Practice Exam

Element 4: Extra

E1C05

1. When may an automatically controlled station originate third party communications?

E9C02

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

E8A08

3. What is the period of a wave?

E7H13

4. What is the capture range of a phase-locked loop circuit?

E4A04

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

E0A01

6. What, if any, are the differences between the radiation produced by radioactive materials and the electromagnetic energy radiated by an antenna?

E8C06

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

E6E12

8. What is a "Jones filter" as used as part of a HF receiver IF stage?

E2E03

9. How is Forward Error Correction implemented?

E5B02

10. 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?

E1D07

11. Which amateur service HF bands have frequencies authorized to space stations?

E5A14

12. What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?

E2B02

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

E4B02

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

E3C04

15. Which emission mode is best for Aurora propagation?

E6A14

16. How does DC input impedance at the gate of a field-effect transistor compare with the DC input impedance of a bipolar transistor?

E5D15

17. What is the power factor of an RL circuit having a 45 degree phase angle between the voltage and the current?

E7A06

18. What is a characteristic of a monostable multivibrator?

E4C02

19. Which of the following portions of a receiver can be effective in eliminating image signal interference?

E7C08

20. What kind of digital signal processing audio filter might be used to remove unwanted noise from a received SSB signal?

E9D05

21. Where should a high-Q loading coil be placed to minimize losses in a shortened vertical antenna?

E7F06

22. What is one purpose of a marker generator?

E9B06

23. If the boom of a Yagi antenna is lengthened and the elements are properly retuned, what usually occurs?

E1B03

24. Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?

E1A04

25. With your transceiver displaying the carrier frequency of phone signals, you hear a DX station calling CQ on 3.601 MHz LSB. Is it legal to return the call using lower sideband on the same frequency?

E2D01

26. Which of the following digital modes is especially designed for use for meteor scatter signals?

E9H10

27. How can the output voltage of a multi-turn receiving loop antenna be increased?

E7D02

28. What is one characteristic of a switching electronic voltage regulator?

E1E11

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

E9E07

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

E4D01

31. What is meant by the blocking dynamic range of a receiver?

E9A12

32. Which of the following factors determines ground losses for a ground-mounted vertical antenna operating in the 3-30 MHz range?

Figure

E6C09

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

E7E03

34. How does an analog phase modulator function?

E6B08

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

E7B18

36. Which of the following is a characteristic of a grounded-grid amplifier?

E2A13

37. What type of satellite appears to stay in one position in the sky?

E6D07

38. What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used?

E1F02

39. Which of the following operating arrangements allows an FCC-licensed US citizen to operate in many European countries, and alien amateurs from many European countries to operate in the US?

E6F03

40. What is the most common configuration of an optoisolator or optocoupler?

E9F08

41. What is the term for the ratio of the actual speed at which a signal travels through a transmission line to the speed of light in a vacuum?

E2C07

42. What is the Cabrillo format?

E7G13

43. What is meant by the term op-amp input-offset voltage?

E5C09

44. When using rectangular coordinates to graph the impedance of a circuit, what does the horizontal axis represent?

E4E01

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

E3A08

46. When a meteor strikes the Earth's atmosphere, a cylindrical region of free electrons is formed at what layer of the ionosphere?

E9G09

47. What third family of circles is often added to a Smith chart during the process of solving problems?

E3B02

48. What is the approximate maximum range for signals using transequatorial propagation?

E8B08

49. What parameter does the modulating signal vary in a pulse-position modulation system?

E8D03

50. What input-amplitude parameter is valuable in evaluating the signal-handling capability of a Class A amplifier?