Practice Exam

Element 4: Extra

E1C01

1. What is the maximum bandwidth for a data emission on 60 meters?

E9C08

2. What is a folded dipole antenna?

E1B10

3. What frequencies are authorized to an amateur station operating under RACES rules?

E9F06

4. What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically 1/2 wavelength long at 14.10 MHz?

E9D08

5. What happens as the Q of an antenna increases?

E6E11

6. What is a characteristic of DIP packaging used for integrated circuits?

E3C08

7. What does the space weather term "G5" mean?

E7E11

8. Which type of detector circuit is used for demodulating SSB signals?

E5D15

9. What is the power factor of an RL circuit having a 45-degree phase angle between the voltage and the current?

E4C03

10. What is the term for the suppression in an FM receiver of one signal by another stronger signal on the same frequency?

E6D10

11. What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?

E9B11

12. What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?

E0A07

13. How may dangerous levels of carbon monoxide from an emergency generator be detected?

E2C11

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

E7B03

15. Which of the following components form the output of a class D amplifier circuit?

E9A07

16. What is the effective isotropic radiated power of a repeater station with 200 watts transmitter power output, 2 dB feed line loss, 2.8 dB duplexer loss, 1.2 dB circulator loss, and 7 dBi antenna gain?

E4E05

17. How can radio frequency interference from an AC motor be suppressed?

E5A02

18. What is resonance in an LC or RLC circuit?

E2B11

19. What is the function of the Vertical Interval Signaling (VIS) code sent as part of an SSTV transmission?

E8D08

20. What parameter evaluates distortion of an AFSK signal caused by excessive input audio levels?

Figure

E7G09

21. What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?

E3A13

22. Which of these emission modes is best for auroral propagation?

E9E03

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

E7D11

24. What is the function of the pass transistor in a linear voltage regulator circuit?

E1F01

25. On what frequencies are spread spectrum transmissions permitted?

E4A10

26. Which of the following displays multiple digital signal states simultaneously?

E6B06

27. Which of the following is a common use of a Schottky diode?

E6F01

28. What absorbs the energy from light falling on a photovoltaic cell?

E4B07

29. What do the subscripts of S parameters represent?

E5B06

30. What is susceptance?

E7H02

31. What is a microphonic?

E2A12

32. What is the purpose of digital store-and-forward functions on an amateur radio satellite?

E6C04

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

E7C07

34. Which describes a Pi-L-network used for matching a vacuum tube final amplifier to a 50-ohm unbalanced output?

E8C09

35. Which digital code allows only one bit to change between sequential code values?

E5C04

36. What coordinate system is often used to display the resistive, inductive, and/or capacitive reactance components of impedance?

E6A12

37. Why do many MOSFET devices have internally connected Zener diodes on the gates?

E8A05

38. What of the following instruments would be the most accurate for measuring the RMS voltage of a complex waveform?

E8B04

39. What is the modulation index of an FM-phone signal having a maximum carrier deviation of plus or minus 6 kHz when modulated with a 2 kHz modulating frequency?

E2E04

40. What is indicated when one of the ellipses in an FSK crossed-ellipse display suddenly disappears?

E9G04

41. What are the two families of circles and arcs that make up a Smith chart?

E1A09

42. What action or actions should you take if your digital message forwarding station inadvertently forwards a communication that violates FCC rules?

E7A11

43. What type of logic defines "1" as a high voltage?

E4D05

44. What transmitter frequencies would cause an intermodulation-product signal in a receiver tuned to 146.70 MHz when a nearby station transmits on 146.52 MHz?

E1D10

45. Which amateur stations are eligible to be telecommand stations of space stations (subject to the privileges of the class of operator license held by the control operator of the station)?

E7F05

46. How frequently must an analog signal be sampled by an analog-to-digital converter so that the signal can be accurately reproduced?

E3B09

47. At what time of year is sporadic E propagation most likely to occur?

E2D02

48. Which of the following is a good technique for making meteor scatter contacts?

E9H11

49. What feature of a cardioid pattern antenna makes it useful for direction finding?

E1E07

50. What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?