Practice Exam

Element 4: Extra

E2C09

1. What type of equipment is commonly used to implement an amateur radio mesh network?

E9G01

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

E8A06

3. What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?

E1E06

4. Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?

E9C14

5. How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?

E2A03

6. How is the signal inverted by an inverting linear transponder?

E4E01

7. What problem can occur when using an automatic notch filter (ANF) to remove interfering carriers while receiving CW signals?

E7E06

8. Why is de-emphasis commonly used in FM communications receivers?

Figure

E9B02

9. In the antenna radiation pattern shown in Figure E9-1, what is the front-to-back ratio?

E2E01

10. Which of the following types of modulation is common for data emissions below 30 MHz?

E1A09

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

E4A09

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

E6D01

13. Why should core saturation of an impedance matching transformer be avoided?

E7C03

14. What advantage does a series-L Pi-L-network have over a series-L Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

E4D05

15. 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?

E5C04

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

E8B07

17. Orthogonal Frequency Division Multiplexing is a technique used for which type of amateur communication?

E3C12

18. How does the maximum range of ground-wave propagation change when the signal frequency is increased?

E4B05

19. What three test loads are used to calibrate an RF vector network analyzer?

E2B04

20. How is color information sent in analog SSTV?

E9H04

21. What is an advantage of placing a grounded electrostatic shield around a small loop direction-finding antenna?

E7B17

22. Why are odd-order rather than even-order intermodulation distortion products of concern in linear power amplifiers?

E9D05

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

E6E08

24. How is power supplied to the most common type of MMIC?

E8D06

25. What is the advantage of including parity bits in ASCII characters?

E1B07

26. To what type of regulations does PRB-1 apply?

E6F06

27. Which of these materials is most commonly used to create photoconductive devices?

E3A12

28. What is the cause of auroral activity?

E8C04

29. What technique minimizes the bandwidth of a PSK31 signal?

E1F02

30. What privileges are authorized in the U.S. to persons holding an amateur service license granted by the government of Canada?

E2D09

31. What type of modulation is used for JT65 contacts?

E5B12

32. What is admittance?

E6A08

33. What term indicates the frequency at which the grounded-base current gain of a transistor has decreased to 0.7 of the gain obtainable at 1 kHz?

E5D09

34. What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?

E6B03

35. What type of bias is required for an LED to emit light?

E9A08

36. What is antenna bandwidth?

E1D02

37. Which of the following may transmit special codes intended to obscure the meaning of messages?

E0A02

38. When evaluating RF exposure levels from your station at a neighbor's home, what must you do?

E5A04

39. What is the magnitude of the impedance of a parallel RLC circuit at resonance?

E9F06

40. 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?

E9E04

41. What is the purpose of the series capacitor in a gamma-type antenna matching network?

E1C04

42. What is meant by IARP?

E7H07

43. How can an oscillator's microphonic responses be reduced?

Figure

E7G09

44. 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?

Figure

E7D06

45. What is the purpose of Q1 in the circuit shown in Figure E7-2?

E7A09

46. What logical operation is performed by an exclusive NOR gate?

E4C03

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

E3B11

48. At what time of day can sporadic E propagation occur?

E7F03

49. What type of digital signal processing filter is used to generate an SSB signal?

E6C01

50. What is the function of hysteresis in a comparator?