Practice Exam

Element 4: Extra (EXPIRED)

E9H01

1. What is the effective radiated power relative to a dipole of a repeater station with 150 watts transmitter power output, 2-dB feed line loss, 2.2-dB duplexer loss and 7-dBd antenna gain?

E0A10

2. What material found in some electronic components such as high-voltage capacitors and transformers is considered toxic?

E4B06

3. How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?

E5A07

4. What is the magnitude of the current at the input of a parallel RLC circuit at resonance?

E1D03

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

E2B07

6. What is the name of the signal component that carries color information in NTSC video?

E7B21

7. Which of the following devices is generally best suited for UHF or microwave power amplifier applications?

E8D12

8. What is the peak voltage of a sinusoidal waveform if an RMS-reading voltmeter reads 34 volts?

E8A01

9. What type of wave is made up of a sine wave plus all of its odd harmonics?

E2D03

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

E8B04

11. What is the modulation index of an FM-phone signal having a maximum carrier deviation of plus or minus 6 kHz when modulated with a 2-kHz modulating frequency?

E6F09

12. What is the efficiency of a photovoltaic cell?

Figure

E9G05

13. What type of chart is shown in Figure E9-3?

E1A02

14. 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?

E9E03

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

E4C07

16. What does the MDS of a receiver represent?

E3C02

17. What is the cause of Aurora activity?

E3A02

18. What characterizes libration fading of an Earth-Moon-Earth signal?

E1E10

19. What must the administering VEs do after the administration of a successful examination for an amateur operator license?

Figure

E9C07

20. What type of antenna pattern over real ground is shown in Figure E9-2?

E7F06

21. What is one purpose of a marker generator?

E1B09

22. Which amateur stations may be operated in RACES?

E7H06

23. Which of the following oscillator circuits are commonly used in VFOs?

E6C13

24. Which of the following is an advantage of BiCMOS logic?

E8C06

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

Figure

E5C20

26. Which point in Figure E5-2 best represents the impedance of a series circuit consisting of a 300 ohm resistor and an 18 microhenry inductor at 3.505 MHz?

E7E13

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

E6D14

28. Which is NOT true of a charge-coupled device (CCD)?

E9D06

29. Why should an HF mobile antenna loading coil have a high ratio of reactance to resistance?

E1F04

30. Which of the following geographic descriptions approximately describes "Line A"?

E3B03

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

E6E03

32. What is one aspect of the piezoelectric effect?

E5D15

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

E6A05

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

E2A08

35. Why should effective radiated power to a satellite which uses a linear transponder be limited?

E5B01

36. What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the applied voltage?

E7D04

37. Which of the following types of linear voltage regulator usually make the most efficient use of the primary power source?

E9A08

38. What is meant by antenna gain?

E9F07

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

E6B13

40. What type of bias is required for an LED to emit light?

E7C14

41. Which of these modes is most affected by non-linear phase response in a receiver IF filter?

E9B09

42. What type of computer program technique is commonly used for modeling antennas?

E4E13

43. What might be the cause of a loud roaring or buzzing AC line interference that comes and goes at intervals?

E4A11

44. Which of these instruments could be used for detailed analysis of digital signals?

E2E12

45. Which type of digital communication does not support keyboard-to-keyboard operation?

Figure

E7G10

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

E7A01

47. Which of the following is a bistable circuit?

E1C10

48. What types of amateur stations may automatically retransmit the radio signals of other amateur stations?

E4D12

49. What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?

E2C05

50. What is the function of a DX QSL Manager?