Practice Exam

Element 4: Extra

E3C02

1. What is indicated by a rising A or K index?

E2D11

2. Which of the following data are used by the APRS network to communicate station location?

E3B06

3. Which of the following amateur bands most frequently provides long-path propagation?

E5B10

4. What is the relationship between the AC current through an inductor and the voltage across an inductor?

E9E02

5. What is the name of an antenna matching system that matches an unbalanced feed line to an antenna by feeding the driven element both at the center of the element and at a fraction of a wavelength to one side of center?

Figure

E9B04

6. What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?

E1A12

7. What special operating frequency restrictions are imposed on slow scan TV transmissions?

E7B09

8. Which of the following describes how the loading and tuning capacitors are to be adjusted when tuning a vacuum tube RF power amplifier that employs a Pi-network output circuit?

E6F03

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

E8A07

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

E2E11

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

E6E07

12. What type of transmission line is used for connections to MMICs?

E9D06

13. What happens to the SWR bandwidth when one or more loading coils are used to resonate an electrically short antenna?

E7C09

14. What is a crystal lattice filter?

E7G12

15. What is an operational amplifier?

E1C01

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

Figure

E7D08

17. What type of circuit is shown in Figure E7-2?

E7H06

18. Which of the following oscillator circuits are commonly used in VFOs?

E8C01

19. How is Forward Error Correction implemented?

E5C05

20. What is the name of the diagram used to show the phase relationship between impedances at a given frequency?

E9A01

21. What is an isotropic antenna?

E4C13

22. How does a narrow-band roofing filter affect receiver performance?

E1E10

23. What must the administering VEs do after the administration of a successful examination for an amateur operator license?

E2C05

24. What is the function of a DX QSL Manager?

E7E04

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

E5D06

26. In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?

E4B08

27. Which of the following can be used to measure the Q of a series-tuned circuit?

E7F04

28. What is a common method of generating an SSB signal using digital signal processing?

E2B02

29. How many horizontal lines make up a fast-scan (NTSC) television frame?

E4E06

30. What is one type of electrical interference that might be caused by a nearby personal computer?

E8B10

31. What is frequency division multiplexing?

E2A09

32. What do the terms "L band" and "S band" specify regarding satellite communications?

E1F08

33. Which of the following types of amateur station communications are prohibited?

E9H06

34. What is the triangulation method of direction finding?

E4D08

35. What causes intermodulation in an electronic circuit?

E7A03

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

E6C05

37. What is an advantage of CMOS logic devices over TTL devices?

E8D02

38. What spread spectrum communications technique uses a high-speed binary bit stream to shift the phase of an RF carrier?

E6A01

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

E3A03

40. When scheduling EME contacts, which of these conditions will generally result in the least path loss?

E4A05

41. What is the purpose of the prescaler function on a frequency counter?

E0A07

42. How may dangerous levels of carbon monoxide from an emergency generator be detected?

E9G02

43. What type of coordinate system is used in a Smith chart?

E6B05

44. What characteristic of a PIN diode makes it useful as an RF switch?

E1B11

45. What does PRB-1 require of regulations affecting amateur radio?

E9F11

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

E5A16

47. What is the resonant frequency of an RLC circuit if R is 33 ohms, L is 50 microhenries and C is 10 picofarads?

E9C06

48. What is the effect of adding a terminating resistor to a rhombic antenna?

E6D04

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

E1D08

50. Which VHF amateur bands have frequencies authorized for space stations?