Practice Exam

G3B12

1. Which of the following is typical of the lower HF frequencies during the summer?

• A. Heavy distortion on signals due to photon absorption
• B. World-wide propagation during daylight hours
• C. High levels of atmospheric noise or static
• D. Poor propagation at any time of day

G7C09

2. What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

• A. 180 degrees
• B. 90 degrees
• C. 45 degrees
• D. Zero

G1E04

3. Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

• A. All these choices are correct
• B. When using a band where the Amateur Service is secondary
• C. When operating within one mile of an FCC Monitoring Station
• D. When a station is transmitting spread spectrum emissions

G5C02

4. What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

• A. Additional resistance must be added in series with the primary to prevent overload
• B. Additional resistance must be added in parallel with the secondary to prevent overload
• C. The input voltage is divided by 4
• D. The input voltage is multiplied by 4

G2E15

5. Which of the following is a common location for FT8?

• A. Anywhere in the voice portion of the band
• B. Approximately 14.074 MHz to 14.077 MHz
• C. Approximately 14.110 MHz to 14.113 MHz
• D. Anywhere in the CW portion of the band

G0A08

6. Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

• A. Post a copy of FCC Part 97.13 in the station
• B. All these choices are correct
• C. Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas
• D. Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels

G5B12

7. What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

• A. 173 volts
• B. 245 volts
• C. 692 volts
• D. 346 volts

G2D04

8. Which of the following describes an azimuthal projection map?

• A. A map that shows true bearings and distances from a specific location
• B. A map that shows the angle at which an amateur satellite crosses the equator
• C. A map that shows accurate land masses
• D. A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit

G9D12

9. What is the common name of a dipole with a single central support?

• A. Lazy H
• B. Sloper
• C. Inverted V
• D. Inverted L

G9B07

10. How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

• A. It steadily decreases
• B. It peaks at about 1/8 wavelength above ground
• C. It steadily increases
• D. It is unaffected by the height above ground

G6A10

11. Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

• A. Screen grid
• B. Suppressor grid
• C. Trigger electrode
• D. Control grid

G7A12

12. Which symbol in Figure G7-1 represents a solid core transformer?

• A. Symbol 6
• B. Symbol 4
• C. Symbol 7
• D. Symbol 1

G1D10

13. What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

• A. 18 years
• B. 16 years
• C. There is no age limit
• D. 21 years

G4A07

14. What happens as a receiver's noise reduction control level is increased?

• A. Received signals may become distorted
• B. CW signals may become severely attenuated
• C. Received frequency may shift several kHz
• D. Received frequency may become unstable

G8C14

15. Which of the following describes a waterfall display?

• A. Frequency is horizontal, signal strength is vertical, time is intensity
• B. Frequency is horizontal, signal strength is intensity, time is vertical
• C. Frequency is vertical, signal strength is intensity, time is horizontal
• D. Frequency is vertical, signal strength is horizontal, time is intensity

G4D08

16. What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

• A. 7.1765 MHz to 7.1795 MHz
• B. 7.178 MHz to 7.181 MHz
• C. 7.175 MHz to 7.178 MHz
• D. 7.178 MHz to 7.184 MHz

G8A03

17. What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

• A. Frequency convolution
• B. Frequency modulation
• C. Frequency transformation
• D. Frequency conversion

G4B12

18. What effect can strong signals from nearby transmitters have on an antenna analyzer?

• A. All these choices are correct
• B. Desensitization which can cause intermodulation products which interfere with impedance readings
• C. Generation of harmonics which interfere with frequency readings
• D. Received power that interferes with SWR readings

G4C03

19. What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

• A. A steady hum whenever the transmitter is on the air
• B. On-and-off humming or clicking
• C. Distorted speech
• D. Clearly audible speech

G2C11

20. What does the Q signal "QRV" mean?

• A. I am ready to receive
• B. There is interference on the frequency
• C. You are sending too fast
• D. I am quitting for the day

G1B03

21. Which of the following is a purpose of a beacon station as identified in the FCC rules?

• A. Observation of propagation and reception
• B. Transmission of bulletins of general interest to amateur radio licensees
• C. Automatic identification of repeaters
• D. All these choices are correct

G4E02

22. What is the purpose of a corona ball on an HF mobile antenna?

• A. To reduce the chance of damage if the antenna should strike an object
• B. To narrow the operating bandwidth of the antenna
• C. To reduce RF voltage discharge from the tip of the antenna while transmitting
• D. To increase the "Q" of the antenna

G6B01

23. What determines the performance of a ferrite core at different frequencies?

• A. The ratio of outer diameter to inner diameter
• B. Its thickness
• C. Its conductivity
• D. The composition, or "mix," of materials used

G0B02

24. According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

• A. AWG number 20
• B. AWG number 16
• C. AWG number 8
• D. AWG number 12

G1A08

25. Which HF bands have segments exclusively allocated to Amateur Extra licensees?

• A. All HF bands
• B. 60 meters, 30 meters, 17 meters, and 12 meters
• C. 80 meters, 40 meters, 20 meters, and 15 meters
• D. All HF bands except 160 meters and 10 meters

G7B02

26. Which of these classes of amplifiers has the highest efficiency?

• A. Class B
• B. Class AB
• C. Class C
• D. Class A

G1C11

27. What measurement is specified by FCC rules that regulate maximum power?

• A. RMS output from the transmitter
• B. PEP input to the antenna
• C. RMS input to the antenna
• D. PEP output from the transmitter

G3A12

28. What does the K-index measure?

• A. The short-term stability of Earth's geomagnetic field
• B. The solar radio flux at Boulder, Colorado
• C. The short-term stability of the Sun's magnetic field
• D. The relative position of sunspots on the surface of the Sun

G9A04

29. What causes reflected power at an antenna's feed point?

• A. Operating an antenna at its resonant frequency
• B. Using more transmitter power than the antenna can handle
• C. A difference between feed line impedance and antenna feed point impedance
• D. Feeding the antenna with unbalanced feed line

G8B13

30. Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

• A. All these choices are correct
• B. 5F1-3F2
• C. 2F1-F2
• D. 3F1-F2

G2A03

31. Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

• A. Suppressed sideband
• B. Lower sideband
• C. Upper sideband
• D. Double sideband

G3C06

32. What is a characteristic of HF scatter?

• A. There are very large, sudden swings in signal strength
• B. Scatter propagation occurs only at night
• C. Signals have a fluttering sound
• D. Phone signals have high intelligibility

G2B11

33. How often may RACES training drills and tests be routinely conducted without special authorization?

• A. No more than 1 hour per week
• B. No more than 1 hour per month
• C. No more than 2 hours per month
• D. No more than 2 hours per week

G5A05

34. How does an inductor react to AC?

• A. As the frequency of the applied AC increases, the reactance decreases
• B. As the amplitude of the applied AC increases, the reactance decreases
• C. As the frequency of the applied AC increases, the reactance increases
• D. As the amplitude of the applied AC increases, the reactance increases

G9C05

35. What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

• A. Gain increases
• B. Beamwidth increases
• C. Resonant frequency is lower
• D. Front-to-back ratio decreases