Practice Exam

Element 4: Extra (EXPIRED)

E2C04

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

E9B13

2. What does the abbreviation NEC stand for when applied to antenna modeling programs?

E1E08

3. To which of the following examinees may a VE not administer an examination?

E1D03

4. What is a telecommand station in the amateur satellite service?

E3C13

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

E7B17

6. Why are third-order intermodulation distortion products of particular concern in linear power amplifiers?

Figure

E7D11

7. What is the purpose of R1 in the circuit shown in Figure E7-3?

E2D07

8. Which of the following digital protocols is used by APRS?

Figure

E9G07

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

E9A10

10. How is antenna efficiency calculated?

E5D14

11. What is reactive power?

E4C06

12. A CW receiver with the AGC off has an equivalent input noise power density of -174 dBm/Hz. What would be the level of an unmodulated carrier input to this receiver that would yield an audio output SNR of 0 dB in a 400 Hz noise bandwidth?

E8D15

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

E9C12

14. When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?

Figure

E6B10

15. In Figure E6-3, what is the schematic symbol for a light-emitting diode?

E4B03

16. If a frequency counter with a specified accuracy of +/- 1.0 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

E2E01

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

E9F07

18. How does ladder line compare to small-diameter coaxial cable such as RG-58 at 50 MHz?

E9H05

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

E9D07

20. What is a disadvantage of using a multiband trapped antenna?

E1C05

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

E7G04

22. Which of the following is a type of capacitor best suited for use in high-stability op-amp RC active filter circuits?

E6E09

23. Which of the following must be done to insure that a crystal oscillator provides the frequency specified by the crystal manufacturer?

E5A11

24. 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?

E2A07

25. Which of the following types of signals can be relayed through a linear transponder?

E1F14

26. Under what circumstances might the FCC issue a "Special Temporary Authority" (STA) to an amateur station?

E6C02

27. What logic state do the inputs of a TTL device assume if they are left open?

E2B04

28. What is blanking in a video signal?

E7E13

29. Which of the following describes a common means of generating an SSB signal when using digital signal processing?

E4E06

30. What is a major cause of atmospheric static?

E8B01

31. What is the term for the ratio between the frequency deviation of an RF carrier wave, and the modulating frequency of its corresponding FM-phone signal?

E4A02

32. Which of the following parameters would a spectrum analyzer display on the horizontal axis?

E1B09

33. Which amateur stations may be operated in RACES?

E9E06

34. What is the equivalent lumped-constant network for a hairpin matching system on a 3-element Yagi?

E6D11

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

E3B03

36. What is the best time of day for transequatorial propagation?

E3A07

37. What frequency range would you normally tune to find EME signals in the 70 cm band?

E6A05

38. What is the alpha of a bipolar junction transistor?

E0A04

39. When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations?

E8C04

40. What technique is used to minimize the bandwidth requirements of a PSK31 signal?

E5C06

41. In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance capacitor in series with a 100-ohm resistor?

E7A06

42. What is a characteristic of a monostable multivibrator?

E5B07

43. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 500 ohms, R is 1 kilohm, and XL is 250 ohms?

E1A06

44. Which of the following describes the rules for operation on the 60 meter band?

E4D14

45. Which of the following is a way to reduce the likelihood of receiver desensitization?

E6F08

46. Why are optoisolators often used in conjunction with solid state circuits when switching 120 VAC?

E7C04

47. How does an impedance-matching circuit transform a complex impedance to a resistive impedance?

E7H08

48. What is a Gunn diode oscillator?

E7F09

49. What is the purpose of a frequency counter?

E8A04

50. What is equivalent to the root-mean-square value of an AC voltage?