Practice Exam

Element 4: Extra (Expires soon!)

E1F08

1. What is the National Radio Quiet Zone?

E3A05

2. What transmit and receive time sequencing is normally used on 144 MHz when attempting an EME contact?

E7B17

3. Which of the following is a characteristic of a grounded-grid amplifier?

E1A01

4. When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies will result in a normal USB emission being within the band?

E1D11

5. Which amateur stations are eligible to operate as Earth stations?

E4C08

6. How might lowering the noise figure affect receiver performance?

E9H02

7. What is the effective radiated power of a repeater station with 200 watts transmitter power output, 4-dB feed line loss, 3.2-dB duplexer loss, 0.8-dB circulator loss and 10-dBd antenna gain?

E8C06

8. What is the necessary bandwidth of a 13-WPM international Morse code transmission?

E4D08

9. What causes intermodulation in an electronic circuit?

E2A14

10. What happens to a satellite's transmitted signal due to the Doppler Effect?

E2E12

11. Which of these digital communications modes has the narrowest bandwidth?

E9E09

12. Which of these matching systems is an effective method of connecting a 50-ohm coaxial cable feed-line to a grounded tower so it can be used as a vertical antenna?

E8B04

13. 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?

E7A10

14. What logical operation does a NOR gate perform?

E2B17

15. Which of the following is NOT a characteristic of FMTV (Frequency-Modulated Amateur Television) as compared to vestigial sideband AM television?

E9F15

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

E9G03

17. Which of the following is often determined using a Smith chart?

E3C12

18. As the frequency of a signal is increased, how does its ground wave propagation change?

E7F11

19. What is the purpose of a frequency counter?

E0A09

20. 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?

E4E05

21. How can noise from an electric motor be suppressed?

E3B02

22. What is the approximate maximum range for signals using transequatorial propagation?

E7C02

23. A T-network with series capacitors and a parallel (shunt) inductor has which of the following properties?

E6B04

24. What special type of diode is capable of both amplification and oscillation?

E1B10

25. Which amateur stations may be operated in RACES?

E1E20

26. What is the minimum age to be a volunteer examiner?

E7G03

27. What are the advantages of using an op-amp instead of LC elements in an audio filter?

E1C09

28. Which of these frequencies are available for automatically controlled ground-station repeater operation?

E7H07

29. What is a magnetron oscillator?

E5A11

30. What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?

E5C05

31. In polar coordinates, what is the impedance of a network consisting of a 400-ohm- reactance inductor in parallel with a 300-ohm resistor?

E2D04

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

E8A07

33. What determines the PEP-to-average power ratio of a single-sideband phone signal?

E5B12

34. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 75 ohms, R is 100 ohms, and XL is 50 ohms?

E6F02

35. What happens to the conductivity of a photoconductive material when light shines on it?

E6E11

36. How is the operating bias voltage normally supplied to the most common type of monolithic microwave integrated circuit (MMIC)?

E8D18

37. Which of the following is a typical value for the RMS voltage at a common household electrical power outlet?

Figure

E6C09

38. In Figure E6-5, what is the schematic symbol for an OR gate?

Figure

E7D13

39. What is the purpose of D1 in the circuit shown in Figure E7-3?

E5D17

40. What is the power factor of an RL circuit having a 30 degree phase angle between the voltage and the current?

E4A12

41. Which of the following procedures is an important precaution to follow when connecting a spectrum analyzer to a transmitter output?

E2C05

42. Which of the following frequencies would generally be acceptable for U.S. stations to work other U.S. stations in a phone contest?

E6D17

43. What is the principle advantage of liquid-crystal display (LCD) devices over other types of display devices?

E4B08

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

E9C07

45. What is the effect of a terminating resistor on a rhombic antenna?

E7E12

46. Which of the following types of detector is well suited for demodulating SSB signals?

E6A17

47. What are the majority charge carriers in N-type semiconductor material?

E9D10

48. What is the approximate feed-point impedance at the center of a folded dipole antenna?

E9B06

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

E9A13

50. Which is the most important factor that determines ground losses for a ground-mounted vertical antenna operating in the 3-30 MHz range?