Practice Exam

Element 4: Extra

E1D05

1. What must be posted at the location of a station being operated by telecommand on or within 50 kilometers of the Earth's surface?

E3C09

2. What type of data is reported by amateur radio propagation reporting networks?

E9C14

3. How does the radiation pattern of a horizontally-polarized antenna mounted above a long slope compare with the same antenna mounted above flat ground?

E8A05

4. What is the benefit of making voltage measurements with a true-RMS calculating meter?

E5D05

5. What parasitic characteristic causes electrolytic capacitors to be unsuitable for use at RF?

E9D10

6. How does radiation resistance of a base-fed whip antenna change below its resonant frequency?

E7G01

7. What is the typical output impedance of an op-amp?

Figure

E6A10

8. In Figure E6-1, which is the schematic symbol for an N-channel dual-gate MOSFET?

E9F05

9. What is microstrip?

Figure

E6C11

10. In Figure E6-3, which is the schematic symbol for the NOT operation (inversion)?

E6B06

11. Which of the following is a common use of a Schottky diode?

E1B07

12. To what type of regulations does PRB-1 apply?

E6E02

13. Which of the following device packages is a through-hole type?

E7E03

14. What is a frequency discriminator?

E8B10

15. What is frequency division multiplexing (FDM)?

E9E05

16. What Yagi driven element feed point impedance is required to use a beta or hairpin matching system?

E2E10

17. Which of these digital modes has the narrowest bandwidth?

E0A12

18. Where should a shock-absorbing lanyard be attached to a tower when working above ground?

E4D14

19. What power level does a receiver minimum discernible signal of -100 dBm represent?

E1E05

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

E4C11

21. Why does input attenuation reduce receiver overload on the lower frequency HF bands with little or no impact on signal-to-noise ratio?

E9A02

22. What is the effective radiated power (ERP) of a repeater station with 150 watts transmitter power output, 2 dB feed line loss, 2.2 dB duplexer loss, and 7 dBd antenna gain?

E5C03

23. Which of the following represents a pure inductive reactance in polar coordinates?

E3B06

24. On which of the following amateur bands is long-path propagation most frequent?

E7F09

25. Why is an anti-aliasing filter required in a decimator?

E2A09

26. What do the terms "L band" and "S band" specify?

E4A10

27. Which trigger mode is most effective when using an oscilloscope to measure a linear power supply's output ripple?

E4B10

28. Which of the following methods measures intermodulation distortion in an SSB transmitter?

E2D09

29. What type of modulation is used by JT65?

E1C07

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

E7H03

31. What is a phase-locked loop?

E2B10

32. What aspect of an analog slow-scan television signal encodes the brightness of the picture?

E9G11

33. In what units are the wavelength scales on a Smith chart calibrated?

E6D10

34. What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?

E2C04

35. Which of the following frequencies can be used for amateur radio mesh networks?

E7C05

36. Which filter type has ripple in the passband and a sharp cutoff?

Figure

E7B12

37. What type of amplifier circuit is shown in Figure E7-1?

E1A04

38. May an Extra class operator answer the CQ of a station on 3.601 MHz LSB phone?

E9H10

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

E7D04

40. Which of the following describes a three-terminal voltage regulator?

E1F09

41. Which of the following cannot be transmitted over an amateur radio mesh network?

E7A09

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

E4E04

43. How can conducted noise from an automobile battery charging system be suppressed?

E8D11

44. What is one advantage of using ASCII code for data communications?

E8C07

45. What is the bandwidth of a 4,800-Hz frequency shift, 9,600-baud ASCII FM transmission?

E9B11

46. What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?

E6F06

47. Which of these materials is most commonly used to create photoconductive devices?

E5B08

48. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 300 ohms, R is 100 ohms, and XL is 100 ohms?

E3A13

49. Which of these emission modes is best for auroral propagation?

E5A11

50. What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?