Practice Exam

Element 4: Extra

E4A10

1. Which of the following displays multiple digital signal states simultaneously?

E2A06

2. What are Keplerian elements?

E2E04

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

E9B10

4. What is the principle of a Method of Moments analysis?

E2C06

5. During a VHF/UHF contest, in which band segment would you expect to find the highest level of SSB or CW activity?

E2D09

6. What type of modulation is used for JT65 contacts?

E8D04

7. What is the primary effect of extremely short rise or fall time on a CW signal?

E4D02

8. Which of the following describes problems caused by poor dynamic range in a receiver?

E4B06

9. 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?

E8A05

10. What of the following instruments would be the most accurate for measuring the RMS voltage of a complex waveform?

E5B04

11. What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors, all in parallel?

E9G04

12. What are the two families of circles and arcs that make up a Smith chart?

E3C04

13. What does the value of Bz (B sub Z) represent?

E6D04

14. Which materials are commonly used as a core in an inductor?

E6B07

15. What is the failure mechanism when a junction diode fails due to excessive current?

E7H14

16. What is a phase-locked loop circuit?

E6C02

17. What happens when the level of a comparator's input signal crosses the threshold?

E5C02

18. How are impedances described in polar coordinates?

E6F02

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

E0A03

20. Over what range of frequencies are the FCC human body RF exposure limits most restrictive?

E1E07

21. What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?

E9H01

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

E1A04

23. With your transceiver displaying the carrier frequency of phone signals, you hear a DX station calling CQ on 3.601 MHz LSB. Is it legal to return the call using lower sideband on the same frequency?

E1B05

24. What is the National Radio Quiet Zone?

E1D02

25. Which of the following may transmit special codes intended to obscure the meaning of messages?

E9E04

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

E3B05

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

E4C15

28. What is reciprocal mixing?

E8C09

29. Which digital code allows only one bit to change between sequential code values?

E9C14

30. 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?

E8B09

31. What is deviation ratio?

E7B17

32. Why are odd-order rather than even-order intermodulation distortion products of concern in linear power amplifiers?

E2B05

33. Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?

E7F07

34. What function is performed by a Fast Fourier Transform?

E7A09

35. What logical operation is performed by an exclusive NOR gate?

E5D04

36. Why are short connections used at microwave frequencies?

E7E07

37. What is meant by the term "baseband" in radio communications?

E4E05

38. How can radio frequency interference from an AC motor be suppressed?

E7C11

39. Which of the following describes a receiving filter's ability to reject signals occupying an adjacent channel?

E6A03

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

E5A05

41. What is the result of increasing the Q of an impedance-matching circuit?

E9D05

42. What usually occurs if a Yagi antenna is designed solely for maximum forward gain?

E9F09

43. What is the approximate physical length of a foam polyethylene dielectric coaxial transmission line that is electrically 1/4 wavelength long at 7.2 MHz?

E6E03

44. Which of the following materials is likely to provide the highest frequency of operation when used in MMICs?

E1F01

45. On what frequencies are spread spectrum transmissions permitted?

E7G12

46. What is an operational amplifier?

E3A03

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

E9A04

48. Which of the following factors affect the feed point impedance of an antenna?

E1C13

49. What notifications must be given before transmitting on the 630 meter or 2200 meter bands?

E7D02

50. What is a characteristic of a switching electronic voltage regulator?