US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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1. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	High duty cycle transmitters are exempt from RF exposure requirements
B	A lower duty cycle permits greater power levels to be transmitted
C	A higher duty cycle permits greater power levels to be transmitted
D	Low duty cycle transmitters are exempt from RF exposure evaluation requirements

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	25 amperes
B	15 amperes
C	30 amperes
D	20 amperes

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	28.000 MHz to 28.025 MHz
B	7.125 MHz to 7.175 MHz
C	All these choices are correct
D	21.275 MHz to 21.300 MHz

4. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
B	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
C	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
D	Under no circumstances, FCC rules take priority

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third-party traffic
B	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
C	You must keep a record of the date, time, frequency, power level, and stations worked
D	You must keep a record of the manufacturer of your equipment and the antenna used

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Wireless Telecommunications Bureau
B	The Universal Licensing System
C	The Federal Communications Commission
D	A Volunteer Examiner Coordinator

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
B	Under no circumstances except for emergencies
C	Only when the message is intended for licensed radio amateurs
D	Under any circumstances in which third party messages are permitted by FCC rules

8. - G2A06

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

Select	Answer
A	Less subject to interference from atmospheric static crashes
B	Ease of tuning on receive and immunity to impulse noise
C	Very high-fidelity voice modulation
D	Less bandwidth used and greater power efficiency

9. - G2B08

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

Select	Answer
A	Only SSTV contacts
B	Only contacts with other stations within the 48 contiguous states
C	Only contacts with stations not within the 48 contiguous states
D	Only digital contacts

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Operating full break-in
C	Closing station now
D	No US stations should call

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Toward the north
B	180 degrees from the station’s short-path heading
C	Along the gray line
D	Toward the rising sun

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	85 Hz
B	170 Hz
C	425 Hz
D	850 Hz

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	Ripples in the geomagnetic force
B	A thunderstorm that affects radio propagation
C	A temporary disturbance in Earth’s geomagnetic field
D	A sudden drop in the solar flux index

14. - G3B09

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the F2 region?

Select	Answer
A	180 miles
B	2,500 miles
C	12,000 miles
D	1,200 miles

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The D region
B	The F1 region
C	The F2 region
D	The E region

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

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

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Receiver
B	Antenna and feed line
C	All these choices are correct
D	Transmitter

18. - G4C03

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

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

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Prevent distortion of voice signals
B	Increase transmitter bass response for more natural-sounding SSB signals
C	Decrease high-frequency voice output to prevent out-of-band operation
D	Increase the apparent loudness of transmitted voice signals

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent damage to the battery due to excessive voltage at high illumination levels
B	To prevent overload by regulating the charging voltage
C	To prevent discharge of the battery through the panel during times of low or no illumination
D	To limit the current flowing from the panel to a safe value

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reluctance
B	Conductance
C	Reactance
D	Admittance

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	625 watts
B	5000 watts
C	2500 watts
D	8.75 watts

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A capacitor in parallel
B	An inductor in series
C	An inductor in parallel
D	A capacitor in series

24. - G6A01

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

Select	Answer
A	8.5 volts
B	6 volts
C	10.5 volts
D	12 volts

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	By creating an impedance in the current’s path
B	It converts common-mode current to differential mode current
C	By creating an out-of-phase current to cancel the common-mode current
D	Ferrites expel magnetic fields

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 1
B	Symbol 5
C	Symbol 2
D	Symbol 4

27. - G7B05

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

Select	Answer
A	8
B	16
C	3
D	6

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier noise figure
B	Input amplifier gain
C	Demodulator stage bandwidth
D	All these choices are correct

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient audio
B	Excessive bandwidth
C	Insufficient bandwidth
D	Frequency drift

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Quadrature response
B	Mixer interference
C	Intermediate interference
D	Image response

31. - G8C15

What does an FT8 signal report of +3 mean?

Select	Answer
A	The signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth
B	The signal is S3 (weak signals)
C	The signal is 3 times the noise level of an equivalent SSB signal
D	The signal is 3 dB over S9

32. - G9A04

What causes reflected power at an antenna’s feed point?

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

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	16 feet
B	21 feet
C	8 feet
D	11 feet

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The spacing of each element along the boom
B	The physical length of the boom
C	All these choices are correct
D	The number of elements on the boom

35. - G9D05

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

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

Figure G7-1