Practice Exam

Element 3: General

G5C07

1. What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?

G4C01

2. Which of the following might be useful in reducing RF interference to audio frequency devices?

G8C13

3. What is indicated on a waterfall display by one or more vertical lines on either side of a digital signal?

G2A06

4. Which of the following is an advantage when using single sideband, as compared to other analog voice modes on the HF amateur bands?

G9A06

5. In what units is RF feed line loss usually expressed?

G5B11

6. What is the ratio of peak envelope power to average power for an unmodulated carrier?

G2D08

7. What is a reason why many amateurs keep a station log?

G8B08

8. Why is it important to know the duty cycle of the mode you are using when transmitting?

G1E03

9. What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

G2E13

10. Which communication system sometimes uses the internet to transfer messages?

G7C07

11. What is the simplest combination of stages that implement a superheterodyne receiver?

G4E04

12. Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

G6B06

13. What kind of device is an integrated circuit operational amplifier?

G7B04

14. Which of the following describes the function of a two input NOR gate?

G0A08

15. Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations when transmitter power exceeds levels specified in FCC Part 97.13?

G3A08

16. Which of the following effects can a geomagnetic storm have on radio propagation?

G3B07

17. What does LUF stand for?

G9B02

18. Which of the following is a common way to adjust the feed-point impedance of a quarter wave ground-plane vertical antenna to be approximately 50 ohms?

G7A06

19. What portion of the AC cycle is converted to DC by a full-wave rectifier?

G9C09

20. How does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

G2C02

21. What should you do if a CW station sends "QRS"?

G1A15

22. What portion of the 10-meter band is available for repeater use?

G9D03

23. In which direction is the maximum radiation from a portable VHF/UHF "halo" antenna?

G8A09

24. What type of modulation is used by the FT8 digital mode?

G3C07

25. What makes HF scatter signals often sound distorted?

G1C07

26. What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

G0B08

27. What should be done by any person preparing to climb a tower that supports electrically powered devices?

G4D02

28. Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

G4A01

29. What is the purpose of the "notch filter" found on many HF transceivers?

G1B12

30. When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

G2B08

31. What is the voluntary band plan restriction for U.S. stations transmitting within the 48 contiguous states in the 50.1 to 50.125 MHz band segment?

G1D07

32. Volunteer Examiners are accredited by what organization?

G5A05

33. How does an inductor react to AC?

G4B04

34. What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

G6A12

35. What is the primary purpose of a screen grid in a vacuum tube?