Practice Exam

G4E10

1. What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?

• A. The diode limits the current flowing from the panel to a safe value
• B. The diode prevents self-discharge of the battery through the panel during times of low or no illumination
• C. The diode serves to regulate the charging voltage to prevent overcharge
• D. The diode greatly increases the efficiency during times of high illumination

G3A08

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

• A. Degraded ground wave propagation
• B. Improved high-latitude HF propagation
• C. Improved ground wave propagation
• D. Degraded high-latitude HF propagation

G1B05

3. Which of the following one-way transmissions are permitted?

• A. All these choices are correct
• B. Unidentified test transmissions of less than one minute in duration
• C. Transmissions necessary to assist learning the International Morse code
• D. Regular transmissions offering equipment for sale, if intended for Amateur Radio use

G9B01

4. What is one disadvantage of a directly fed random-wire HF antenna?

• A. You may experience RF burns when touching metal objects in your station
• B. It produces only vertically polarized radiation
• C. It is more effective on the lower HF bands than on the higher bands
• D. It must be longer than 1 wavelength

G6A01

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

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

G8A09

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

• A. Vestigial sideband
• B. 8-tone frequency shift keying
• C. Amplitude compressed AM
• D. Direct sequence spread spectrum

G4D09

7. What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

• A. 14.3455 to 14.3485 MHz
• B. 14.344 to 14.347 MHz
• C. 14.347 to 14.350 MHz
• D. 14.347 to 14.647 MHz

G2C08

8. What prosign is sent to indicate the end of a formal message when using CW?

• A. SK
• B. KN
• C. AR
• D. BK

G8C13

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

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

G3C07

10. What makes HF scatter signals often sound distorted?

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

G9C02

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

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

G4C09

12. How can a ground loop be avoided?

• A. Connect all ground conductors in series
• B. Connect the AC neutral conductor to the ground wire
• C. Avoid using lock washers and star washers when making ground connections
• D. Connect all ground conductors to a single point

G1D09

13. How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

• A. 365 days
• B. 180 days
• C. For as long as your current license is valid
• D. 30 days

G2B04

14. When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

• A. 1 to 3 kHz
• B. 3 to 6 kHz
• C. 150 to 500 Hz
• D. 5 to 50 Hz

G9D04

15. What is the primary purpose of antenna traps?

• A. To provide balanced feed-point impedance
• B. To permit multiband operation
• C. To prevent out-of-band operation
• D. To notch spurious frequencies

G4A09

16. Why is a time delay sometimes included in a transmitter keying circuit?

• A. To prevent stations from interfering with one another
• B. To allow time for a warning signal to be sent to other stations
• C. To allow time for transmit-receive changeover operations to complete properly before RF output is allowed
• D. To allow the transmitter power regulators to charge properly

G5B04

17. How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?

• A. 60 watts
• B. 24 watts
• C. 2.4 watts
• D. 6 watts

G1E01

18. Which of the following would disqualify a third party from participating in stating a message over an amateur station?

• A. The third party is a licensed amateur
• B. The third party's amateur license has been revoked and not reinstated
• C. The third party is speaking in a language other than English
• D. The third party is not a U.S. citizen

G7A07

19. What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

• A. A series of DC pulses at the same frequency as the AC input
• B. A series of DC pulses at twice the frequency of the AC input
• C. A steady DC voltage
• D. A sine wave at half the frequency of the AC input

G3B04

20. What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

• A. Listen for signals from an international beacon in the frequency range you plan to use
• B. Check the strength of signals in the MF AM broadcast band
• C. Send a series of dots on the band and listen for echoes from your signal
• D. Check the strength of TV signals from western Europe

G5C03

21. Which of the following components increases the total resistance of a resistor?

• A. A parallel resistor
• B. A series capacitor
• C. A parallel capacitor
• D. A series resistor

G2E08

22. In what segment of the 20-meter band are most PSK31 operations commonly found?

• A. Below the RTTY segment, near 14.070 MHz
• B. At the bottom of the slow-scan TV segment, near 14.230 MHz
• C. At the top of the SSB phone segment, near 14.325 MHz
• D. In the middle of the CW segment, near 14.100 MHz

G9A02

23. What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

• A. 25 and 30 ohms
• B. 500 and 750 ohms
• C. 50 and 75 ohms
• D. 80 and 100 ohms

G8B12

24. What process combines two signals in a non-linear circuit or connection to produce unwanted spurious outputs?

• A. Detection
• B. Intermodulation
• C. Heterodyning
• D. Rolloff

G7B05

25. How many states does a 3-bit binary counter have?

• A. 8
• B. 16
• C. 3
• D. 6

G2D04

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

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

G6B04

27. What is meant by the term ROM?

• A. Resistant to Overload Memory
• B. Random Operational Memory
• C. Read Only Memory
• D. Resistor Operated Memory

G7C14

28. The bandwidth of a band-pass filter is measured between what two frequencies?

• A. Cutoff and rolloff
• B. Upper and lower half-power
• C. Pole and zero
• D. Image and harmonic

G0A03

29. How can you determine that your station complies with FCC RF exposure regulations?

• A. All these choices are correct
• B. By calculation based on FCC OET Bulletin 65
• C. By measurement of field strength using calibrated equipment
• D. By calculation based on computer modeling

G1A15

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

• A. The portion above 29.5 MHz
• B. The portion between 28.3 MHz and 28.5 MHz
• C. The entire band
• D. The portion between 28.1 MHz and 28.2 MHz

G0B04

31. Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

• A. Lack of nitrogen for adequate combustion
• B. Lack of oxygen for adequate combustion
• C. Danger of engine over torque
• D. Danger of carbon monoxide poisoning

G2A02

32. Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

G4B12

33. What problem can occur when making measurements on an antenna system with an antenna analyzer?

• A. Strong signals from nearby transmitters can affect the accuracy of measurements
• B. The analyzer can be damaged if measurements outside the ham bands are attempted
• C. Connecting the analyzer to an antenna can cause it to absorb harmonics
• D. Permanent damage to the analyzer may occur if it is operated into a high SWR

G5A08

34. What is one reason to use an impedance matching transformer?

• A. To minimize radiation resistance
• B. To reduce power supply ripple
• C. To maximize the transfer of power
• D. To minimize transmitter power output

G1C11

35. What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

• A. 1200 baud
• B. 56 kilobaud
• C. 19.6 kilobaud
• D. 300 baud