Practice Exam

G4D04

1. What does an S meter measure?

• A. Transmitter power output
• B. Received signal strength
• C. Impedance
• D. Carrier suppression

G9D05

2. What is an advantage of vertically stacking horizontally polarized Yagi antennas?

• A. It allows quick selection of vertical or horizontal polarization
• B. It narrows the main lobe in azimuth
• C. It narrows the main lobe in elevation
• D. It allows simultaneous vertical and horizontal polarization

G7B09

3. What determines the frequency of an LC oscillator?

• A. The time delay of the lag circuit
• B. The inductance and capacitance in the tank circuit
• C. The number of stages in the counter
• D. The number of stages in the divider

G3A05

4. What is the solar flux index?

• A. Another name for the American sunspot number
• B. A count of sunspots that is adjusted for solar emissions
• C. A measure of solar radiation with a wavelength of 10.7 centimeters
• D. A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth

G5B08

5. What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

• A. 84.8 volts
• B. 169.7 volts
• C. 339.4 volts
• D. 240.0 volts

G8B13

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

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

G1E07

7. In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

• A. No part
• B. Channels 1 through 4
• C. Anywhere in the band
• D. Channels 42 through 45

G4B10

8. Which of the following can be determined with a directional wattmeter?

• A. Standing wave ratio
• B. Antenna front-to-back ratio
• C. RF interference
• D. Radio wave propagation

G9B07

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

G2D03

10. What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

• A. Compare vertical and horizontal signal strengths on the input frequency
• B. Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
• C. Compare signal strengths between the input and output of the repeater
• D. All these choices are correct

G9A04

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

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

G2C09

12. What does the Q signal "QSL" mean?

• A. Send slower
• B. We have worked before
• C. I have received and understood
• D. We have already confirmed the contact

G7C02

13. What output is produced by a balanced modulator?

• A. Double-sideband modulated RF
• B. Frequency modulated RF
• C. Audio extracted from the modulation signal
• D. Audio with equalized frequency response

G0A08

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

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

G8C13

15. What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

• A. Overmodulation
• B. Backscatter propagation
• C. Long path propagation
• D. Insufficient modulation

G2A04

16. Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

G3B07

17. What does LUF stand for?

• A. The Lowest Usable Frequency for communications between two specific points
• B. The Lowest Usable Frequency during a 24-hour period
• C. Lowest Usable Frequency during the past 60 minutes
• D. Lowest Usable Frequency for communications to any point outside a 100-mile radius

G1B08

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

• A. When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
• B. Only when the foreign country has a formal third-party agreement filed with the FCC
• C. Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country
• D. Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country

G1C07

19. What must be done before using a new digital protocol on the air?

• A. Submit a rule-making proposal to the FCC describing the codes and methods of the technique
• B. Type-certify equipment to FCC standards
• C. Obtain an experimental license from the FCC
• D. Publicly document the technical characteristics of the protocol

G0B08

20. What should be done before climbing a tower that supports electrically powered devices?

• A. All these choices are correct
• B. Make sure all circuits that supply power to the tower are locked out and tagged
• C. Notify the electric company that a person will be working on the tower
• D. Unground the base of the tower

G6A01

21. What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

• A. 10.5 volts
• B. 6 volts
• C. 12 volts
• D. 8.5 volts

G1A11

22. When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

• A. The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz
• B. The upper frequency portion
• C. The lower frequency portion
• D. The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz

G6B02

23. What is meant by the term MMIC?

• A. Monolithic Microwave Integrated Circuit
• B. Mode Modulated Integrated Circuit
• C. Multi-Mode Integrated Circuit
• D. Metal Monolayer Integrated Circuit

G5C05

24. Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

• A. To improve the coupling between the primary and secondary
• B. To prevent parasitic oscillations due to resistive losses in the primary
• C. To accommodate the higher current of the primary
• D. To ensure that the volume of the primary winding is equal to the volume of the secondary winding

G5A12

25. What occurs in an LC circuit at resonance?

• A. Resistance is cancelled
• B. Inductive reactance and capacitive reactance cancel
• C. Current and voltage are equal
• D. The circuit radiates all its energy in the form of radio waves

G9C02

26. What is the approximate length of the driven element of a Yagi antenna?

• A. 1 wavelength
• B. 3/4 wavelength
• C. 1/4 wavelength
• D. 1/2 wavelength

G7A12

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

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

G3C07

28. What makes HF scatter signals often sound distorted?

• A. Energy is scattered into the skip zone through several different paths
• B. Ground waves are absorbing much of the signal
• C. The ionospheric region involved is unstable
• D. The E region is not present

G2E12

29. Which of the following describes Winlink?

• A. An amateur radio wireless network to send and receive email on the internet
• B. A wireless network capable of both VHF and HF band operation
• C. All of the above
• D. A form of Packet Radio

G4C08

30. Which of the following would reduce RF interference caused by common-mode current on an audio cable?

• A. Add an additional insulating jacket to the cable
• B. Place a ferrite choke on the cable
• C. Ground the center conductor of the audio cable causing the interference
• D. Connect the center conductor to the shield of all cables to short circuit the RFI signal

G1D05

31. When operating a US station by remote control from outside the country, what license is required of the control operator?

• A. A US operator/primary station license
• B. Only an appropriate US operator/primary license and a special remote station permit from the FCC
• C. A license from the foreign country and a special remote station permit from the FCC
• D. Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US

G2B11

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

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

G8A07

33. Which of the following phone emissions uses the narrowest bandwidth?

• A. Vestigial sideband
• B. Single sideband
• C. Frequency modulation
• D. Phase modulation

G4E05

34. Which of the following most limits an HF mobile installation?

• A. "Picket fencing"
• B. The wire gauge of the DC power line to the transceiver
• C. Efficiency of the electrically short antenna
• D. FCC rules limiting mobile output power on the 75-meter band

G4A10

35. What is the function of an electronic keyer?

• A. Computer interface for PSK and RTTY operation
• B. Automatic generation of dots and dashes for CW operation
• C. Automatic transmit/receive switching
• D. To allow time for switching the antenna from the receiver to the transmitter