Practice Exam

Element 4: Extra (Starts July 1)

E2A06

1. What are Keplerian elements?

E6D03

2. Which of the following is an aspect of the piezoelectric effect?

E2D05

3. What is one advantage of the JT65 mode?

E1F02

4. What privileges are authorized in the U.S. to persons holding an amateur service license granted by the government of Canada?

E5D14

5. What is reactive power?

Figure

E5C11

6. Which point in Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and an 18-microhenry inductor at 3.505 MHz?

E4C07

7. What does the MDS of a receiver represent?

E8C06

8. What is the bandwidth of a 170-hertz shift, 300-baud ASCII transmission?

E7F03

9. What type of digital signal processing filter is used to generate an SSB signal?

E9B09

10. What type of computer program technique is commonly used for modeling antennas?

E6F06

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

E2B07

12. What is the name of the signal component that carries color information in NTSC video?

E1E04

13. Which of the following best describes the Volunteer Examiner accreditation process?

E4E03

14. Which of the following signals might a receiver noise blanker be able to remove from desired signals?

E6A02

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

E6E11

16. What is a characteristic of DIP packaging used for integrated circuits?

E1C09

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

E3A11

18. What is a typical range for tropospheric propagation of microwave signals?

E6B03

19. What type of bias is required for an LED to emit light?

E9A06

20. What is the effective radiated power relative to a dipole of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?

E7D05

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

E8A06

22. What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?

E9C07

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

E0A10

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

E4A02

25. Which of the following parameters does a spectrum analyzer display on the vertical and horizontal axes?

E5A06

26. What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?

E5B09

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

E9G01

28. Which of the following can be calculated using a Smith chart?

E7B16

29. What is the effect of intermodulation products in a linear power amplifier?

E2E12

30. How do ALE stations establish contact?

E1A07

31. What is the maximum power permitted on the 2200 meter band?

E8B05

32. What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?

Figure

E7G10

33. What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 1800 ohms and RF is 68 kilohms?

E7H03

34. How is positive feedback supplied in a Hartley oscillator?

E8D01

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

E2C07

36. What is the Cabrillo format?

E9F13

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

E3B10

38. Why is chordal hop propagation desirable?

E7A04

39. How many flip-flops are required to divide a signal frequency by 4?

E6C07

40. What best describes a pull-up or pull-down resistor?

E9E05

41. How must an antenna's driven element be tuned to use a hairpin matching system?

E1D11

42. Which amateur stations are eligible to operate as Earth stations?

E9D10

43. What happens to feed-point impedance at the base of a fixed length HF mobile antenna when operated below its resonant frequency?

E7E10

44. How does a diode envelope detector function?

E3C10

45. What does the 304A solar parameter measure?

E4B04

46. Which S parameter represents input port return loss or reflection coefficient (equivalent to VSWR)?

E9H07

47. Why is RF attenuation used when direction-finding?

E4D03

48. How can intermodulation interference between two repeaters occur?

E1B03

49. Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?

E7C06

50. What are the distinguishing features of an elliptical filter?