Practice Exam

Element 4: Extra

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E9G08

1. What is the process of normalization with regard to a Smith chart?

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E7D03

2. What device is typically used as a stable reference voltage in a linear voltage regulator?

E1D09

3. Which UHF amateur service bands have frequencies available for a space station?

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E2E01

4. Which type of modulation is common for data emissions below 30 MHz?

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E5C08

5. What coordinate system is often used to display the phase angle of a circuit containing resistance, inductive and/or capacitive reactance?

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E9C10

6. Which of the following describes a Zepp antenna?

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E7H11

7. What are the major spectral impurity components of direct digital synthesizers?

E1E14

8. For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed?

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E3A01

9. What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by Moon bounce?

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E9A07

10. What is meant by antenna gain?

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E9B10

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

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E8A06

12. What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?

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E7E06

13. Why is de-emphasis commonly used in FM communications receivers?

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E7C12

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

E1F03

15. Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?

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E6E07

16. Which of the following is typically used to construct a MMIC-based microwave amplifier?

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Figure

E7B11

17. In Figure E7-1, what is the purpose of R3?

E1A06

18. Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?

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E4C07

19. What does the MDS of a receiver represent?

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E9H08

20. What is the function of a sense antenna?

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E8B03

21. What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency when the modulating frequency is 1000 Hz?

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E7A04

22. How many flip-flops are required to divide a signal frequency by 4?

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E6A08

23. What term indicates the frequency at which the grounded-base current gain of a transistor has decreased to 0.7 of the gain obtainable at 1 kHz?

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E4B15

24. Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?

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E2D11

25. Which of the following data are used by the APRS network to communicate your location?

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E2A02

26. What is the direction of a descending pass for an amateur satellite?

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E3B01

27. What is transequatorial propagation?

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E8D12

28. What is the advantage of including a parity bit with an ASCII character stream?

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E2C11

29. How should you generally identify your station when attempting to contact a DX station during a contest or in a pileup?

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E4E03

30. Which of the following signals might a receiver noise blanker be able to remove from desired signals?

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E5B03

31. What happens to the phase angle of a reactance when it is converted to a susceptance?

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Figure

E7G09

32. What will be the output voltage of the circuit shown in Figure E7-4 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?

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E6C03

33. What is tri-state logic?

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E2B19

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

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E8C01

35. How is Forward Error Correction implemented?

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E5A09

36. How is the Q of an RLC parallel resonant circuit calculated?

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E4A09

37. When using a computer's soundcard input to digitize signals, what is the highest frequency signal that can be digitized without aliasing?

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E7F14

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

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E9E02

39. 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?

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E9F07

40. How does ladder line compare to small-diameter coaxial cable such as RG-58 at 50 MHz?

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E6F03

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

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E9D01

42. How does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?

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E4D07

43. Which describes the most significant effect of an off-frequency signal when it is causing cross-modulation interference to a desired signal?

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E3C04

44. What does the value of Bz (B sub Z) represent?

E1C06

45. Which of the following statements concerning remotely controlled amateur stations is true?

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Figure

E6B10

46. In Figure E6-3, what is the schematic symbol for a light-emitting diode?

E1B05

47. What is the National Radio Quiet Zone?

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E5D01

48. What is the result of skin effect?

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E0A03

49. Which of the following would be a practical way to estimate whether the RF fields produced by an amateur radio station are within permissible MPE limits?

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E6D10

50. What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?