Practice Exam

Element 4: Extra (EXPIRED)

E1D04

1. What is an Earth station in the amateur satellite service?

E8A07

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

E7A05

3. Which of the following is a circuit that continuously alternates between two states without an external clock?

E1A09

4. What is the first action you should take if your digital message forwarding station inadvertently forwards a communication that violates FCC rules?

E4C02

5. Which of the following portions of a receiver can be effective in eliminating image signal interference?

E5C11

6. What do the two numbers represent that are used to define a point on a graph using rectangular coordinates?

E0A11

7. Which of the following injuries can result from using high-power UHF or microwave transmitters?

E8D07

8. What is an electromagnetic wave?

E7H17

9. Why is a phase-locked loop often used as part of a variable frequency synthesizer for receivers and transmitters?

Figure

E7D10

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

E4D07

11. Which of the following describes the most significant effect of an off-frequency signal when it is causing cross-modulation interference to a desired signal?

E7G01

12. What primarily determines the gain and frequency characteristics of an op-amp RC active filter?

E3B07

13. Which of the following could account for hearing an echo on the received signal of a distant station?

E8C07

14. What is the necessary bandwidth of a 4800-Hz frequency shift, 9600-baud ASCII FM transmission?

E1E09

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

E1F10

16. What is the maximum transmitter power for an amateur station transmitting spread spectrum communications?

E7C07

17. What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?

E3C03

18. Where in the ionosphere does Aurora activity occur?

E6E04

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

E6B03

20. What special type of diode is capable of both amplification and oscillation?

E7B20

21. What is a parametric amplifier?

E8B11

22. Which of the following describes frequency division multiplexing?

E2E11

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

E9D13

24. What happens to feed point impedance at the base of a fixed-length HF mobile antenna as the frequency of operation is lowered?

E3A02

25. What characterizes libration fading of an Earth-Moon-Earth signal?

E4A12

26. Which of the following procedures is an important precaution to follow when connecting a spectrum analyzer to a transmitter output?

E1B04

27. What must be done before placing an amateur station within an officially designated wilderness area or wildlife preserve, or an area listed in the National Register of Historical Places?

E2A04

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

E1C09

29. Which of these frequencies are available for an automatically controlled repeater operating below 30 MHz?

E4B01

30. Which of the following factors most affects the accuracy of a frequency counter?

E9A14

31. How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 12 dB gain over an isotropic antenna?

E6D14

32. Which is NOT true of a charge-coupled device (CCD)?

E5B03

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

E2C03

34. From which of the following bands is amateur radio contesting generally excluded?

E9C02

35. What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?

E7E09

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

E9H06

37. What is the triangulation method of direction finding?

E6A03

38. What are the majority charge carriers in P-type semiconductor material?

E9B06

39. If the boom of a Yagi antenna is lengthened and the elements are properly retuned, what usually occurs?

E2D04

40. What is the purpose of digital store-and-forward functions on an Amateur Radio satellite?

E7F09

41. What is the purpose of a frequency counter?

E2B16

42. Which of the following is the video standard used by North American Fast Scan ATV stations?

E4E10

43. What is a common characteristic of interference caused by a touch controlled electrical device?

E6F05

44. Which of the following describes an optical shaft encoder?

E9E13

45. What is the purpose of a Wilkinson divider?

E9G04

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

E9F11

47. What impedance does a 1/8-wavelength transmission line present to a generator when the line is open at the far end?

E6C12

48. What is BiCMOS logic?

E5A09

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

E5D18

50. How many watts are consumed in a circuit having a power factor of 0.71 if the apparent power is 500 VA?