Practice Exam

Element 4: Extra

E2A05

1. What do the letters in a satellite's mode designator specify?

E7F02

2. Which of the following would be used to reduce a signal's frequency by a factor of ten?

E7E07

3. What is meant by the term baseband in radio communications?

E2B13

4. How many lines are commonly used in each frame on an amateur slow-scan color television picture?

E4B13

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

E6A02

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

E1E08

7. To which of the following examinees may a VE not administer an examination?

E1D06

8. Which of the following special provisions must a space station incorporate in order to comply with space station requirements?

Figure

E9B03

9. In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio?

E9F03

10. Why is the physical length of a coaxial cable transmission line shorter than its electrical length?

Figure

E7B13

11. In Figure E7-2, what is the purpose of R?

E4E09

12. What undesirable effect can occur when using an IF noise blanker?

E9A06

13. What is included in the total resistance of an antenna system?

E1A08

14. 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?

E4A03

15. Which of the following parameters would a spectrum analyzer display on the vertical axis?

E6E03

16. What is one aspect of the piezoelectric effect?

E9E04

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

E7G02

18. What is the effect of ringing in a filter?

E7C05

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

E0A09

20. Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled?

E6D03

21. Which of the following is true of a charge-coupled device (CCD)?

E3C13

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

E7D04

23. Which of the following types of linear voltage regulator usually make the most efficient use of the primary power source?

E5B08

24. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 100 ohms, R is 100 ohms, and XL is 75 ohms?

E8A01

25. What type of wave is made up of a sine wave plus all of its odd harmonics?

Figure

E9G06

26. On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?

E3B09

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

E2D06

28. Which of the following is a commonly used 2-meter APRS frequency?

E8C02

29. What are some of the differences between the Baudot digital code and ASCII?

E6B05

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

Figure

E6C11

31. In Figure E6-5, what is the schematic symbol for the NOT operation (inverter)?

E9C13

32. What is the main effect of placing a vertical antenna over an imperfect ground?

E9H03

33. What is the effective isotropic radiated power of a repeater station with 200 watts transmitter power output, 2-dB feed line loss, 2.8-dB duplexer loss, 1.2-dB circulator loss and 7-dBi antenna gain?

E3A06

34. What frequency range would you normally tune to find EME signals in the 2 meter band?

E2C09

35. How does the spread-spectrum technique of frequency hopping work?

E6F11

36. Which of the following is the approximate open-circuit voltage produced by a fully-illuminated silicon photovoltaic cell?

E5C08

37. In polar coordinates, what is the impedance of a network comprised of a 300-ohm-reactance inductor in series with a 400-ohm resistor?

E5D07

38. What determines the strength of a magnetic field around a conductor?

E9D09

39. What is an advantage of using top loading in a shortened HF vertical antenna?

E2E06

40. What is the most common data rate used for HF packet communications?

E7A03

41. Which of the following can divide the frequency of a pulse train by 2?

E8B01

42. What is the term for the ratio between the frequency deviation of an RF carrier wave, and the modulating frequency of its corresponding FM-phone signal?

E1C10

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

E7H14

44. What is a phase-locked loop circuit?

E5A17

45. What is the resonant frequency of a parallel RLC circuit if R is 47 ohms, L is 25 microhenrys and C is 10 picofarads?

E4D14

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

E8D11

47. What is the average power dissipated by a 50-ohm resistive load during one complete RF cycle having a peak voltage of 35 volts?

E4C08

48. How might lowering the noise figure affect receiver performance?

E1B05

49. What is the maximum bandwidth for a data emission on 60 meters?

E1F06

50. What is the National Radio Quiet Zone?