Practice Exam

Element 4: Extra (EXPIRED)

E6F07

1. What is a solid state relay?

E7B20

2. What is a parametric amplifier?

E2A04

3. What is meant by the term mode as applied to an amateur radio satellite?

E3A05

4. Which of the following describes a method of establishing EME contacts?

E5B03

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

E5A09

6. What is the phase relationship between the current through and the voltage across a parallel resonant circuit at resonance?

E1C04

7. When may an automatically controlled station retransmit third party communications?

E7D15

8. What is the purpose of a "step-start" circuit in a high-voltage power supply?

E1E13

9. What are the consequences of failing to appear for re-administration of an examination when so directed by the FCC?

E7E04

10. What is one way a single-sideband phone signal can be generated?

E2D07

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

E4A06

12. Which of the following could be determined with a spectrum analyzer?

E9A03

13. Which of the following antennas has no gain in any direction?

E9D08

14. What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?

E3B09

15. At what time of day is gray-line propagation most likely to occur?

E4E08

16. What type of signal is picked up by electrical wiring near a radio antenna?

Figure

E7G07

17. What magnitude of voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?

E1F01

18. On what frequencies are spread spectrum transmissions permitted?

E4B09

19. What is indicated if the current reading on an RF ammeter placed in series with the antenna feed line of a transmitter increases as the transmitter is tuned to resonance?

E0A02

20. When evaluating RF exposure levels from your station at a neighbor's home, what must you do?

E6A08

21. What term indicates the frequency at which the grounded-base current gain of a transistor has decreased to 0.7 of the gain obtainable at 1 kHz?

E8C08

22. What term describes a wide-bandwidth communications system in which the transmitted carrier frequency varies according to some predetermined sequence?

E6E04

23. What is the most common input and output impedance of circuits that use MMICs?

E7C04

24. How does an impedance-matching circuit transform a complex impedance to a resistive impedance?

E9H02

25. 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?

E3C13

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

E7F10

27. What alternate method of determining frequency, other than by directly counting input pulses, is used by some counters?

E5C04

28. In polar coordinates, what is the impedance of a network consisting of a 400-ohm-reactance capacitor in series with a 300-ohm resistor?

E9C03

29. What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed in phase?

E7H04

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

E9B07

31. How does the total amount of radiation emitted by a directional gain antenna compare with the total amount of radiation emitted from an isotropic antenna, assuming each is driven by the same amount of power?

E8B10

32. Which of these methods can be used to combine several separate analog information streams into a single analog radio frequency signal?

E4C04

33. What is the definition of the noise figure of a receiver?

E9E01

34. What system matches a high-impedance transmission line to a lower impedance antenna by connecting the line to the driven element in two places spaced a fraction of a wavelength each side of element center?

E5D04

35. What unit measures electrical energy stored in an electrostatic field?

E7A07

36. What logical operation does a NAND gate perform?

E6B02

37. What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?

E9G10

38. What do the arcs on a Smith chart represent?

E1D05

39. What class of licensee is authorized to be the control operator of a space station?

E6D15

40. What is the principle advantage of liquid-crystal display (LCD) devices over other types of display devices?

E1B11

41. 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?

E2E01

42. Which type of modulation is common for data emissions below 30 MHz?

E1A11

43. What authorization or licensing is required when operating an amateur station aboard a US-registered vessel in international waters?

E8A07

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

E9F07

45. How does ladder line compare to small-diameter coaxial cable such as RG-58 at 50 MHz?

E6C01

46. What is the recommended power supply voltage for TTL series integrated circuits?

E2C12

47. What might help to restore contact when DX signals become too weak to copy across an entire HF band a few hours after sunset?

E4D01

48. What is meant by the blocking dynamic range of a receiver?

E2B15

49. What signals SSTV receiving equipment to begin a new picture line?

E8D08

50. Which of the following best describes electromagnetic waves traveling in free space?