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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?

SelectAnswer
AAn SWR meter with a peak-reading function
BA calibrated field strength meter with a calibrated antenna
CAn oscilloscope with a high-stability crystal marker generator
DA receiver with digital signal processing (DSP) noise reduction

2. - G0B04

Where should the station’s lightning protection ground system be located?

SelectAnswer
AParallel to the water supply line
BNext to the closest power pole
CAs close to the station equipment as possible
DOutside the building

3. - G1A02

On which of the following bands is phone operation prohibited?

SelectAnswer
A30 meters
B17 meters
C160 meters
D12 meters

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

SelectAnswer
AOccasional retransmission of weather and propagation forecast information from US government stations
BAutomatic retransmission of other amateur signals by any amateur station
CEncrypted messages, if not intended to facilitate a criminal act
DUnidentified transmissions of less than 10 seconds duration for test purposes only

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

SelectAnswer
A19.6 kilobaud
B56 kilobaud
C1200 baud
D300 baud

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

SelectAnswer
ANone of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
BThe person must hold an FCC granted amateur radio license of General class or above
CThe person’s home citizenship must be in ITU region 2
DThe person must be a resident of the US for a minimum of 5 years

7. - G1E03

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

SelectAnswer
AThe interrogating transmission must be made by another automatically controlled station
BThe control operator of the interrogating station must hold an Amateur Extra class license
CNo third-party traffic may be transmitted
DThe station initiating the contact must be under local or remote control

8. - G2A04

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

SelectAnswer
ASuppressed sideband
BUpper sideband
CLower sideband
DDouble sideband

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

SelectAnswer
AOnly digital contacts
BOnly contacts with stations not within the 48 contiguous states
COnly SSTV contacts
DOnly contacts with other stations within the 48 contiguous states

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

SelectAnswer
AListening only for a specific station or stations
BNo US stations should call
COperating full break-in
DClosing station now

11. - G2D09

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

SelectAnswer
AIdentify your station according to normal FCC regulations
BAll these choices are correct
CSend a QSL card to the stations worked, or QSL via Logbook of The World
DSubmit a log to the contest sponsor

12. - G2E04

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

SelectAnswer
ACall on any frequency in the waterfall except the station’s frequency
BAlways call on the station’s frequency
CFind a clear frequency during the same time slot as the calling station
DFind a clear frequency during the alternate time slot to the calling station

13. - G3A04

Which of the following are the least reliable bands for long-distance communications during periods of low solar activity?

SelectAnswer
A80 meters and 160 meters
B30 meters and 20 meters
C60 meters and 40 meters
D15 meters, 12 meters, and 10 meters

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

SelectAnswer
AThey are refracted and trapped in the ionosphere to circle Earth
BThey are refracted back to Earth
CThey are attenuated before reaching the destination
DThey pass through the ionosphere

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

SelectAnswer
AThe F region is unstable during daylight hours
BThe D region absorbs signals at these frequencies during daylight hours
CThe F region absorbs signals at these frequencies during daylight hours
DThe E region is unstable during daylight hours

16. - G4A06

What is the purpose of an antenna tuner?

SelectAnswer
AIncrease power transfer from the transmitter to the feed line
BAll these choices are correct
CReduce the SWR in the feed line to the antenna
DReduce the power dissipation in the feedline to the antenna

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

SelectAnswer
AGeneration of harmonics which interfere with frequency readings
BDesensitization which can cause intermodulation products which interfere with impedance readings
CAll these choices are correct
DReceived power that interferes with SWR readings

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

SelectAnswer
AConnect the center conductor to the shield of all cables to short circuit the RFI signal
BAdd an additional insulating jacket to the cable
CGround the center conductor of the audio cable causing the interference
DPlace a ferrite choke on the cable

19. - G4D02

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

SelectAnswer
AIt increases peak power
BIt reduces harmonic distortion
CIt increases average power
DIt reduces intermodulation distortion

20. - G4E08

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

SelectAnswer
ABypass
BSeries-parallel
CShunt
DFull-wave bridge

21. - G5A03

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

SelectAnswer
AReluctance
BReactance
CAdmittance
DConductance

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

SelectAnswer
AApproximately 6 dB
BApproximately 3 dB
CApproximately 9 dB
DApproximately 2 dB

23. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

SelectAnswer
ACapacitive coupling
BMutual inductance
CMutual capacitance
DDisplacement current coupling

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

SelectAnswer
AScreen grid
BSuppressor grid
CTrigger electrode
DControl grid

25. - G6B03

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

SelectAnswer
ABetter suited for power supply regulation
BHigh power handling capability
CBetter suited for RF amplification
DLow power consumption

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

SelectAnswer
AThe ripple frequency is twice that of a full-wave rectifier
BThe output voltage is two times the peak input voltage
CMore current can be drawn from the half-wave rectifier
DOnly one diode is required

27. - G7B07

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

SelectAnswer
AA frequency multiplier and a mixer
BA circulator and a filter operating in a feed-forward loop
CA filter and an amplifier operating in a feedback loop
DAn amplifier and a divider

28. - G7C01

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

SelectAnswer
AFilter
BIF amplifier
CRF amplifier
DCarrier oscillator

29. - G8A06

Which of the following is characteristic of QPSK31?

SelectAnswer
AAll these choices are correct
BIts encoding provides error correction
CIts bandwidth is approximately the same as BPSK31
DIt is sideband sensitive

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

SelectAnswer
A8 kHz
B3 kHz
C16 kHz
D5 kHz

31. - G8C15

What does an FT8 signal report of +3 mean?

SelectAnswer
AThe signal is S3 (weak signals)
BThe signal is 3 times the noise level of an equivalent SSB signal
CThe signal is 3 dB over S9
DThe signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

SelectAnswer
A1:2
B5:1
C1:5
D2:1

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

SelectAnswer
A24 feet
B16 feet
C33 feet
D8 feet

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

SelectAnswer
AIt does not require the driven element to be insulated from the boom
BIt is useful for matching multiband antennas
CIt does not require any inductors or capacitors
DAll these choices are correct

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

SelectAnswer
AIt narrows the main lobe in elevation
BIt allows quick selection of vertical or horizontal polarization
CIt allows simultaneous vertical and horizontal polarization
DIt narrows the main lobe in azimuth