Practice Exam

Element 4: Extra

E9F01

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

E3A09

2. Which of the following frequency ranges is well suited for meteor-scatter communications?

E2C06

3. During a VHF/UHF contest, in which band segment would you expect to find the highest level of activity?

E9E11

4. What is an effective way of matching a feed line to a VHF or UHF antenna when the impedances of both the antenna and feed line are unknown?

E9G03

5. Which of the following is often determined using a Smith chart?

E6C12

6. What is BiCMOS logic?

E1A07

7. What is the only amateur band where transmission on specific channels rather than a range of frequencies is permitted?

E7A06

8. What is a characteristic of a monostable multivibrator?

E4B03

9. 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?

E4D07

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

E7C02

11. A T-network with series capacitors and a parallel shunt inductor has which of the following properties?

E6E03

12. What is one aspect of the piezoelectric effect?

Figure

E5C19

13. Which point on Figure E5-2 best represents that impedance of a series circuit consisting of a 400 ohm resistor and a 38 picofarad capacitor at 14 MHz?

E2E03

14. How is Forward Error Correction implemented?

E3B03

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

E1D02

16. What is the amateur satellite service?

E5D10

17. How can the true power be determined in an AC circuit where the voltage and current are out of phase?

Figure

E7B11

18. In Figure E7-1, what is the purpose of R3?

E2A10

19. Why may the received signal from an amateur satellite exhibit a rapidly repeating fading effect?

E6F10

20. What is the most common type of photovoltaic cell used for electrical power generation?

E5A01

21. What can cause the voltage across reactances in series to be larger than the voltage applied to them?

E8C12

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

E5B02

23. What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial voltage?

E0A02

24. When evaluating RF exposure levels from your station at a neighbor's home, what must you do?

E8A05

25. What would be the most accurate way of measuring the RMS voltage of a complex waveform?

E9H11

26. What characteristic of a cardioid-pattern antenna is useful for direction finding?

E8D16

27. What is the RMS value of a 340-volt peak-to-peak pure sine wave?

E9C06

28. What is the effect of a terminating resistor on a rhombic antenna?

E1C08

29. What is the maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions?

E7F05

30. Which of the following is a technique for providing high stability oscillators needed for microwave transmission and reception?

E3C08

31. What is the name of the high-angle wave in HF propagation that travels for some distance within the F2 region?

E6B11

32. What is used to control the attenuation of RF signals by a PIN diode?

E4A05

33. Which of the following test instruments is used to display intermodulation distortion products in an SSB transmission?

E7G08

34. How does the gain of an ideal operational amplifier vary with frequency?

E2B10

35. Which of the following is an acceptable bandwidth for Digital Radio Mondiale (DRM) based voice or SSTV digital transmissions made on the HF amateur bands?

E7H10

36. What information is contained in the lookup table of a direct digital frequency synthesizer?

E4C14

37. On which of the following frequencies might a signal be transmitting which is generating a spurious image signal in a receiver tuned to 14.300 MHz and which uses a 455 kHz IF frequency?

E7E01

38. Which of the following can be used to generate FM phone emissions?

E9D15

39. Which of the following would provide the best RF ground for your station?

E6A02

40. Which of the following semiconductor materials contains excess free electrons?

Figure

E7D07

41. What is the purpose of C2 in the circuit shown in Figure E7-3?

E4E03

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

E9B07

43. How does the total amount of radiation emitted by a directional gain antenna compare with the total amount of radiation emitted from an isotropic antenna, assuming each is driven by the same amount of power?

E2D08

44. Which of the following types of packet frames is used to transmit APRS beacon data?

E6D14

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

E1E12

46. What must the VE team do with the application form if the examinee does not pass the exam?

E9A03

47. Which of the following antennas has no gain in any direction?

E1B07

48. Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?

E8B12

49. What is digital time division multiplexing?

E1F13

50. What types of communications may be transmitted to amateur stations in foreign countries?