Practice Exam

Element 4: Extra

E7E07

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

E1B09

2. Which amateur stations may be operated in RACES?

E7C10

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

E7H02

4. What condition must exist for a circuit to oscillate?

E4D14

5. Which of the following is a way to reduce the likelihood of receiver desensitization?

E5B03

6. The capacitor in an RC circuit is discharged to what percentage of the starting voltage after two time constants?

E7B08

7. How can an RF power amplifier be neutralized?

E4E14

8. What is one type of electrical interference that might be caused by the operation of a nearby personal computer?

E4B04

9. If a frequency counter with a specified accuracy of +/- 0.1 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

E2E02

10. What do the letters FEC mean as they relate to digital operation?

E8B06

11. What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?

E5A12

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

E1F14

13. Under what circumstances might the FCC issue a "Special Temporary Authority" (STA) to an amateur station?

E2A02

14. What is the direction of a descending pass for an amateur satellite?

Figure

E7G11

15. What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 3300 ohms and RF is 47 kilohms?

E7A06

16. What is a characteristic of a monostable multivibrator?

E6F12

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

Figure

E9C10

18. How many elevation lobes appear in the forward direction of the antenna radiation pattern shown in Figure E9-2?

E1A01

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

E7F05

20. Which of the following is a technique for providing high stability oscillators needed for microwave transmission and reception?

E8C04

21. What technique is used to minimize the bandwidth requirements of a PSK31 signal?

E8A12

22. What type of information can be conveyed using digital waveforms?

E2B14

23. What aspect of an amateur slow-scan television signal encodes the brightness of the picture?

E5C08

24. In polar coordinates, what is the impedance of a network comprised of a 300-ohm-reactance inductor in series with a 400-ohm resistor?

E4C10

25. Which of the following is a desirable amount of selectivity for an amateur RTTY HF receiver?

E7D05

26. Which of the following types of linear voltage regulator places a constant load on the unregulated voltage source?

E2C01

27. Which of the following is true about contest operating?

E6E11

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

E0A09

29. Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled?

E4A03

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

E9E02

31. What is the name of an antenna matching system that matches an unbalanced feed line to an antenna by feeding the driven element both at the center of the element and at a fraction of a wavelength to one side of center?

E9F03

32. Why is the physical length of a coaxial cable transmission line shorter than its electrical length?

E9H04

33. What term describes station output, including the transmitter, antenna and everything in between, when considering transmitter power and system gains and losses?

E3C08

34. What is the name of the high-angle wave in HF propagation that travels for some distance within the F2 region?

E2D07

35. Which of the following digital protocols is used by APRS?

E9G04

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

E1E14

37. For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed?

E3B05

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

E9B08

39. How can the approximate beamwidth in a given plane of a directional antenna be determined?

Figure

E6C10

40. In Figure E6-5, what is the schematic symbol for a NOR gate?

E1C03

41. How do the control operator responsibilities of a station under automatic control differ from one under local control?

E9A01

42. Which of the following describes an isotropic antenna?

E6A02

43. Which of the following semiconductor materials contains excess free electrons?

E6B07

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

E1D07

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

E3A07

46. What frequency range would you normally tune to find EME signals in the 70 cm band?

E8D15

47. Which of the following is a typical value for the RMS voltage at a standard U.S. household electrical power outlet?

E9D12

48. What is one advantage of using a trapped antenna?

E6D03

49. Which of the following is true of a charge-coupled device (CCD)?

E5D02

50. Why is the resistance of a conductor different for RF currents than for direct currents?