Practice Exam

Element 4: Extra

E1B06

1. Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?

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E9C06

2. What is the effect of a terminating resistor on a rhombic antenna?

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E7F02

3. What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal?

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E8B09

4. What is meant by deviation ratio?

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E9F11

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

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E6E10

6. What is the packaging technique in which leadless components are soldered directly to circuit boards?

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E6F01

7. What is photoconductivity?

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E6D01

8. 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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E8D06

9. Which of the following indicates likely overmodulation of an AFSK signal such as PSK or MFSK?

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E2E06

10. What is the most common data rate used for HF packet?

E1F03

11. 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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E4B05

12. If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

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E0A08

13. What does SAR measure?

E1C08

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

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E7B08

15. How can an RF power amplifier be neutralized?

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E9H10

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

E1E13

17. Which of these choices is an acceptable method for monitoring the applicants if a VEC opts to conduct an exam session remotely?

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E2D08

18. What type of packet frame is used to transmit APRS beacon data?

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E9D01

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

E1A08

20. If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?

E1D09

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

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E2A08

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

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E7E01

23. Which of the following can be used to generate FM phone emissions?

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E8C06

24. What is the necessary bandwidth of a 170-hertz shift, 300-baud ASCII transmission?

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E6C13

25. Which of the following is an advantage of BiCMOS logic?

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E3C07

26. Which of the following descriptors indicates the greatest solar flare intensity?

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E9E13

27. What is a use for a Wilkinson divider?

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E7C10

28. Which of the following filters would be the best choice for use in a 2 meter repeater duplexer?

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E6B02

29. What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?

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E4E11

30. Which is the most likely cause if you are hearing combinations of local AM broadcast signals within one or more of the MF or HF ham bands?

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E2B06

31. What is vestigial sideband modulation?

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E4D07

32. 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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E7H14

33. What is a phase-locked loop circuit?

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E7D15

34. What is the purpose of a "step-start" circuit in a high voltage power supply?

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E3B06

35. Which of the following amateur bands most frequently provides long-path propagation?

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E5D18

36. How many watts are consumed in a circuit having a power factor of 0.71 if the apparent power is 500VA?

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E7G03

37. What is the typical input impedance of an integrated circuit op-amp?

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E7A08

38. What logical operation does an OR gate perform?

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E5C04

39. Which of the following represents a capacitive reactance in polar coordinates?

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E8A13

40. Which of these methods is commonly used to convert analog signals to digital signals?

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E2C06

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

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Figure

E9G07

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

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E6A08

43. 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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E4A13

44. How is the compensation of an oscilloscope probe typically adjusted?

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E9A17

45. What is the effective radiated power of a repeater station with 200 watts transmitter power output, 2 dB feed line loss, 2.8 dB duplexer loss, 1.2 dB circulator loss, and 7 dBi antenna gain?

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Figure

E9B06

46. What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?

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E5B02

47. What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial voltage?

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E3A15

48. What is an electromagnetic wave?

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E5A11

49. What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?

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E4C12

50. What is an undesirable effect of using too wide a filter bandwidth in the IF section of a receiver?