Practice Exam

Element 4: Extra

E8D09

1. What is considered an acceptable maximum IMD level for an idling PSK signal?

E9F11

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

E6F04

3. What is the photovoltaic effect?

E7A10

4. What is a truth table?

E3C10

5. What does the 304A solar parameter measure?

E5A08

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

E1F09

7. Which of the following conditions apply when transmitting spread spectrum emissions?

E1D08

8. Which VHF amateur bands have frequencies authorized for space stations?

E6C02

9. What happens when the level of a comparator's input signal crosses the threshold?

E8A02

10. Which of the following is a type of analog-to-digital conversion?

E4D02

11. Which of the following describes problems caused by poor dynamic range in a receiver?

E6E03

12. Which of the following materials is likely to provide the highest frequency of operation when used in MMICs?

E9C10

13. Which of the following describes a Zepp antenna?

E7C03

14. What advantage does a series-L Pi-L-network have over a series-L Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

E7E10

15. How does a diode envelope detector function?

E0A11

16. Which of the following injuries can result from using high-power UHF or microwave transmitters?

E6D07

17. What is current in the primary winding of a transformer called if no load is attached to the secondary?

E4E02

18. Which of the following types of noise can often be reduced with a digital signal processing noise filter?

E7H15

19. Which of these functions can be performed by a phase-locked loop?

E7D14

20. What is the purpose of connecting equal-value resistors across power supply filter capacitors connected in series?

E9A01

21. What is an isotropic antenna?

Figure

E5C12

22. Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz?

E9E03

23. What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at or near the feed point?

E4B03

24. Which S parameter is equivalent to forward gain?

E6A12

25. Why do many MOSFET devices have internally connected Zener diodes on the gates?

E3B09

26. At what time of year is sporadic E propagation most likely to occur?

E2B05

27. Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?

E8C10

28. How may data rate be increased without increasing bandwidth?

E1B01

29. Which of the following constitutes a spurious emission?

E9D05

30. What usually occurs if a Yagi antenna is designed solely for maximum forward gain?

E7F11

31. What sets the minimum detectable signal level for a direct-sampling SDR receiver in the absence of atmospheric or thermal noise?

E1C02

32. Which of the following types of communications may be transmitted to amateur stations in foreign countries?

E2D05

33. What is one advantage of the JT65 mode?

Figure

E9G07

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

E7B06

35. Which of the following amplifier types reduces even-order harmonics?

E1A13

36. Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?

E2A02

37. Which of the following occurs when a satellite is using an inverting linear transponder?

E7G08

38. How does the gain of an ideal operational amplifier vary with frequency?

E4A04

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

E2E04

40. What is indicated when one of the ellipses in an FSK crossed-ellipse display suddenly disappears?

E1E11

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

E8B03

42. 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?

E3A01

43. What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by EME?

E9H09

44. What is a Pennant antenna?

E4C14

45. What transmit frequency might generate an image response signal in a receiver tuned to 14.300 MHz and that uses a 455 kHz IF frequency?

Figure

E9B02

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

E2C08

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

E5B06

48. What is susceptance?

E6B09

49. What is a common use for point-contact diodes?

E5D05

50. What is the power factor of an RL circuit having a 30-degree phase angle between the voltage and the current?