Practice Exam

Element 4: Extra

E9A15

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

E7D05

2. Which of the following types of linear voltage regulator places a constant load on the unregulated voltage source?

E8C07

3. What is the necessary bandwidth of a 4800-Hz frequency shift, 9600-baud ASCII FM transmission?

E6D15

4. What is the principle advantage of liquid-crystal display (LCD) devices over other types of display devices?

E5D18

5. How many watts are consumed in a circuit having a power factor of 0.71 if the apparent power is 500 VA?

E5A03

6. What is the magnitude of the impedance of a series RLC circuit at resonance?

E7H16

7. Why is the short-term stability of the reference oscillator important in the design of a phase locked loop (PLL) frequency synthesizer?

E4B13

8. How is the compensation of an oscilloscope probe typically adjusted?

E9C12

9. When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?

E7F09

10. What is the purpose of a frequency counter?

E4D01

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

E7G15

12. What is the typical output impedance of an integrated circuit op-amp?

E3C08

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

E8D03

14. What input-amplitude parameter is valuable in evaluating the signal-handling capability of a Class A amplifier?

E1F13

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

E7C05

16. Which filter type is described as having ripple in the passband and a sharp cutoff?

E2B01

17. How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?

E2E02

18. What do the letters FEC mean as they relate to digital operation?

Figure

E9G07

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

E3A07

20. What frequency range would you normally tune to find EME signals in the 70 cm band?

E7B02

21. What is a Class D amplifier?

E1A03

22. With your transceiver displaying the carrier frequency of phone signals, you hear a DX station's CQ on 14.349 MHz USB. Is it legal to return the call using upper sideband on the same frequency?

E1D08

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

E7E01

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

E1E10

25. What must the administering VEs do after the administration of a successful examination for an amateur operator license?

E2C11

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

Figure

E6B10

27. In Figure E6-3, what is the schematic symbol for a light-emitting diode?

E4E07

28. How can you determine if line noise interference is being generated within your home?

E9D05

29. Where should a high-Q loading coil be placed to minimize losses in a shortened vertical antenna?

E4A03

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

E9H01

31. What is the effective radiated power relative to a dipole of a repeater station with 150 watts transmitter power output, 2-dB feed line loss, 2.2-dB duplexer loss and 7-dBd antenna gain?

E6E07

32. Which of the following techniques is typically used to construct a MMIC-based microwave amplifier?

E5C18

33. In polar coordinates, what is the impedance of a series circuit consisting of a resistance of 4 ohms, an inductive reactance of 4 ohms, and a capacitive reactance of 1 ohm?

E8B06

34. What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?

E1C01

35. What is a remotely controlled station?

E6F10

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

E9F02

37. Which of the following determines the velocity factor of a transmission line?

E5B05

38. How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01-microfarad capacitor when a 2-megohm resistor is connected across it?

E1B06

39. 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?

E9E03

40. What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at the feed point?

Figure

E6C08

41. In Figure E6-5, what is the schematic symbol for a NAND gate?

E3B11

42. Which of the following describes gray-line propagation?

E4C11

43. Which of the following is a desirable amount of selectivity for an amateur SSB phone receiver?

E2A04

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

E2D11

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

E8A15

46. What would the waveform of a stream of digital data bits look like on a conventional oscilloscope?

E7A05

47. Which of the following is a circuit that continuously alternates between two states without an external clock?

E0A09

48. Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled?

E6A13

49. What do the initials CMOS stand for?

Figure

E9B01

50. In the antenna radiation pattern shown in Figure E9-1, what is the 3-dB beamwidth?