Practice Exam

Element 4: Extra (EXPIRED)

E4B13

1. How is the compensation of an oscilloscope probe typically adjusted?

E6C12

2. What is BiCMOS logic?

E9E07

3. What term best describes the interactions at the load end of a mismatched transmission line?

E9A05

4. Which of the following factors may affect the feed point impedance of an antenna?

E1E03

5. What is a Volunteer Examiner Coordinator?

E4D14

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

E7H10

7. What information is contained in the lookup table of a direct digital frequency synthesizer?

E1B09

8. Which amateur stations may be operated in RACES?

E1D10

9. Which amateur stations are eligible to be telecommand stations?

E4A04

10. Which of the following test instruments is used to display spurious signals from a radio transmitter?

E1F05

11. Amateur stations may not transmit in which of the following frequency segments if they are located in the contiguous 48 states and north of Line A?

E7C11

12. Which of the following is the common name for a filter network which is equivalent to two L networks connected back-to-back with the inductors in series and the capacitors in shunt at the input and output?

E6D13

13. What type of CRT deflection is better when high-frequency waveforms are to be displayed on the screen?

E8D07

14. What is an electromagnetic wave?

E2B18

15. On which of the following frequencies is one likely to find FM ATV transmissions?

E5A13

16. What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 14.25 MHz and a Q of 187?

E5B05

17. How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01-microfarad capacitor when a 2-megohm resistor is connected across it?

E6B13

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

E2D04

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

E3C14

20. Why does the radio-path horizon distance exceed the geometric horizon?

Figure

E7D12

21. What is the purpose of R2 in the circuit shown in Figure E7-3?

E9G09

22. What third family of circles is often added to a Smith chart during the process of solving problems?

E7A02

23. How many output level changes are obtained for every two trigger pulses applied to the input of a T flip-flop circuit?

E2C12

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

E3B04

25. What type of propagation is probably occurring if an HF beam antenna must be pointed in a direction 180 degrees away from a station to receive the strongest signals?

E4E02

26. Which of the following types of receiver noise can often be reduced with a DSP noise filter?

Figure

E9C08

27. What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?

E7E02

28. What is the function of a reactance modulator?

E2E11

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

E9H12

30. What is an advantage of using a shielded loop antenna for direction finding?

E2A04

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

Figure

E7B12

32. What type of circuit is shown in Figure E7-1?

E9B06

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

E8C01

34. Which one of the following digital codes consists of elements having unequal length?

E7G15

35. What is the typical output impedance of an integrated circuit op-amp?

E9D11

36. What is the function of a loading coil as used with an HF mobile antenna?

E0A01

37. What, if any, are the differences between the radiation produced by radioactive materials and the electromagnetic energy radiated by an antenna?

E3A02

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

E6E06

39. What characteristics of the MMIC make it a popular choice for VHF through microwave circuits?

E7F09

40. What is the purpose of a frequency counter?

E6A17

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

E8B03

42. What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency, when the modulating frequency is 1000 Hz?

E1C06

43. Which of the following statements concerning remotely controlled amateur stations is true?

E9F15

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

E5C09

45. When using rectangular coordinates to graph the impedance of a circuit, what does the horizontal axis represent?

E8A03

46. What type of wave is made up of sine waves of a given fundamental frequency plus all its harmonics?

E4C07

47. What does the MDS of a receiver represent?

E5D08

48. What type of energy is stored in an electromagnetic or electrostatic field?

E6F07

49. What is a solid state relay?

E1A08

50. If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?