Practice Exam

Element 4: Extra

E6D09

1. What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of transistorized HF amplifiers?

E1D02

2. What is the amateur satellite service?

E3C06

3. By how much does the VHF/UHF radio-path horizon distance exceed the geometric horizon?

E9F05

4. What is the approximate physical length of a solid polyethylene dielectric coaxial transmission line that is electrically one-quarter wavelength long at 14.1 MHz?

E1F12

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

E5A15

6. What is the resonant frequency of a series RLC circuit if R is 56 ohms, L is 40 microhenrys and C is 200 picofarads?

E2A05

7. What do the letters in a satellite's mode designator specify?

E1B08

8. What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receiver(s) involved are of good engineering design?

E8A02

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

E0A04

10. 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?

E8D12

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

E7C07

12. What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?

E4C12

13. What is an undesirable effect of using too wide a filter bandwidth in the IF section of a receiver?

E5B06

14. How long does it take for an initial charge of 800 V DC to decrease to 294 V DC in a 450-microfarad capacitor when a 1-megohm resistor is connected across it?

E9H11

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

E2E08

16. Which of the following HF digital modes can be used to transfer binary files?

E7A14

17. What is a JK flip-flop?

E4A03

18. Which of the following parameters would a spectrum analyzer display on the vertical axis?

E5D09

19. What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?

E7F08

20. Which of the following is performed by a frequency counter?

E5C06

21. In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance capacitor in series with a 100-ohm resistor?

E3B01

22. What is transequatorial propagation?

E9A02

23. How much gain does a 1/2-wavelength dipole in free space have compared to an isotropic antenna?

E7B06

24. Which of the following amplifier types reduces or eliminates even-order harmonics?

E6C05

25. Which of the following is an advantage of CMOS logic devices over TTL devices?

E2C11

26. How should you generally identify your station when attempting to contact a DX station working a pileup or in a contest?

E7H06

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

E1A05

28. What is the maximum power output permitted on the 60 meter band?

E6B07

29. What is the failure mechanism when a junction diode fails due to excessive current?

E4B04

30. If a frequency counter with a specified accuracy of +/- 0.1 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

Figure

E7G07

31. What magnitude of voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?

E4E01

32. Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?

E1C03

33. How do the control operator responsibilities of a station under automatic control differ from one under local control?

E6F10

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

E1E01

35. What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?

E6E12

36. What is a "Jones filter" as used as part of a HF receiver IF stage?

E8B11

37. Which of the following describes frequency division multiplexing?

E9G11

38. How are the wavelength scales on a Smith chart calibrated?

E4D08

39. What causes intermodulation in an electronic circuit?

E6A02

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

E9D15

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

E7E09

42. What occurs when an excessive amount of signal energy reaches a mixer circuit?

E8C08

43. What term describes a wide-bandwidth communications system in which the transmitted carrier frequency varies according to some predetermined sequence?

E2B16

44. Which of the following is the video standard used by North American Fast Scan ATV stations?

Figure

E9C07

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

E9B12

46. What is the far-field of an antenna?

E2D11

47. Which of the following data are used by the APRS network to communicate your location?

Figure

E7D08

48. What type of circuit is shown in Figure E7-3?

E3A05

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

E9E05

50. How must the driven element in a 3-element Yagi be tuned to use a hairpin matching system?