Practice Exam

Element 4: Extra

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E5A12

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

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E5C05

2. What is the name of the diagram used to show the phase relationship between impedances at a given frequency?

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E9F14

3. What impedance does a 1/2 wavelength transmission line present to a generator when the line is shorted at the far end?

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E4B14

4. What happens if a dip meter is too tightly coupled to a tuned circuit being checked?

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E6D11

5. How many turns will be required to produce a 1-mH inductor using a core that has an inductance index (A L) value of 523 millihenrys/1000 turns?

E1E06

6. Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?

E1C03

7. How do the control operator responsibilities of a station under automatic control differ from one under local control?

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E4D03

8. How can intermodulation interference between two repeaters occur?

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E9A12

9. How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 6 dB gain over an isotropic antenna?

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E7B01

10. For what portion of a signal cycle does a Class AB amplifier operate?

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E2E01

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

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E8D08

12. What parameter might indicate that excessively high input levels are causing distortion in an AFSK signal?

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E4A08

13. Which of the following instrument would be best for measuring the SWR of a beam antenna?

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E7A11

14. What type of logic defines "1" as a high voltage?

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E9D10

15. 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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E7C09

16. What is a Jones filter as used as part of an HF receiver IF stage?

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E8A01

17. What is the name of the process that shows that a square wave is made up of a sine wave plus all of its odd harmonics?

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Figure

E7G10

18. What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 1800 ohms and RF is 68 kilohms?

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E5B03

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

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E3A07

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

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E7E12

21. What is a frequency discriminator stage in a FM receiver?

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E7F13

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

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E9H08

23. What is the function of a sense antenna?

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E3B09

24. At what time of year is Sporadic E propagation most likely to occur?

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E6C05

25. What is an advantage of CMOS logic devices over TTL devices?

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E2D13

26. What type of modulation is used for JT65 contacts?

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E9G02

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

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E7D03

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

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E2A03

29. What is the orbital period of an Earth satellite?

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E4E12

30. What is one disadvantage of using some types of automatic DSP notch-filters when attempting to copy CW signals?

E1A06

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

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E9B04

32. What may occur when a directional antenna is operated at different frequencies within the band for which it was designed?

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E9E09

33. Which of these matching systems is an effective method of connecting a 50 ohm coaxial cable feed line to a grounded tower so it can be used as a vertical antenna?

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E6E01

34. Which of the following is true of a charge-coupled device (CCD)?

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E8C11

35. What is the relationship between symbol rate and baud?

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E2B18

36. On which of the following frequencies is one likely to find FM ATV transmissions?

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E6B02

37. 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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E2C08

38. Which of the following contacts may be confirmed through the U.S. QSL bureau system?

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E8B10

39. What describes frequency division multiplexing?

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E5D18

40. 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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E6A17

41. What are the names of the three terminals of a field-effect transistor?

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E7H05

42. How is positive feedback supplied in a Pierce oscillator?

E1D07

43. Which amateur service HF bands have frequencies authorized for space stations?

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E3C13

44. What type of polarization is best for ground-wave propagation?

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E6F12

45. What absorbs the energy from light falling on a photovoltaic cell?

E1B11

46. What is the permitted mean power of any spurious emission relative to the mean power of the fundamental emission from a station transmitter or external RF amplifier installed after January 1, 2003 and transmitting on a frequency below 30 MHZ?

E1F09

47. Which of the following conditions apply when transmitting spread spectrum emission?

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E9C02

48. What is the radiation pattern of two 1/4 wavelength vertical antennas spaced 1/4 wavelength apart and fed 90 degrees out of phase?

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E0A01

49. What is the primary function of an external earth connection or ground rod?

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E4C01

50. What is an effect of excessive phase noise in the local oscillator section of a receiver?