Practice Exam

Element 4: Extra

E6E08

1. How is power supplied to the most common type of MMIC?

E2B01

2. In digital television, what does a coding rate of 3/4 mean?

Figure

E5C12

3. 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?

E8D06

4. What is the advantage of including parity bits in ASCII characters?

E9C10

5. Which of the following describes a Zepp antenna?

E5B02

6. What letter is commonly used to represent susceptance?

E7H04

7. How is positive feedback supplied in a Colpitts oscillator?

E7B05

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

E1C03

9. How long must an operator wait after filing a notification with the Utilities Technology Council (UTC) before operating on the 2200-meter or 630-meter band?

E4D08

10. What causes intermodulation in an electronic circuit?

E1F01

11. On what frequencies are spread spectrum transmissions permitted?

E4E01

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

E6D02

13. What is the equivalent circuit of a quartz crystal?

E6F10

14. What is the most common material used in power-generating photovoltaic cells?

E1A10

15. If an amateur station is installed aboard a ship or aircraft, what condition must be met before the station is operated?

E4A01

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

E5A01

17. What can cause the voltage across reactances in a series RLC circuit to be higher than the voltage applied to the entire circuit?

E7E11

18. Which type of detector is used for demodulating SSB signals?

Figure

E6C10

19. In Figure E6-3, which is the schematic symbol for a NOR gate?

E7F13

20. What is the function of taps in a digital signal processing filter?

E0A08

21. What does SAR measure?

E5D03

22. What is the phase relationship between current and voltage for reactive power?

E2A09

23. What do the terms "L band" and "S band" specify?

E7A03

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

E2E13

25. Which of these digital modes has the highest data throughput under clear communication conditions?

E1D10

26. Which amateur stations are eligible to be telecommand stations of space stations, subject to the privileges of the class of operator license held by the control operator of the station?

E1B07

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

E7G08

28. How does the gain of an ideal operational amplifier vary with frequency?

E8A11

29. Which of the following is a measure of the quality of an analog-to-digital converter?

E8C01

30. What is Quadrature Amplitude Modulation or QAM?

E4C07

31. What does the MDS of a receiver represent?

E1E04

32. What is required to be accredited as a Volunteer Examiner?

E8B04

33. What is the modulation index of an FM phone signal having a maximum carrier deviation of plus or minus 6 kHz if the highest modulating frequency is 2 kHz?

E3B07

34. What effect does lowering a signal's transmitted elevation angle have on ionospheric HF skip propagation?

E2D03

35. Which of the following digital modes is designed for EME communications?

Figure

E7D08

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

E9D06

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

E9A04

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

E2C10

39. Why do DX stations often transmit and receive on different frequencies?

E6A08

40. What is the term for the frequency at which the grounded-base current gain of a bipolar junction transistor has decreased to 0.7 of the gain obtainable at 1 kHz?

E9H10

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

E7C06

42. What are the characteristics of an elliptical filter?

E3C08

43. Which of the following is the space-weather term for an extreme geomagnetic storm?

E3A07

44. Atmospheric ducts capable of propagating microwave signals often form over what geographic feature?

E9G10

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

E4B01

46. Which of the following factors most affects the accuracy of a frequency counter?

Figure

E9B03

47. What is the front-to-side ratio of the antenna radiation pattern shown in Figure E9-1?

E9F01

48. What is the velocity factor of a transmission line?

E6B07

49. What causes a junction diode to fail from excessive current?

E9E08

50. What is a use for a Wilkinson divider?