Practice Exam

Element 4: Extra (Expires Jun 30)

WARNING: This question pool expires in 35 days.

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E7F15

1. Which of the following is an advantage of a Finite Impulse Response (FIR) filter vs an Infinite Impulse Response (IIR) digital filter?

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E4C16

2. Which of the following is caused by missing codes in an SDR receiver's analog-to-digital converter?

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E8C03

3. When performing phase shift keying, why is it advantageous to shift phase precisely at the zero crossing of the RF carrier?

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E4A11

4. Which of the following is good practice when using an oscilloscope probe?

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E3C08

5. What does the space weather term G5 mean?

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E0A09

6. Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled?

E1A11

7. Which of the following describes authorization or licensing required when operating an amateur station aboard a U.S.-registered vessel in international waters?

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E6B06

8. Which of the following is a common use of a hot-carrier diode?

E1C11

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

E1E02

10. Where are the questions for all written U.S. amateur license examinations listed?

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E4D07

11. Which describes the most significant effect of an off-frequency signal when it is causing cross-modulation interference to a desired signal?

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E5D11

12. What is the power factor of an R-L circuit having a 60 degree phase angle between the voltage and the current?

E1F09

13. Which of the following conditions apply when transmitting spread spectrum emission?

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E9A11

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

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E7E02

15. What is the function of a reactance modulator?

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E3A02

16. What characterizes libration fading of an EME signal?

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E9E01

17. What system matches a higher impedance transmission line to a lower impedance antenna by connecting the line to the driven element in two places spaced a fraction of a wavelength each side of element center?

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E8B03

18. 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?

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E6E11

19. What is a characteristic of DIP packaging used for integrated circuits?

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E2C01

20. Which of the following is true about contest operating?

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E9G08

21. What is the process of normalization with regard to a Smith chart?

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E9B12

22. What is the far field of an antenna?

E1D05

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

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E7G01

24. What is the typical output impedance of an integrated circuit op-amp?

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Figure

E7B10

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

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E6D12

26. What is the definition of saturation in a ferrite core inductor?

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E2A11

27. What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?

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E8D12

28. What is the advantage of including a parity bit with an ASCII character stream?

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E5B05

29. What happens to the magnitude of a reactance when it is converted to a susceptance?

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E4E03

30. Which of the following signals might a receiver noise blanker be able to remove from desired signals?

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E7C02

31. Which of the following is a property of a T-network with series capacitors and a parallel shunt inductor?

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E6F04

32. What is the photovoltaic effect?

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E2B19

33. What special operating frequency restrictions are imposed on slow scan TV transmissions?

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E5C01

34. Which of the following represents a capacitive reactance in rectangular notation?

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E8A02

35. What type of wave has a rise time significantly faster than its fall time (or vice versa)?

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E4B01

36. Which of the following factors most affects the accuracy of a frequency counter?

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E9C08

37. What is a folded dipole antenna?

E1B07

38. What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?

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E9F03

39. Why is the physical length of a coaxial cable transmission line shorter than its electrical length?

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E5A02

40. What is resonance in an electrical circuit?

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E9H01

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

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E6A12

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

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E3B08

43. What type of HF propagation is probably occurring if radio signals travel along the terminator between daylight and darkness?

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E7H14

44. What is a phase-locked loop circuit?

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E7D03

45. What device is typically used as a stable reference voltage in a linear voltage regulator?

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E2D13

46. What type of modulation is used for JT65 contacts?

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E9D11

47. Which of the following types of conductors would be best for minimizing losses in a station's RF ground system?

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E2E03

48. How is the timing of JT65 contacts organized?

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E7A11

49. What type of logic defines "1" as a high voltage?

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E6C03

50. What is tri-state logic?