Practice Exam

Element 4: Extra (Expires June 30)

WARNING: This question pool expires in 43 days.

E9D12

1. Which of the following would provide the best RF ground for your station?

E1C09

2. What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?

E4E08

3. What current flows equally on all conductors of an unshielded multi-conductor cable?

E6B06

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

E7C03

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

E1F03

6. Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?

E6D07

7. What is current in the primary winding of a transformer called if no load is attached to the secondary?

E3C11

8. What does VOACAP software model?

E2B03

9. How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?

Figure

E9B04

10. What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?

Figure

E7B10

11. In Figure E7-1, what is the purpose of R1 and R2?

E6C04

12. Which of the following is an advantage of BiCMOS logic?

E4C01

13. What is an effect of excessive phase noise in a receiver's local oscillator?

E9C07

14. What is the approximate feed point impedance at the center of a two-wire folded dipole antenna?

E7H11

15. What are the major spectral impurity components of direct digital synthesizers?

E9F12

16. What impedance does a 1/4-wavelength transmission line present to a generator when the line is open at the far end?

E1B11

17. What does PRB-1 require of regulations affecting amateur radio?

E1A05

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

E4B03

19. Which S parameter is equivalent to forward gain?

E7D11

20. What is the function of the pass transistor in a linear voltage regulator circuit?

E1E09

21. What may be the penalty for a VE who fraudulently administers or certifies an examination?

E4A10

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

E3A09

23. Which of the following frequency ranges is most suited for meteor scatter communications?

E5D13

24. How many watts are consumed in a circuit consisting of a 100-ohm resistor in series with a 100-ohm inductive reactance drawing 1 ampere?

E8A07

25. What determines the PEP-to-average power ratio of a single-sideband phone signal?

E5B09

26. What is the relationship between the AC current through a capacitor and the voltage across a capacitor?

E9G03

27. Which of the following is often determined using a Smith chart?

E8B08

28. What describes Orthogonal Frequency Division Multiplexing?

E8D01

29. Why are received spread spectrum signals resistant to interference?

E7A08

30. What logical operation does an OR gate perform?

E3B04

31. What is meant by the terms "extraordinary" and "ordinary" waves?

E6E12

32. Why are DIP through-hole package ICs not typically used at UHF and higher frequencies?

E6F01

33. What absorbs the energy from light falling on a photovoltaic cell?

E5A12

34. What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?

E7E09

35. What occurs when an excessive amount of signal energy reaches a mixer circuit?

Figure

E6A10

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

E9E11

37. What is the primary purpose of phasing lines when used with an antenna having multiple driven elements?

E9A08

38. What is antenna bandwidth?

E9H11

39. What feature of a cardioid pattern antenna makes it useful for direction finding?

E4D04

40. Which of the following may reduce or eliminate intermodulation interference in a repeater caused by another transmitter operating in close proximity?

E5C02

41. How are impedances described in polar coordinates?

E2E11

42. What is the difference between direct FSK and audio FSK?

E2A07

43. Which of the following types of signals can be relayed through a linear transponder?

E2C11

44. How should you generally identify your station when attempting to contact a DX station during a contest or in a pileup?

E2D07

45. What digital protocol is used by APRS?

E7F01

46. What is meant by direct digital conversion as applied to software defined radios?

E8C04

47. What technique minimizes the bandwidth of a PSK31 signal?

E7G05

48. How can unwanted ringing and audio instability be prevented in an op-amp RC audio filter circuit?

E1D10

49. Which amateur stations are eligible to be telecommand stations of space stations (subject to the privileges of the class of operator license held by the control operator of the station)?

E0A10

50. What toxic material may be present in some electronic components such as high voltage capacitors and transformers?