Practice Exam

Element 4: Extra

E2D02

1. What is the definition of baud?

E1E06

2. Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?

E8B06

3. What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?

E7H07

4. What is a magnetron oscillator?

E9F08

5. What is the term for the ratio of the actual speed at which a signal travels through a transmission line to the speed of light in a vacuum?

E4B12

6. What is the significance of voltmeter sensitivity expressed in ohms per volt?

E4C01

7. What is an effect of excessive phase noise in the local oscillator section of a receiver?

E1F12

8. Who may be the control operator of an auxiliary station?

E8C02

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

E5B11

10. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 50 ohms?

E7D02

11. What is one characteristic of a switching electronic voltage regulator?

E9E08

12. Which of the following measurements is characteristic of a mismatched transmission line?

E7G01

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

E7F05

14. Which of the following is a technique for providing high stability oscillators needed for microwave transmission and reception?

E5D03

15. What device is used to store electrical energy in an electrostatic field?

E5C03

16. In polar coordinates, what is the impedance of a network consisting of a 300-ohm-reactance capacitor, a 600-ohm-reactance inductor, and a 400-ohm resistor, all connected in series?

E2B03

17. How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?

E6E04

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

E1C01

19. What is a remotely controlled station?

E1A09

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

E2E04

21. What is indicated when one of the ellipses in an FSK crossed-ellipse display suddenly disappears?

E2C06

22. During a VHF/UHF contest, in which band segment would you expect to find the highest level of activity?

E0A11

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

E6C06

24. Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?

E1B10

25. What frequencies are authorized to an amateur station participating in RACES?

E3C10

26. How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?

E9C11

27. How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus rocky ground?

E9A12

28. Which of the following factors determines ground losses for a ground-mounted vertical antenna operating in the 3-30 MHz range?

E6A17

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

E3A08

30. When a meteor strikes the Earth's atmosphere, a cylindrical region of free electrons is formed at what layer of the ionosphere?

E7B05

31. What can be done to prevent unwanted oscillations in an RF power amplifier?

E7A02

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

E7E13

33. Which of the following describes a common means of generating an SSB signal when using digital signal processing?

E3B04

34. 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?

E9H10

35. How can the output voltage of a multi-turn receiving loop antenna be increased?

E9B10

36. What is the principle of a Method of Moments analysis?

E8D11

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

E4E09

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

E4D10

39. What does a third-order intercept level of 40 dBm mean with respect to receiver performance?

E6B09

40. What is a common use for point contact diodes?

E9D13

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

E7C03

42. What advantage does a Pi-L-network have over a Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

E4A11

43. Which of these instruments could be used for detailed analysis of digital signals?

E6F12

44. What absorbs the energy from light falling on a photovoltaic cell?

E1D10

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

E6D01

46. What is cathode ray tube (CRT) persistence?

Figure

E9G05

47. What type of chart is shown in Figure E9-3?

E5A02

48. What is resonance in an electrical circuit?

E2A08

49. Why should effective radiated power to a satellite which uses a linear transponder be limited?

E8A02

50. What type of wave has a rise time significantly faster than its fall time (or vice versa)?