Practice Exam

Element 4: Extra

E8C15

1. What technique do individual nodes use to form a mesh network?

E2B05

2. Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?

E9G02

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

E3A07

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

Figure

E6C11

5. In Figure E6-3, which is the schematic symbol for the NOT operation (inversion)?

E2A04

6. What is meant by the "mode" of an amateur radio satellite?

E2D07

7. What digital protocol is used by APRS?

E8A07

8. What determines the PEP-to-average power ratio of an unprocessed single-sideband phone signal?

E8D10

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

E9D10

10. How does radiation resistance of a base-fed whip antenna change below its resonant frequency?

E5A12

11. What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?

E9F05

12. What is microstrip?

E2E13

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

E6D08

14. Which of the following materials has the highest temperature stability of its magnetic characteristics?

Figure

E9B05

15. What type of antenna pattern is shown in Figure E9-2?

E3C08

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

E1E02

17. Who is tasked by Part 97 with maintaining the pools of questions for all US amateur license examinations?

E4D10

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

E5B09

19. What is the relationship between the AC current through a capacitor and the voltage across a capacitor?

E8B05

20. What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 5 kHz if the highest modulation frequency is 3 kHz?

Figure

E6B10

21. In Figure E6-2, which is the schematic symbol for a Schottky diode?

E7B04

22. What is the operating point of a Class A common emitter amplifier?

E7C02

23. What is the frequency response of a T-network with series capacitors and a shunt inductor?

E0A09

24. Which of the following types of equipment are exempt from RF exposure evaluations?

E3B06

25. On which of the following amateur bands is long-path propagation most frequent?

E1D08

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

E9C10

27. Which of the following describes a Zepp antenna?

E7F06

28. What is the minimum number of bits required to sample a signal with a range of 1 volt at a resolution of 1 millivolt?

E5D11

29. How much real power is consumed in a circuit consisting of a 100-ohm resistor in series with a 100-ohm inductive reactance drawing 1 ampere?

E7E10

30. How does a diode envelope detector function?

E9H07

31. What is the function of a Beverage antenna's termination resistor?

E4E08

32. What current flows equally on all conductors of an unshielded multiconductor cable?

E5C01

33. Which of the following represents pure capacitive reactance of 100 ohms in rectangular notation?

E4A11

34. Which of the following can be measured with an antenna analyzer?

E9E05

35. What Yagi driven element feed point impedance is required to use a beta or hairpin matching system?

E1F01

36. On what frequencies are spread spectrum transmissions permitted?

E1B07

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

E9A04

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

E4C05

39. What does a receiver noise floor of -174 dBm represent?

E7H08

40. Which of the following components can be used to reduce thermal drift in crystal oscillators?

E1C08

41. What is the maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions?

E6F05

42. Which of the following describes an optical shaft encoder?

E7A02

43. What is the function of a decade counter?

E1A11

44. What licensing is required when operating an amateur station aboard a US-registered vessel in international waters?

E6E12

45. Why are DIP through-hole package ICs not typically used at UHF and higher frequencies?

Figure

E7D08

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

E4B09

47. Which of the following can be measured by a two-port vector network analyzer?

E2C09

48. What type of equipment is commonly used to implement an amateur radio mesh network?

Figure

E6A11

49. In Figure E6-1, which is the schematic symbol for a P-channel junction FET?

E7G03

50. What is the typical input impedance of an op-amp?