Practice Exam

Element 4: Extra

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

E7C13

1. What is one advantage of a Pi-matching network over an L-matching network consisting of a single inductor and a single capacitor?

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

E7D12

2. What is the drop-out voltage of an analog voltage regulator?

E1D05

3. What class of licensee is authorized to be the control operator of a space station?

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

E7A05

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

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

E2C13

5. What indicator is required to be used by U.S.-licensed operators when operating a station via remote control where the transmitter is located in the U.S.?

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

E6A06

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

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

E4A09

7. When using a computer's soundcard input to digitize signals, what is the highest frequency signal that can be digitized without aliasing?

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

E9H01

8. When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?

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

E2A03

9. What is the orbital period of an Earth satellite?

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

E3C09

10. How does the intensity of an X3 flare compare to that of an X2 flare?

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

E5B10

11. What is the relationship between the current through an inductor and the voltage across an inductor?

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

E8D06

12. Which of the following indicates likely overmodulation of an AFSK signal such as PSK or MFSK?

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

E3A11

13. What is a typical range for tropospheric propagation of microwave signals?

E1A06

14. Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?

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

E5C01

15. Which of the following represents a capacitive reactance in rectangular notation?

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

E6F04

16. What is the photovoltaic effect?

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

E7B10

17. In Figure E7-1, what is the purpose of R1 and R2?

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

E9A12

18. How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 6 dB gain over an isotropic antenna?

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

E4B03

19. If a frequency counter with a specified accuracy of +/- 1.0 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

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

E5D08

20. What type of energy is stored in an electromagnetic or electrostatic field?

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

E2E08

21. Which of the following HF digital modes can be used to transfer binary files?

E1C03

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

E1B11

23. What is the permitted mean power of any spurious emission relative to the mean power of the fundamental emission from a station transmitter or external RF amplifier installed after January 1, 2003 and transmitting on a frequency below 30 MHZ?

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

E5A16

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

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

E4E10

25. What is a common characteristic of interference caused by a touch controlled electrical device?

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

E7H11

26. What are the major spectral impurity components of direct digital synthesizers?

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

E6B07

27. What is the failure mechanism when a junction diode fails due to excessive current?

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

E6D16

28. What is the common name for a capacitor connected across a transformer secondary that is used to absorb transient voltage spikes?

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

E2D03

29. Which of the following digital modes is especially useful for EME communications?

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

E7F09

30. Why is an anti-aliasing digital filter required in a digital decimator?

E1E08

31. To which of the following examinees may a VE not administer an examination?

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

E4C11

32. Which of the following is a desirable amount of selectivity for an amateur SSB phone receiver?

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

E8A02

33. What type of wave has a rise time significantly faster than its fall time (or vice versa)?

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

E9D06

34. What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?

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

E6E04

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

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

E7E08

36. What are the principal frequencies that appear at the output of a mixer circuit?

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

E9E02

37. What is the name of an antenna matching system that matches an unbalanced feed line to an antenna by feeding the driven element both at the center of the element and at a fraction of a wavelength to one side of center?

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

E9C05

38. What is an OCFD antenna?

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

E6C01

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

E1F01

40. On what frequencies are spread spectrum transmissions permitted?

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

E9G10

41. What do the arcs on a Smith chart represent?

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

E8C04

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

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

E4D10

43. What does a third-order intercept level of 40 dBm mean with respect to receiver performance?

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

E3B13

44. Why is chordal hop propagation desirable?

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

E9F15

45. What impedance does a 1/2 wavelength transmission line present to a generator when the line is open at the far end?

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

E9B16

46. How many elevation lobes appear in the forward direction of the antenna radiation pattern shown in Figure E9-2?

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

E0A08

47. What does SAR measure?

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

E2B14

48. What aspect of an amateur slow-scan television signal encodes the brightness of the picture?

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

E8B10

49. What describes frequency division multiplexing?

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

E7G08

50. How does the gain of an ideal operational amplifier vary with frequency?