Practice Exam

Element 4: Extra

Study material for this question can be found in the following resources:

E7C10

1. Which of the following filters would be the best choice for use in a 2 meter repeater duplexer?

Study material for this question can be found in the following resources:

E8C11

2. What is the relationship between symbol rate and baud?

Study material for this question can be found in the following resources:

E7B02

3. What is a Class D amplifier?

Study material for this question can be found in the following resources:

E9A15

4. 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?

Study material for this question can be found in the following resources:

E4E02

5. Which of the following types of receiver noise can often be reduced with a DSP noise filter?

Study material for this question can be found in the following resources:

E9H05

6. What is the main drawback of a wire-loop antenna for direction finding?

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E9F08

7. What is the term for the ratio of the actual speed at which a signal travels through a transmission line to the speed of light in a vacuum?

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E9E08

8. Which of the following measurements is characteristic of a mismatched transmission line?

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E8D05

9. What is the most common method of reducing key clicks?

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E0A09

10. 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?

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E5C09

11. When using rectangular coordinates to graph the impedance of a circuit, what does the horizontal axis represent?

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E4A01

12. Which of the following parameter determines the bandwidth of a digital or computer-based oscilloscope?

E1A04

13. With your transceiver displaying the carrier frequency of phone signals, you hear a DX station calling CQ on 3.601 MHz LSB. Is it legal to return the call using lower sideband on the same frequency?

Study material for this question can be found in the following resources:

E5A16

14. What is the resonant frequency of a parallel RLC circuit if R is 33 ohms, L is 50 microhenrys and C is 10 picofarads?

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E4D11

15. Why are third-order intermodulation products created within a receiver of particular interest compared to other products?

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E3C01

16. What does the term ray tracing describe in regard to radio communications?

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Figure

E7D08

17. What type of circuit is shown in Figure E7-3?

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E7E02

18. What is the function of a reactance modulator?

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E5D07

19. What determines the strength of the magnetic field around a conductor?

E1B05

20. What is the National Radio Quiet Zone?

E1F06

21. Under what circumstances might the FCC issue a Special Temporary Authority (STA) to an amateur station?

E1E05

22. What is the minimum passing score on amateur operator license examinations?

Study material for this question can be found in the following resources:

E3B14

23. What happens to linearly polarized radio waves that split into ordinary and extraordinary waves in the ionosphere?

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E2D08

24. What type of packet frame is used to transmit APRS beacon data?

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E6D04

25. Which materials are commonly used as a slug core in a variable inductor?

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E4B04

26. If a frequency counter with a specified accuracy of +/- 0.1 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

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E9D01

27. How does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?

E1D06

28. Which of the following is a requirement of a space station?

Study material for this question can be found in the following resources:

E7F11

29. What sets the minimum detectable signal level for an SDR in the absence of atmospheric or thermal noise?

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E9B04

30. What may occur when a directional antenna is operated at different frequencies within the band for which it was designed?

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E2B03

31. How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?

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E7A05

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

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E5B07

33. 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?

Study material for this question can be found in the following resources:

E6C14

34. What is the primary advantage of using a Programmable Gate Array (PGA) in a logic circuit?

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E4C04

35. How is the noise figure of a receiver defined?

Study material for this question can be found in the following resources:

E6E04

36. Which is the most common input and output impedance of circuits that use MMICs?

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E9C13

37. What is the main effect of placing a vertical antenna over an imperfect ground?

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E7G03

38. What is the typical input impedance of an integrated circuit op-amp?

Study material for this question can be found in the following resources:

E7H13

39. Which of the following is a technique for providing highly accurate and stable oscillators needed for microwave transmission and reception?

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E6B06

40. Which of the following is a common use of a hot-carrier diode?

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E8B03

41. What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency when the modulating frequency is 1000 Hz?

Study material for this question can be found in the following resources:

E9G02

42. What type of coordinate system is used in a Smith chart?

Study material for this question can be found in the following resources:

E2E02

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

Study material for this question can be found in the following resources:

E2A01

44. What is the direction of an ascending pass for an amateur satellite?

Study material for this question can be found in the following resources:

E8A13

45. Which of these methods is commonly used to convert analog signals to digital signals?

E1C03

46. How do the control operator responsibilities of a station under automatic control differ from one under local control?

Study material for this question can be found in the following resources:

E2C03

47. From which of the following bands is amateur radio contesting generally excluded?

Study material for this question can be found in the following resources:

E3A01

48. What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by Moon bounce?

Study material for this question can be found in the following resources:

E6F14

49. Which of the following is true of LCD displays?

Study material for this question can be found in the following resources:

E6A03

50. Why does a PN-junction diode not conduct current when reverse biased?