E7A01
1. Which circuit is bistable?
E3A12
2. What is most likely to result in auroral propagation?
E9A08
3. Which frequency band has the smallest first Fresnel zone?
E2A02
4. Which of the following is characteristic of an inverting linear transponder?
E8B07
5. Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?
E7B02
6. What is a Class D amplifier?
E1F03
7. Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?
E9E07
8. What parameter describes the interaction of a load and transmission line?
E1E07
9. What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?
E7F03
10. What type of digital signal processing filter is used to generate an SSB signal?
E1B02
11. Which of the following is an acceptable bandwidth for digital voice or slow-scan TV transmissions made on the HF amateur bands?
E7D05
12. Which of the following types of linear voltage regulator operates by loading the unregulated voltage source?
E6F11
13. What is the approximate open-circuit voltage produced by a fully illuminated silicon photovoltaic cell?
E5D07
14. What combines to create the self-resonance of a component?
E2E08
15. Which of the following HF digital modes can be used to transfer binary files?
E7G09
16. What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1,000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?
E6D07
17. What is the current that flows in the primary winding of a transformer when there is no load on the secondary winding?
E9D10
18. How does radiation resistance of a base-fed whip antenna change below its resonant frequency?
E2B09
19. What kind of receiver can be used to receive and decode SSTV using the Digital Radio Mondiale (DRM) protocol?
E6E06
20. What characteristics of MMICs make them a popular choice for VHF through microwave circuits?
E1A10
21. If an amateur station is installed aboard a ship or aircraft, what condition must be met before the station is operated?
E7H13
22. Which of the following is a technique for providing highly accurate and stable oscillators needed for microwave transmission and reception?
E5B05
23. What is the effect on the magnitude of pure reactance when it is converted to susceptance?
E2C06
24. During a VHF/UHF contest, in which band segment would you expect to find the highest level of SSB or CW activity?
E9B04
25. What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?
E4B10
26. Which of the following methods measures intermodulation distortion in an SSB transmitter?
E3B07
27. What effect does lowering a signal's transmitted elevation angle have on ionospheric HF skip propagation?
E2D06
28. Which of the following is a method for establishing EME contacts?
E6A02
29. Which of the following semiconductor materials contains excess free electrons?
E0A01
30. What is the primary function of an external earth connection or ground rod?
E9H07
31. What is the function of a Beverage antenna's termination resistor?
E6B08
33. Which of the following is a Schottky barrier diode?
E4E04
34. How can conducted noise from an automobile battery charging system be suppressed?
E4D09
35. What is the purpose of the preselector in a communications receiver?
E8A04
36. What is "dither" with respect to analog-to-digital converters?
E8D11
37. What is one advantage of using ASCII code for data communications?
E4C11
38. Why does input attenuation reduce receiver overload on the lower frequency HF bands with little or no impact on signal-to-noise ratio?
E5C06
39. What does the impedance 50 - j25 ohms represent?
E1D07
40. Which of the following HF amateur bands include allocations for space stations?
E7E11
41. Which type of detector is used for demodulating SSB signals?
E9F03
42. Why is the electrical length of a coaxial cable longer than its physical length?
E9C08
43. What is a folded dipole antenna?
E6C05
44. Which of the following digital logic families has the lowest power consumption?
E5A05
45. What is the result of increasing the Q of an impedance-matching circuit?
E4A03
46. Which of the following test instruments is used to display spurious signals and/or intermodulation distortion products generated by an SSB transmitter?
E7C04
47. How does an impedance-matching circuit transform a complex impedance to a resistive impedance?
E8C10
48. How can data rate be increased without increasing bandwidth?
E3C07
49. Which of the following indicates the greatest solar flare intensity?
E9G09
50. What third family of circles is often added to a Smith chart during the process of designing impedance matching networks?
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