Practice Exam

Element 4: Extra

E1D09

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

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E5B10

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

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E6C09

3. What is a Programmable Logic Device (PLD)?

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E4B02

4. What is an advantage of using a bridge circuit to measure impedance?

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E3C15

5. What might a sudden rise in radio background noise indicate?

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E7H09

6. What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital to analog converter, and a low-pass anti-alias filter?

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E2A01

7. What is the direction of an ascending pass for an amateur satellite?

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E2B16

8. Which is a video standard used by North American Fast Scan ATV stations?

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E7A03

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

E1B10

10. What frequencies are authorized to an amateur station operating under RACES rules?

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E4E14

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

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E5C13

12. What coordinate system is often used to display the resistive, inductive, and/or capacitive reactance components of impedance?

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E3B12

13. What is the primary characteristic of chordal hop propagation?

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E4C07

14. What does the MDS of a receiver represent?

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E4A07

15. Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge to measure antenna SWR?

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E8C03

16. When performing phase shift keying, why is it advantageous to shift phase precisely at the zero crossing of the RF carrier?

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E6B08

17. Which of the following describes a type of semiconductor diode?

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E7B17

18. Why are odd-order rather than even-order intermodulation distortion products of concern in linear power amplifiers?

E1C12

19. What types of communications may be transmitted to amateur stations in foreign countries?

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E6D01

20. How many turns will be required to produce a 5-microhenry inductor using a powdered-iron toroidal core that has an inductance index (A L) value of 40 microhenrys/100 turns?

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E5D11

21. What is the power factor of an R-L circuit having a 60 degree phase angle between the voltage and the current?

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E5A04

22. What is the magnitude of the impedance of a circuit with a resistor, an inductor and a capacitor all in parallel, at resonance?

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E8A08

23. Why would a direct or flash conversion analog-to-digital converter be useful for a software defined radio?

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E4D11

24. Why are third-order intermodulation products created within a receiver of particular interest compared to other products?

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E9A07

25. What is meant by antenna gain?

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E9E07

26. What term best describes the interactions at the load end of a mismatched transmission line?

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E0A02

27. When evaluating RF exposure levels from your station at a neighbor's home, what must you do?

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E8D12

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

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E2E10

29. Which of these digital modes has the narrowest bandwidth?

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E8B01

30. What is the term for the ratio between the frequency deviation of an RF carrier wave and the modulating frequency of its corresponding FM-phone signal?

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E7E03

31. How does an analog phase modulator function?

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E7C11

32. Which of the following is the common name for a filter network which is equivalent to two L-networks connected back-to-back with the two inductors in series and the capacitors in shunt at the input and output?

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E7F06

33. What is the minimum number of bits required for an analog-to-digital converter to sample a signal with a range of 1 volt at a resolution of 1 millivolt?

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E9F10

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

E1E04

35. Which of the following best describes the Volunteer Examiner accreditation process?

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Figure

E9G07

36. On the Smith chart shown in Figure E9-3, what is the only straight line shown?

E1A03

37. With your transceiver displaying the carrier frequency of phone signals, you hear a station calling CQ on 14.349 MHz USB. Is it legal to return the call using upper sideband on the same frequency?

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E6F06

38. Which of these materials is affected the most by photoconductivity?

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E9C03

39. What is the radiation pattern of two 1/4 wavelength vertical antennas spaced a 1/2 wavelength apart and fed in phase?

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E9D10

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

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E2D09

41. Which of these digital modes has the fastest data throughput under clear communication conditions?

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Figure

E7G07

42. What magnitude of voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?

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E9B10

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

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E6E11

44. What is a characteristic of DIP packaging used for integrated circuits?

E1F06

45. Under what circumstances might the FCC issue a Special Temporary Authority (STA) to an amateur station?

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E6A07

46. Which of the following indicates that a silicon NPN junction transistor is biased on?

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E2C11

47. 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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E7D13

48. What is the equation for calculating power dissipation by a series connected linear voltage regulator?

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E9H10

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

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E3A01

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