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

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	They must be bonded together with all other grounds
B	Bends in ground wires must be made as close as possible to a right angle
C	Lightning grounds must be connected to all ungrounded wiring
D	They must be bonded to all buried water and gas lines

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The lower frequency portion
B	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz
C	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz
D	The upper frequency portion

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Automatic identification of repeaters
B	Observation of propagation and reception
C	Transmission of bulletins of general interest to amateur radio licensees
D	All these choices are correct

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1000 watts PEP output
B	1500 watts PEP output
C	200 watts PEP output
D	1200 watts PEP output

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

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	No third-party traffic may be transmitted
C	The station initiating the contact must be under local or remote control
D	The control operator of the interrogating station must hold an Amateur Extra class license

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

Select	Answer
A	Upper sideband
B	Suppressed sideband
C	Lower sideband
D	Double sideband

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Inform your local emergency coordinator
C	Acknowledge the station in distress and determine what assistance may be needed
D	Immediately cease all transmissions

10. - G2C10

What does the Q signal “QRN” mean?

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

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	USB
B	LSB
C	DSB
D	CW

13. - G3A12

What does the K-index measure?

Select	Answer
A	The short-term stability of the Sun’s magnetic field
B	The relative position of sunspots on the surface of the Sun
C	The short-term stability of Earth’s geomagnetic field
D	The solar radio flux at Boulder, Colorado

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Time of day and season
B	Solar radiation and ionospheric disturbances
C	All these choices are correct
D	Path distance and location

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	Short-path
D	Scatter

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To balance the transmitter audio frequency response
B	To increase overall efficiency
C	To reduce harmonic radiation
D	To prevent excessive drive

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two swept frequency tones
B	Two audio frequency range square wave signals of equal amplitude
C	Two audio signals of the same frequency shifted 90 degrees
D	Two non-harmonically related audio signals

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	Severely distorted audio
B	A chirpy CW signal
C	A CW signal at a nearly pure audio frequency
D	On-and-off humming or clicking

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Distorted speech
B	Excessive background noise
C	All these choices are correct
D	Excess intermodulation products

20. - G4E08

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

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

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Admittance
B	Reluctance
C	Reactance
D	Conductance

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	173 volts
B	245 volts
C	346 volts
D	692 volts

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

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	High power handling capability
B	Better suited for RF amplification
C	Better suited for power supply regulation
D	Low power consumption

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	All these choices are correct
B	Transformers and transducers
C	Capacitors and inductors
D	Diodes

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is low when either or both inputs are high
B	Output is high only when both inputs are high
C	Output is high when either or both inputs are low
D	Output is low only when both inputs are high

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	RF amplifier
C	Carrier oscillator
D	IF amplifier

29. - G8A08

Which of the following is an effect of overmodulation?

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

30. - G8B01

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

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

31. - G8C06

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

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

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The radius of the conductors and the frequency of the signal
C	The distance between the centers of the conductors and the length of the line
D	The frequency of the signal and the length of the 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. - G9C01

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

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

35. - G9D04

What is the primary function of antenna traps?

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