

E9H10

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

E6F09

18. What is the efficiency of a photovoltaic cell?

E2A03

19. What is the orbital period of an Earth satellite?

E1B06

20. Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?

E7G04

21. Which of the following is a type of capacitor best suited for use in high-stability op-amp RC active filter circuits?

E8B01

22. What is the term for the ratio between the frequency deviation of an RF carrier wave, and the modulating frequency of its corresponding FM-phone signal?

E3A01

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

E2B18

24. On which of the following frequencies is one likely to find FM ATV transmissions?

E6D15

25. What is the principle advantage of liquid-crystal display (LCD) devices over other types of display devices?

Figure

E9G07

26. On the Smith chart shown in Figure E9-3, what is the only straight line shown?

E4A03

27. Which of the following parameters would a spectrum analyzer display on the vertical axis?

E1F06

28. What is the National Radio Quiet Zone?

E9E06

29. What is the equivalent lumped-constant network for a hairpin matching system on a 3-element Yagi?

E2D02

30. What is the definition of baud?

E4B06

31. How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?

E4D11

32. Why are third-order intermodulation products created within a receiver of particular interest compared to other products?

E1E11

33. What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?

E4E08

34. What type of signal is picked up by electrical wiring near a radio antenna?

E3C12

35. How does the maximum distance of ground-wave propagation change when the signal frequency is increased?

Figure

E9B03

36. In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio?

Figure

E7D12

37. What is the purpose of R2 in the circuit shown in Figure E7-3?

E2C12

38. What might help to restore contact when DX signals become too weak to copy across an entire HF band a few hours after sunset?

E5A08

39. What is the phase relationship between the current through and the voltage across a series resonant circuit at resonance?

E1D06

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

E9D05

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

E9A07

42. What is a folded dipole antenna?

E8A15

43. What would the waveform of a stream of digital data bits look like on a conventional oscilloscope?

E1A02

44. When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the lowest frequency at which a properly adjusted LSB emission will be totally within the band?

E3B10

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

E9F09

46. 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?

Figure

E7B13

47. In Figure E7-2, what is the purpose of R?

E6E03

48. What is one aspect of the piezoelectric effect?

E0A11

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

E5D09

50. What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?