Practice Exam

Element 4: Extra

E3A06

1. What might help to restore contact when DX signals become too weak to copy across an entire HF band a few hours after sunset?

E8B09

2. What is deviation ratio?

E7B07

3. Which of the following is a likely result when a Class C amplifier is used to amplify a single-sideband phone signal?

E1F11

4. Which of the following best describes one of the standards that must be met by an external RF power amplifier if it is to qualify for a grant of FCC certification?

E1D08

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

E1E07

6. What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?

E8D07

7. What is a common cause of overmodulation of AFSK signals?

E7D02

8. What is a characteristic of a switching electronic voltage regulator?

E1C01

9. What is the maximum bandwidth for a data emission on 60 meters?

E6A06

10. What is the beta of a bipolar junction transistor?

E2A04

11. What is meant by the term "mode" as applied to an amateur radio satellite?

E5B07

12. 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?

E7C09

13. What is a crystal lattice filter?

E9B09

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

E2E05

15. Which of these digital modes does not support keyboard-to-keyboard operation?

E3C12

16. How does the maximum range of ground-wave propagation change when the signal frequency is increased?

E3B06

17. Which of the following amateur bands most frequently provides long-path propagation?

E7F09

18. Why is an anti-aliasing digital filter required in a digital decimator?

E2D06

19. Which of the following describes a method of establishing EME contacts?

E6C09

20. What is a Programmable Logic Device (PLD)?

E9D08

21. What happens as the Q of an antenna increases?

E7E11

22. Which type of detector circuit is used for demodulating SSB signals?

E9A07

23. What is the effective isotropic radiated power of a repeater station with 200 watts transmitter power output, 2 dB feed line loss, 2.8 dB duplexer loss, 1.2 dB circulator loss, and 7 dBi antenna gain?

E6D11

24. Which type of core material decreases inductance when inserted into a coil?

E9G04

25. What are the two families of circles and arcs that make up a Smith chart?

E1B10

26. What frequencies are authorized to an amateur station operating under RACES rules?

E9F01

27. What is the velocity factor of a transmission line?

E4C12

28. Which of the following has the largest effect on an SDR receiver's dynamic range?

E2C10

29. Why might a DX station state that they are listening on another frequency?

E6B05

30. What characteristic of a PIN diode makes it useful as an RF switch?

E9E03

31. 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?

E6E12

32. Why are DIP through-hole package ICs not typically used at UHF and higher frequencies?

E6F01

33. What absorbs the energy from light falling on a photovoltaic cell?

E7A01

34. Which circuit is bistable?

E0A04

35. 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?

E7G02

36. What is ringing in a filter?

E4E07

37. Which of the following can cause shielded cables to radiate or receive interference?

E2B06

38. What is vestigial sideband modulation?

E5D14

39. What is reactive power?

E9H10

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

E8A11

41. Which of the following is a measure of the quality of an analog-to-digital converter?

E5A14

42. What is the resonant frequency of an RLC circuit if R is 22 ohms, L is 50 microhenries and C is 40 picofarads?

E7H03

43. How is positive feedback supplied in a Hartley oscillator?

E9C11

44. How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus soil?

E4A08

45. Which of the following measures SWR?

E4B11

46. Which of the following can be measured with a vector network analyzer?

E1A03

47. What is the maximum legal carrier frequency on the 20 meter band for transmitting USB AFSK digital signals having a 1 kHz bandwidth?

E5C04

48. What coordinate system is often used to display the resistive, inductive, and/or capacitive reactance components of impedance?

E8C09

49. Which digital code allows only one bit to change between sequential code values?

E4D06

50. What is the term for spurious signals generated by the combination of two or more signals in a non-linear device or circuit?