Practice Exam

Element 4: Extra (EXPIRED)

E8B09

1. What is meant by deviation ratio?

Figure

E6A10

2. In Figure E6-2, what is the schematic symbol for an N-channel dual-gate MOSFET?

E1B01

3. Which of the following constitutes a spurious emission?

E8A05

4. What would be the most accurate way of measuring the RMS voltage of a complex waveform?

E1A02

5. When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the lowest frequency at which a properly adjusted LSB emission will be totally within the band?

E5B05

6. How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01-microfarad capacitor when a 2-megohm resistor is connected across it?

E4A04

7. Which of the following test instruments is used to display spurious signals from a radio transmitter?

E3C08

8. What is the name of the high-angle wave in HF propagation that travels for some distance within the F2 region?

E1F08

9. Which of the following types of amateur station communications are prohibited?

E2A01

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

E2B02

11. How many horizontal lines make up a fast-scan (NTSC) television frame?

Figure

E6C09

12. In Figure E6-5, what is the schematic symbol for an OR gate?

E7E03

13. How does an analog phase modulator function?

E4E01

14. Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?

E9C05

15. What are the disadvantages of a terminated rhombic antenna for the HF bands?

E4D06

16. What is the term for unwanted signals generated by the mixing of two or more signals?

E8D15

17. Which of the following is a typical value for the RMS voltage at a standard U.S. household electrical power outlet?

E6F01

18. What is photoconductivity?

E9D08

19. What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?

E5A09

20. What is the phase relationship between the current through and the voltage across a parallel resonant circuit at resonance?

E1D05

21. What class of licensee is authorized to be the control operator of a space station?

E1C09

22. Which of these frequencies are available for an automatically controlled repeater operating below 30 MHz?

E7F06

23. What is one purpose of a marker generator?

E9E07

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

Figure

E7B10

25. In Figure E7-1, what is the purpose of R1 and R2?

E6D13

26. What type of CRT deflection is better when high-frequency waveforms are to be displayed on the screen?

E7C11

27. 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 inductors in series and the capacitors in shunt at the input and output?

E3A06

28. What frequency range would you normally tune to find EME signals in the 2 meter band?

E7H09

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

E9A03

30. Which of the following antennas has no gain in any direction?

E5C03

31. In polar coordinates, what is the impedance of a network consisting of a 300-ohm-reactance capacitor, a 600-ohm-reactance inductor, and a 400-ohm resistor, all connected in series?

E4C07

32. What does the MDS of a receiver represent?

E3B10

33. What is the cause of gray-line propagation?

E1E11

34. What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?

E7A03

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

E2E08

36. Which of the following HF digital modes can be used to transfer binary files?

E7D14

37. What is one purpose of a "bleeder" resistor in a conventional (unregulated) power supply?

E6E07

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

E2C04

39. On which of the following frequencies is an amateur radio contest contact generally discouraged?

Figure

E9B02

40. In the antenna radiation pattern shown in Figure E9-1, what is the front-to-back ratio?

E4B11

41. How should a portable antenna analyzer be connected when measuring antenna resonance and feed point impedance?

E8C10

42. What spread-spectrum communications technique alters the center frequency of a conventional carrier many times per second in accordance with a pseudo-random list of channels?

E9F06

43. What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically one-half wavelength long at 14.10 MHz?

E9H05

44. What is the main drawback of a wire-loop antenna for direction finding?

E7G05

45. How can unwanted ringing and audio instability be prevented in a multi-section op-amp RC audio filter circuit?

E0A07

46. How may dangerous levels of carbon monoxide from an emergency generator be detected?

E2D03

47. Which of the following digital modes is especially useful for EME communications?

E9G11

48. How are the wavelength scales on a Smith chart calibrated?

E6B04

49. What type of semiconductor device is designed for use as a voltage-controlled capacitor?

E5D09

50. What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?