Practice Exam

Element 4: Extra (EXPIRED)

Figure

E7G11

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

E4E05

2. How can noise from an electric motor be suppressed?

E5B07

3. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 500 ohms, R is 1 kilohm, and XL is 250 ohms?

E3B06

4. Which of the following amateur bands most frequently provides long-path propagation?

E1D03

5. What is a telecommand station in the amateur satellite service?

E4D08

6. What causes intermodulation in an electronic circuit?

E8D01

7. Which of the following is the easiest voltage amplitude parameter to measure when viewing a pure sine wave signal on an analog oscilloscope?

E2E07

8. What is the typical bandwidth of a properly modulated MFSK16 signal?

E2B07

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

E3C13

10. What type of polarization is best for ground-wave propagation?

E7E13

11. Which of the following describes a common means of generating an SSB signal when using digital signal processing?

E4B15

12. Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?

E7C05

13. Which filter type is described as having ripple in the passband and a sharp cutoff?

E3A03

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

E5D13

15. How much power is consumed in a circuit consisting of a 100 ohm resistor in series with a 100 ohm inductive reactance drawing 1 ampere?

Figure

E7D10

16. What is the purpose of C3 in the circuit shown in Figure E7-3?

E6E09

17. Which of the following must be done to insure that a crystal oscillator provides the frequency specified by the crystal manufacturer?

E2C05

18. What is the function of a DX QSL Manager?

E7A10

19. What is a truth table?

E5A01

20. What can cause the voltage across reactances in series to be larger than the voltage applied to them?

E7B04

21. Where on the load line of a Class A common emitter amplifier would bias normally be set?

E6B05

22. What characteristic of a PIN diode makes it useful as an RF switch or attenuator?

E9D04

23. Why is it desirable for a ground-mounted satellite communications antenna system to be able to move in both azimuth and elevation?

E6D07

24. What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used?

E4C15

25. What is the primary source of noise that can be heard from an HF receiver with an antenna connected?

E9F15

26. What impedance does a 1/2-wavelength transmission line present to a generator when the line is open at the far end?

E7F08

27. Which of the following is performed by a frequency counter?

E0A05

28. What is one of the potential hazards of using microwaves in the amateur radio bands?

E7H04

29. How is positive feedback supplied in a Colpitts oscillator?

E5C07

30. In polar coordinates, what is the impedance of a network comprised of a 100-ohm-reactance capacitor in parallel with a 100-ohm resistor?

E6C12

31. What is BiCMOS logic?

E9E04

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

E9G08

33. What is the process of normalization with regard to a Smith chart?

Figure

E9B01

34. In the antenna radiation pattern shown in Figure E9-1, what is the 3-dB beamwidth?

E2A07

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

E1B11

36. What is the permitted mean power of any spurious emission relative to the mean power of the fundamental emission from a station transmitter or external RF amplifier installed after January 1, 2003, and transmitting on a frequency below 30 MHZ?

E1C10

37. What types of amateur stations may automatically retransmit the radio signals of other amateur stations?

E9A11

38. Which of the following choices is a way to improve the efficiency of a ground-mounted quarter-wave vertical antenna?

E8C11

39. What spread-spectrum communications technique uses a high speed binary bit stream to shift the phase of an RF carrier?

E2D12

40. How does JT65 improve EME communications?

E8A12

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

E6F01

42. What is photoconductivity?

E1F03

43. 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?

E8B12

44. What is digital time division multiplexing?

E9H05

45. What is the main drawback of a wire-loop antenna for direction finding?

E9C01

46. What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?

E1A13

47. Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?

E4A08

48. Which of the following instruments would be best for measuring the SWR of a beam antenna?

E6A17

49. What are the names of the three terminals of a field-effect transistor?

E1E02

50. Where are the questions for all written US amateur license examinations listed?