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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An SWR meter with a peak-reading function
B	A calibrated field strength meter with a calibrated antenna
C	An oscilloscope with a high-stability crystal marker generator
D	A receiver with digital signal processing (DSP) noise reduction

2. - G0B09

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

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

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	60 meters
B	12 meters
C	30 meters
D	11 meters

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	Under no circumstances, FCC rules take priority
C	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
D	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

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	PEP output from the transmitter
B	PEP input to the antenna
C	RMS input to the antenna
D	RMS output from the transmitter

6. - G1D11

What action is required to obtain a new General class license after a previously held license has expired and the two-year grace period has passed?

Select	Answer
A	The applicant must show proof of the appropriate expired license grant and pass the current Element 2 exam
B	There are no requirements other than being able to show a copy of the expired license
C	Contact the FCC to have the license reinstated
D	They must have a letter from the FCC showing they once held an amateur or commercial license

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When messages are not encrypted
B	Under no circumstances
C	When under automatic control
D	When messages are encrypted

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Double sideband
B	Single sideband
C	Single phase modulation
D	Frequency modulation

9. - G2B11

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

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

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Will you keep the frequency clear?”
B	“Are you busy?” or “Is this frequency in use?”
C	“Are you operating full break-in?” or “Can you operate full break-in?”
D	“Are you listening only for a specific station?”

11. - G2D06

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

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

12. - G2E06

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

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

13. - G3A05

What is the solar flux index?

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

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency for communications between two points
B	The Maximum Usable Frequency during a 24-hour period
C	The Minimum Usable Frequency during a 24-hour period
D	The Minimum Usable Frequency for communications between two points

15. - G3C07

What makes HF scatter signals often sound distorted?

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

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By temporarily increasing received bandwidth
B	By redirecting noise pulses into a filter capacitor
C	By clipping noise peaks
D	By reducing receiver gain during a noise pulse

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of suppression of the carrier and undesired sideband for SSB
B	Percentage of carrier phase shift
C	Linearity
D	Percentage of frequency modulation

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Bypass inductor
B	Bypass capacitor
C	Forward-biased diode
D	Reverse-biased diode

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 2 times
B	Approximately 1.5 times
C	Approximately 8 times
D	Approximately 4 times

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	The solar panel must have a charge controller
B	A series resistor must be in place
C	Ground the solar panel outer metal framework
D	Ensure the battery is placed terminals-up

21. - G5A08

What is impedance?

Select	Answer
A	The ratio of current to voltage
B	The product of current and voltage
C	The ratio of voltage to current
D	The product of current and reactance

22. - G5B14

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

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

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	3.5 to 1
B	12 to 1
C	144 to 1
D	24 to 1

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is separated from the drain by a thin insulating layer
B	The gate is separated from the channel by a thin insulating layer
C	The gate is formed by a back-biased junction
D	The source is formed by depositing metal on silicon

25. - G6B11

What is an SMA connector?

Select	Answer
A	A connector designed for serial multiple access signals
B	A small threaded connector suitable for signals up to several GHz
C	A type-S to type-M adaptor
D	A type of push-on connector intended for high-voltage applications

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It eliminates ground loop current
B	It removes shock hazards from the induction coils
C	It acts as a fuse for excess voltage
D	It discharges the filter capacitors when power is removed

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC output power
B	Divide the RF output power by the DC input power
C	Add the RF input power to the DC output power
D	Multiply the RF input power by the reciprocal of the RF output power

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	90 degrees
B	45 degrees
C	180 degrees
D	Zero

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The bandwidth of the modulated signal
B	The carrier frequency that contains the signal
C	Spurious signals that envelop nearby frequencies
D	The waveform created by connecting the peak values of the modulated signal

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Lower symbol rates require wider bandwidth
B	Symbol rate and bandwidth are not related
C	Bandwidth is half the symbol rate
D	Higher symbol rates require wider bandwidth

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	Packets will be routed incorrectly
B	The checksum overflows
C	The connection is dropped
D	Encoding reverts to the default character set

32. - G9A03

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

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

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	On the surface or buried a few inches below the ground
B	As high as possible above the ground
C	Parallel to the antenna element
D	At the center of the antenna

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The number of directors versus the number of reflectors
B	The relative position of the driven element with respect to the reflectors and directors
C	The ratio of forward gain to dipole gain
D	The power radiated in the major lobe compared to that in the opposite direction

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To enable multiband operation
B	To notch spurious frequencies
C	To prevent out-of-band operation
D	To provide balanced feed point impedance