Practice Exam

Element 4: Extra

E2C10

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

E1D08

2. Which VHF amateur service bands have frequencies available for space stations?

E9F05

3. 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?

E7H04

4. How is positive feedback supplied in a Colpitts oscillator?

E9H06

5. What is the triangulation method of direction finding?

E7G02

6. What is the effect of ringing in a filter?

E8B08

7. What parameter does the modulating signal vary in a pulse-position modulation system?

E9C02

8. What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?

E6B07

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

E4C08

10. How might lowering the noise figure affect receiver performance?

E1E09

11. What may be the penalty for a VE who fraudulently administers or certifies an examination?

E7F10

12. What alternate method of determining frequency, other than by directly counting input pulses, is used by some counters?

E1A11

13. What authorization or licensing is required when operating an amateur station aboard a US-registered vessel in international waters?

E2D11

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

E1C03

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

Figure

E6A10

16. In Figure E6-2, what is the schematic symbol for an N-channel dual-gate MOSFET?

E3B07

17. Which of the following could account for hearing an echo on the received signal of a distant station?

E2E01

18. Which type of modulation is common for data emissions below 30 MHz?

E3A03

19. When scheduling EME contacts, which of these conditions will generally result in the least path loss?

E0A11

20. Which of the following injuries can result from using high-power UHF or microwave transmitters?

E4B08

21. Which of the following is a characteristic of a good DC voltmeter?

E1F02

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

E6F04

23. What is the photovoltaic effect?

E2A11

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

E9B05

25. What usually occurs if a Yagi antenna is designed solely for maximum forward gain?

E4E13

26. What might be the cause of a loud roaring or buzzing AC line interference that comes and goes at intervals?

E7D04

27. Which of the following types of linear voltage regulator usually make the most efficient use of the primary power source?

E7E12

28. What is a frequency discriminator stage in a FM receiver?

E5B11

29. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 50 ohms?

E8C11

30. What spread-spectrum communications technique uses a high speed binary bit stream to shift the phase of an RF carrier?

E6D07

31. What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used?

E5C01

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

E7C09

33. What type of digital signal processing filter might be used to generate an SSB signal?

E3C02

34. What is the cause of Aurora activity?

E5A06

35. What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?

E2B15

36. What signals SSTV receiving equipment to begin a new picture line?

E9D08

37. What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?

E5D13

38. How much power is consumed in a circuit consisting of a 100 ohm resistor in series with a 100 ohm inductive reactance drawing 1 ampere?

E6C13

39. Which of the following is an advantage of BiCMOS logic?

E4A10

40. Which of the following tests establishes that a silicon NPN junction transistor is biased on?

E1B06

41. Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?

E7B02

42. What is a Class D amplifier?

E7A12

43. What is the name for logic which represents a logic "0" as a high voltage?

E9E05

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

Figure

E9G07

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

E6E04

46. What is the most common input and output impedance of circuits that use MMICs?

E8A03

47. What type of wave is made up of sine waves of a given fundamental frequency plus all its harmonics?

E9A15

48. What is meant by the radiation resistance of an antenna?

E8D09

49. What is meant by circularly polarized electromagnetic waves?

E4D01

50. What is meant by the blocking dynamic range of a receiver?