Practice Exam

Element 4: Extra

E6A03

1. Why does a PN-junction diode not conduct current when reverse biased?

E7F08

2. What is the function of decimation?

E9A13

3. What term describes station output, taking into account all gains and losses?

E2D01

4. Which of the following digital modes is designed for meteor scatter communications?

E2B08

5. What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70 cm band?

E7B15

6. What is one way to prevent thermal runaway in a bipolar transistor amplifier?

E2A01

7. What is the direction of an ascending pass for an amateur satellite?

E5B08

8. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 100 ohms, R is 100 ohms, and XL is 75 ohms?

E7E10

9. How does a diode envelope detector function?

E9F08

10. Which of the following is a significant difference between foam dielectric coaxial cable and solid dielectric cable, assuming all other parameters are the same?

E9D02

11. How can linearly polarized Yagi antennas be used to produce circular polarization?

E2E03

12. How is the timing of FT4 contacts organized?

E1F10

13. Who may be the control operator of an auxiliary station?

E8D11

14. What is one advantage of using ASCII code for data communications?

E1E08

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

E3A02

16. What characterizes libration fading of an EME signal?

Figure

E9G07

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

E4D10

18. What does a third-order intercept level of 40 dBm mean with respect to receiver performance?

E7C06

19. What are the distinguishing features of an elliptical filter?

E3B10

20. Why is chordal hop propagation desirable?

E6E02

21. Which of the following device packages is a through-hole type?

E3C13

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

E7H05

23. How is positive feedback supplied in a Pierce oscillator?

E9C11

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

E2C10

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

E9H05

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

Figure

E7G07

27. What magnitude of voltage gain can be expected from the circuit in Figure E7 3 when R1 is 10 ohms and RF is 470 ohms?

E6B03

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

E5D01

29. What is the result of skin effect?

E6C09

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

E6D10

31. What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?

E4C08

32. An SDR receiver is overloaded when input signals exceed what level?

E8B03

33. 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?

E8C02

34. What is the definition of symbol rate in a digital transmission?

E8A08

35. Why would a direct or flash conversion analog-to-digital converter be useful for a software defined radio?

E4B02

36. What is the significance of voltmeter sensitivity expressed in ohms per volt?

E1C06

37. Which of the following is required in order to operate in accordance with CEPT rules in foreign countries where permitted?

Figure

E5C12

38. Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz?

E1B12

39. What must the control operator of a repeater operating in the 70 cm band do if a radiolocation system experiences interference from that repeater?

E1A02

40. 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?

E4A02

41. Which of the following parameters does a spectrum analyzer display on the vertical and horizontal axes?

E5A05

42. What is the result of increasing the Q of an impedance-matching circuit?

E7A01

43. Which circuit is bistable?

E6F07

44. What is a solid-state relay?

E4E04

45. How can conducted and radiated noise caused by an automobile alternator be suppressed?

E9E07

46. What parameter describes the interactions at the load end of a mismatched transmission line?

Figure

E9B05

47. What type of antenna pattern is shown in Figure E9-2?

E0A04

48. 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?

E7D02

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

E1D11

50. Which amateur stations are eligible to operate as Earth stations?