Practice Exam

Element 4: Extra

E1B07

1. To what type of regulations does PRB-1 apply?

E9F08

2. Which of the following is a significant difference between foam dielectric coaxial cable and solid dielectric cable, assuming all other parameters are the same?

E1D03

3. What is a space telecommand station?

E9D11

4. Which of the following conductors would be best for minimizing losses in a station's RF ground system?

E4C02

5. Which of the following receiver circuits can be effective in eliminating interference from strong out-of-band signals?

E1C09

6. What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?

E5B06

7. What is susceptance?

E5A03

8. What is the magnitude of the impedance of a series RLC circuit at resonance?

E2E07

9. Which of the following is a possible reason that attempts to initiate contact with a digital station on a clear frequency are unsuccessful?

E7D01

10. How does a linear electronic voltage regulator work?

E7H03

11. How is positive feedback supplied in a Hartley oscillator?

E4B03

12. Which S parameter is equivalent to forward gain?

E1E03

13. What is a Volunteer Examiner Coordinator?

E9E10

14. Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?

E8A03

15. What type of wave does a Fourier analysis show to be made up of sine waves of a given fundamental frequency plus all its harmonics?

E9C05

16. Which of the following is a type of OCFD antenna?

Figure

E9B02

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

Figure

E5C12

18. Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz?

E6D04

19. Which materials are commonly used as a core in an inductor?

E5D01

20. What is the result of skin effect?

E8B01

21. What is the modulation index of an FM signal?

Figure

E6C08

22. In Figure E6-3, what is the schematic symbol for a NAND gate?

E4A01

23. Which of the following limits the highest frequency signal that can be accurately displayed on a digital oscilloscope?

E9H04

24. What is an advantage of placing a grounded electrostatic shield around a small loop direction-finding antenna?

E2C08

25. Which of the following contacts may be confirmed through the U.S. QSL bureau system?

E1F02

26. What privileges are authorized in the U.S. to persons holding an amateur service license granted by the government of Canada?

E6E09

27. Which of the following component package types would be most suitable for use at frequencies above the HF range?

E6A01

28. In what application is gallium arsenide used as a semiconductor material?

Figure

E7G09

29. What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?

E8D04

30. What is the primary effect of extremely short rise or fall time on a CW signal?

E3A11

31. What is a typical range for tropospheric propagation of microwave signals?

E9G10

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

E3B09

33. At what time of year is sporadic E propagation most likely to occur?

E7A06

34. What is a characteristic of a monostable multivibrator?

E3C11

35. What does VOACAP software model?

E6F03

36. What is the most common configuration of an optoisolator or optocoupler?

E2B01

37. How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?

E1A03

38. What is the maximum legal carrier frequency on the 20 meter band for transmitting USB AFSK digital signals having a 1 kHz bandwidth?

E2D07

39. What digital protocol is used by APRS?

E7C07

40. Which describes a Pi-L-network used for matching a vacuum tube final amplifier to a 50-ohm unbalanced output?

E8C09

41. Which digital code allows only one bit to change between sequential code values?

E7E08

42. What are the principal frequencies that appear at the output of a mixer circuit?

E2A04

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

E9A03

44. What is the radiation resistance of an antenna?

E7B18

45. What is a characteristic of a grounded-grid amplifier?

E7F14

46. Which of the following would allow a digital signal processing filter to create a sharper filter response?

E4D07

47. Which of the following reduces the likelihood of receiver desensitization?

E6B11

48. What is used to control the attenuation of RF signals by a PIN diode?

E4E01

49. What problem can occur when using an automatic notch filter (ANF) to remove interfering carriers while receiving CW signals?

E0A10

50. What toxic material may be present in some electronic components such as high voltage capacitors and transformers?