Practice Exam

Element 4: Extra

E2E12

1. Which type of digital communication does not support keyboard-to-keyboard operation?

E7E03

2. How does an analog phase modulator function?

E8B01

3. What is the term for the ratio between the frequency deviation of an RF carrier wave, and the modulating frequency of its corresponding FM-phone signal?

E6C03

4. Which of the following describes tri-state logic?

E3B05

5. Which amateur bands typically support long-path propagation?

E4B07

6. Which of the following is good practice when using an oscilloscope probe?

E2A11

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

E1D04

8. What is an Earth station in the amateur satellite service?

E9D11

9. What is the function of a loading coil as used with an HF mobile antenna?

E1E14

10. For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed?

E7B07

11. Which of the following is a likely result when a Class C amplifier is used to amplify a single-sideband phone signal?

Figure

E7D13

12. What is the purpose of D1 in the circuit shown in Figure E7-3?

E9G01

13. Which of the following can be calculated using a Smith chart?

E7H04

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

E0A10

15. What material found in some electronic components such as high-voltage capacitors and transformers is considered toxic?

E2D08

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

E6D16

17. What is one reason for using ferrite toroids rather than powdered-iron toroids in an inductor?

E8A13

18. What is an advantage of using digital signals instead of analog signals to convey the same information?

E5B07

19. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 500 ohms, R is 1 kilohm, and XL is 250 ohms?

E1A02

20. 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?

E9H04

21. What term describes station output, including the transmitter, antenna and everything in between, when considering transmitter power and system gains and losses?

E6F09

22. What is the efficiency of a photovoltaic cell?

E4C10

23. Which of the following is a desirable amount of selectivity for an amateur RTTY HF receiver?

E9F06

24. What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically one-half wavelength long at 14.10 MHz?

E7C11

25. Which of the following is the common name for a filter network which is equivalent to two L networks connected back-to-back with the inductors in series and the capacitors in shunt at the input and output?

E9C01

26. What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?

E7A10

27. What is a truth table?

E5A05

28. What is the magnitude of the current at the input of a series RLC circuit as the frequency goes through resonance?

E9B14

29. What type of information can be obtained by submitting the details of a proposed new antenna to a modeling program?

E8D15

30. Which of the following is a typical value for the RMS voltage at a standard U.S. household electrical power outlet?

E4A08

31. Which of the following instruments would be best for measuring the SWR of a beam antenna?

E5D17

32. How many watts are consumed in a circuit having a power factor of 0.6 if the input is 200V AC at 5 amperes?

E7G05

33. How can unwanted ringing and audio instability be prevented in a multi-section op-amp RC audio filter circuit?

E3A02

34. What characterizes libration fading of an Earth-Moon-Earth signal?

E4D01

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

E1F06

36. What is the National Radio Quiet Zone?

E6E09

37. Which of the following must be done to insure that a crystal oscillator provides the frequency specified by the crystal manufacturer?

E4E05

38. How can noise from an electric motor be suppressed?

E9A06

39. What is included in the total resistance of an antenna system?

E6A06

40. What is the beta of a bipolar junction transistor?

E7F02

41. Which of the following would be used to reduce a signal's frequency by a factor of ten?

E2C07

42. What is the Cabrillo format?

E3C06

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

E1B09

44. Which amateur stations may be operated in RACES?

E8C04

45. What technique is used to minimize the bandwidth requirements of a PSK31 signal?

E9E10

46. Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?

E5C05

47. In polar coordinates, what is the impedance of a network consisting of a 400-ohm-reactance inductor in parallel with a 300-ohm resistor?

E2B18

48. On which of the following frequencies is one likely to find FM ATV transmissions?

E1C07

49. What is meant by local control?

E6B03

50. What special type of diode is capable of both amplification and oscillation?