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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	Its power density
C	All these choices are correct
D	Its frequency

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	The generator must be insulated from ground
B	The generator should be operated in a well-ventilated area
C	All these choices are correct
D	Fuel should be stored near the generator for rapid refueling in case of an emergency

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	14250 kHz
B	18155 kHz
C	21300 kHz
D	24900 kHz

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	Unidentified test transmissions of less than 10 seconds in duration
B	Transmissions to assist with learning the International Morse code
C	All these choices are correct
D	Regular transmissions offering equipment for sale, if intended for amateur radio use

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	200 watts PEP output
B	1000 watts PEP output
C	2000 watts PEP output
D	1500 watts PEP output

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of the remote station’s country and the FCC’s third-party regulations
B	Those of both the remote station’s country and the FCC
C	Only those of the FCC
D	Only those of the remote station’s country

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 4
C	Region 1
D	Region 3

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband is more efficient than upper sideband at these frequencies
B	It is commonly accepted amateur practice
C	Because it is fully compatible with an AM detector
D	Lower sideband is the only sideband legal on these frequency bands

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	A person holding an FCC-issued amateur operator license or an appropriate government official
B	Only a RACES net control operator
C	Any control operator when normal communication systems are operational
D	Only a person holding an FCC-issued amateur operator license

10. - G2C10

What does the Q signal “QRN” mean?

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

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international third-party traffic
B	To help with a reply if the FCC requests information about your station
C	The log provides evidence of operation needed to renew a license without retest
D	The FCC requires a log of all international contacts

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	Frequent retries or timeouts
B	Failure to establish a connection between stations
C	All these choices are correct
D	Long pauses in message transmission

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	At any point
B	Only at the maximum point
C	At the summer solstice
D	Only at the minimum point

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	A slightly delayed echo might be heard
B	Periodic fading approximately every 10 seconds
C	The signal might be cancelled causing severe attenuation
D	Signal strength increased by 3 dB

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of temperature inversions
B	Because it is the highest
C	Because it is the densest
D	Because of the Doppler effect

16. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	ALC will invert the modulation of the AFSK mode
B	When using digital modes, too much ALC activity can cause the transmitter to overheat
C	All these choices are correct
D	The ALC action distorts the signal

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Power output from a transmitter
B	Front-to-back ratio of an antenna
C	Impedance of coaxial cable
D	Gain of a directional antenna

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	Distorted speech
D	Clearly audible speech

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	12 dB
B	18 dB
C	15 dB
D	6 dB

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Bypass
B	Series-parallel
C	Full-wave bridge
D	Shunt

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Conductance
B	Reluctance
C	Susceptance
D	Admittance

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	1.4 watts
B	400 watts
C	100 watts
D	353.5 watts

23. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

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

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	Much less leakage than any other type
B	High capacitance for a given volume
C	Tight tolerance
D	Inexpensive RF capacitor

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	Most of the magnetic field is contained in the core
B	Large values of inductance may be obtained
C	All these choices are correct
D	The magnetic properties of the core may be optimized for a specific range of frequencies

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 7
B	Symbol 11
C	Symbol 6
D	Symbol 1

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	100%
B	More than 50% but less than 100%
C	Less than 50%
D	50%

28. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

Select	Answer
A	Cutoff frequency
B	Rolloff frequency
C	Neper frequency
D	Notch frequency

29. - G8A03

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

Select	Answer
A	Frequency convolution
B	Frequency transformation
C	Frequency modulation
D	Frequency conversion

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	RF input
B	Beat frequency oscillator
C	Local oscillator
D	Image frequency

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 3 times the noise level of an equivalent SSB signal
C	The signal is 3 dB over S9
D	The signal is S3 (weak signals)

32. - G9A03

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

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

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It is more effective on the lower HF bands than on the higher bands
B	It produces only vertically polarized radiation
C	It must be longer than 1 wavelength
D	Station equipment may carry significant RF current

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 6 dB higher
B	Approximately 3 dB higher
C	Approximately 9 dB higher
D	Approximately 1.5 dB higher

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	Broadside to the plane of the halo
B	Omnidirectional in the plane of the halo
C	On the same side as the feed point
D	Opposite the feed point

Figure G7-1