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. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

Select	Answer
A	All these choices are correct
B	Post a copy of FCC Part 97.13 in the station
C	Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas
D	Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Always hold on to the tower with one hand
B	Ensure that all heavy tools are securely fastened to the harness
C	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
D	All these choices are correct

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	21.275 MHz to 21.300 MHz
C	All these choices are correct
D	7.125 MHz to 7.175 MHz

4. - G1B02

With which of the following conditions must beacon stations comply?

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

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	1500 watts PEP output
B	50 watts PEP output
C	An effective radiated power equivalent to 100 watts from a half-wave dipole
D	200 watts PEP output

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	16 years
B	18 years
C	There is no age limit
D	21 years

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Under no circumstances
B	Only during an FCC-declared general state of communications emergency
C	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
D	Only if the 10-meter repeater control operator holds at least a General class license

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Transmit audio or microphone gain
B	Attenuator level
C	RF clipping level
D	Antenna inductance or capacitance

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Nets have priority
B	Except during emergencies, no amateur station has priority access to any frequency
C	QSOs in progress have priority
D	Contest operations should yield to non-contest use of frequencies

10. - G2C10

What does the Q signal “QRN” mean?

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

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
B	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary
C	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
D	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Call on any frequency in the waterfall except the station’s frequency
B	Find a clear frequency during the same time slot as the calling station
C	Always call on the station’s frequency
D	Find a clear frequency during the alternate time slot to the calling station

13. - G3A05

What is the solar flux index?

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

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Propagation over the path on all HF frequencies is enhanced
B	HF communications over the path are enhanced
C	Propagation via ordinary skywave communications is not possible over that path
D	Double-hop propagation along the path is more common

15. - G3C07

What makes HF scatter signals often sound distorted?

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

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier power supply to reach operating level
B	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
C	To prevent key clicks on CW
D	To prevent transient overmodulation

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When high precision is desired
B	When adjusting circuits for maximum or minimum values
C	When testing logic circuits
D	When measuring the frequency of an oscillator

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	You receive reports of “hum” on your station’s transmitted signal
B	An item of station equipment starts to draw excessive amounts of current
C	The SWR reading for one or more antennas is suddenly very high
D	You receive reports of harmonic interference from your station

19. - G4D01

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

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

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	“Picket fencing”
B	Efficiency of the electrically short antenna
C	The wire gauge of the DC power line to the transceiver
D	FCC rules limiting mobile output power on the 75-meter band

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	12 volts
B	34 volts
C	8.5 volts
D	24 volts

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	25.5 volts
B	40 volts
C	360 volts
D	120 volts

24. - G6A09

Which of the following describes MOSFET construction?

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

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	By creating an out-of-phase current to cancel the common-mode current
C	Ferrites expel magnetic fields
D	It converts common-mode current to differential mode current

26. - G7A05

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

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

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Divide the DC input power by the DC output power
C	Divide the RF output power by the DC input power
D	Add the RF input power to the DC 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. - G8A03

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

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

30. - G8B12

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

Select	Answer
A	Intermodulation
B	Detection
C	Heterodyning
D	Rolloff

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Trailer
B	Directory
C	Preamble
D	Header

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
B	The feed line must be an odd number of electrical quarter wavelengths long
C	The antenna feed point must be at DC ground potential
D	The feed line must be an even number of physical half wavelengths long

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower ground losses
B	Shorter radials
C	Lower radiation resistance
D	Lower feed point impedance

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Larger-diameter elements
B	Loading coils in series with the element
C	Tapered-diameter elements
D	Closer element spacing

35. - G9D04

What is the primary function of antenna traps?

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