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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The total RF exposure averaged over a certain period
B	The average amount of power developed by the transmitter over a specific 24-hour period
C	The total time of the exposure
D	The average time it takes RF radiation to have any long-term effect on the body

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	In series with each ground lead
B	On the antenna, opposite the feed point
C	At the closest power pole ground electrode
D	Where the feed lines enter the building

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.025 MHz to 28.300 MHz only
B	28.000 MHz to 28.025 MHz only
C	28.000 MHz to 28.300 MHz only
D	The entire band

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be posted on the internet or published in a national periodical
B	The frequency must be coordinated with the National Beacon Organization
C	All these choices are correct
D	No more than one beacon station may transmit in the same band from the same station location

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1000 watts PEP output
B	2000 watts PEP output
C	1500 watts PEP output
D	100 watts PEP output

6. - G1D05

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

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

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 2
B	Region 3
C	Region 4
D	Region 1

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband is transmitted; the other sideband and carrier are suppressed
B	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
C	Only one sideband and the carrier are transmitted; the other sideband is suppressed
D	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands

9. - G2B11

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

Select	Answer
A	No more than 2 hours per week
B	No more than 2 hours per month
C	No more than 1 hour per week
D	No more than 1 hour per month

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Zero beat my signal
B	I am troubled by static
C	Stop sending
D	Send more slowly

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	All these choices are correct
B	Submit a log to the contest sponsor
C	Send a QSL card to the stations worked, or QSL via Logbook of The World
D	Identify your station according to normal FCC regulations

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	CW
B	USB
C	DSB
D	LSB

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A temporary disturbance in Earth’s geomagnetic field
B	A thunderstorm that affects radio propagation
C	Ripples in the geomagnetic force
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	1,200 miles
C	2,500 miles
D	12,000 miles

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Faraday rotation
B	Chordal hop
C	Scatter
D	Short-path

16. - G4A08

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

Select	Answer
A	Minimum plate current without exceeding maximum allowable grid current
B	Highest plate voltage while minimizing grid current
C	Minimum SWR on the antenna
D	Desired power output without exceeding maximum allowable plate current

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An ammeter
B	An ohmmeter
C	A signal generator
D	An oscilloscope

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	All these choices are correct
B	Solder has too high a dielectric constant to provide adequate lightning protection
C	A soldered joint will likely be destroyed by the heat of a lightning strike
D	Solder flux will prevent a low conductivity connection

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It reduces intermodulation distortion
B	It increases peak power
C	It increases average power
D	It reduces harmonic distortion

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

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	2.00
B	0.707
C	1.414
D	1.00

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

Select	Answer
A	70 millihenries
B	7 millihenries
C	14.3 millihenries
D	1,000 millihenries

24. - G6A12

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

Select	Answer
A	To decrease plate resistance
B	To increase the control grid resistance
C	To increase efficiency
D	To reduce grid-to-plate capacitance

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	4 GHz
B	500 MHz
C	50 MHz
D	40 GHz

26. - G7A06

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

Select	Answer
A	180 degrees
B	270 degrees
C	360 degrees
D	90 degrees

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

Select	Answer
A	A circulator and a filter operating in a feed-forward loop
B	A filter and an amplifier operating in a feedback loop
C	An amplifier and a divider
D	A frequency multiplier and a mixer

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	A wide range of filter bandwidths and shapes can be created
B	The DSP filter is much more effective at VHF frequencies
C	Mixing products are greatly reduced
D	Fewer digital components are required

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By reconfiguring the CW keying input to act as a tone generator
B	By changing an oscillator’s frequency directly with a digital control signal
C	By using a transceiver’s computer data interface protocol to change frequencies
D	By keying an FM transmitter with a sub-audible tone

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Balanced converter
B	Reactance modulator
C	Multiplier
D	Mixer

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	432 MHz
B	902 MHz
C	10.7 GHz
D	2.4 GHz

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	75 ohms
B	100 ohms
C	450 ohms
D	50 ohms

33. - G9B02

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

Select	Answer
A	Slope the radials upward
B	Slope the radials downward
C	Coil the radials
D	Lengthen the radials beyond one wavelength

34. - G9C05

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

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

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Impedance varies periodically as a function of frequency
B	SWR varies periodically as a function of boom length
C	Element length and spacing vary logarithmically along the boom
D	Gain varies logarithmically as a function of frequency