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US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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1. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

SelectAnswer
ASecure written permission from your neighbors to operate above the controlled MPE limits
BAll these choices are correct
CFile an Environmental Impact Statement (EIS-97) with the FCC
DTake action to prevent human exposure to the excessive RF fields

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

SelectAnswer
A25 amperes
B20 amperes
C30 amperes
D15 amperes

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

SelectAnswer
A60 meters, 30 meters, 17 meters, and 12 meters
B80 meters, 40 meters, 20 meters, and 15 meters
C160 meters, 60 meters, 15 meters, and 12 meters
D80 meters, 20 meters, 15 meters, and 10 meters

4. - G1B02

With which of the following conditions must beacon stations comply?

SelectAnswer
AAll these choices are correct
BNo more than one beacon station may transmit in the same band from the same station location
CThe frequency must be posted on the internet or published in a national periodical
DThe frequency must be coordinated with the National Beacon Organization

5. - G1C07

What must be done before using a new digital protocol on the air?

SelectAnswer
APublicly document the technical characteristics of the protocol
BSubmit a rule-making proposal to the FCC describing the codes and methods of the technique
CType-certify equipment to FCC standards
DObtain an experimental license from the FCC

6. - G1D04

Who must observe the administration of a Technician class license examination?

SelectAnswer
AAt least two Volunteer Examiners of General class or higher
BAt least three Volunteer Examiners of Technician class
CAt least three Volunteer Examiners of General class or higher
DAt least two Volunteer Examiners of Technician class or higher

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
BNo third-party traffic may be transmitted
CThe station initiating the contact must be under local or remote control
DThe control operator of the interrogating station must hold an Amateur Extra class license

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

SelectAnswer
ASSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
BSSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
COnly one sideband is transmitted; the other sideband and carrier are suppressed
DOnly one sideband and the carrier are transmitted; the other sideband is suppressed

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

SelectAnswer
A150 Hz to 500 Hz
B3 kHz to 6 kHz
C5 Hz to 50 Hz
D1 kHz to 3 kHz

10. - G2C04

What does the Q signal “QRL?” mean?

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

11. - G2D09

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

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

12. - G2E02

What is VARA?

SelectAnswer
AA DX spotting system using a network of software defined radios
BA radio direction finding system used on VHF and UHF
CA digital protocol used with Winlink
DA low signal-to-noise digital mode used for EME (moonbounce)

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

SelectAnswer
AThe position of the Moon in its orbit
BCyclic variation in Earth’s radiation belts
CLong term oscillations in the upper atmosphere
DRotation of the Sun’s surface layers around its axis

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

SelectAnswer
AHeavy distortion on signals due to photon absorption
BHigh levels of atmospheric noise or static
CPoor propagation at any time of day
DWorld-wide propagation during daylight hours

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

SelectAnswer
AThe E region
BThe F2 region
CThe F1 region
DThe D region

16. - G4A06

What is the purpose of an antenna tuner?

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

17. - G4B07

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

SelectAnswer
ATwo audio frequency range square wave signals of equal amplitude
BTwo audio signals of the same frequency shifted 90 degrees
CTwo swept frequency tones
DTwo non-harmonically related audio signals

18. - G4C10

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

SelectAnswer
AAn item of station equipment starts to draw excessive amounts of current
BYou receive reports of harmonic interference from your station
CYou receive reports of “hum” on your station’s transmitted signal
DThe SWR reading for one or more antennas is suddenly very high

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

SelectAnswer
AAt least 1 kHz above the edge of the segment
BAt least 1 kHz below the edge of the segment
CAt least 3 kHz below the edge of the segment
DAt least 3 kHz above the edge of the segment

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

SelectAnswer
ATo the battery using heavy-gauge wire
BTo the alternator or generator using heavy-gauge wire
CTo the battery using insulated heavy duty balanced transmission line
DTo the alternator or generator using insulated heavy duty balanced transmission line

21. - G5A07

What is the term for the inverse of impedance?

SelectAnswer
AReluctance
BConductance
CAdmittance
DSusceptance

22. - G5B09

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

SelectAnswer
A8.5 volts
B34 volts
C24 volts
D12 volts

23. - G5C07

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

SelectAnswer
A3.5 to 1
B144 to 1
C12 to 1
D24 to 1

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

SelectAnswer
A1.0 volts
B0.1 volt
C0.7 volts
D0.3 volts

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

SelectAnswer
A500 MHz
B4 GHz
C40 GHz
D50 MHz

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

SelectAnswer
AFewer circuit components are required
BInherently more stable
CHigh-frequency operation allows the use of smaller components
DFaster switching time makes higher output voltage possible

27. - G7B06

What is a shift register?

SelectAnswer
AA digital mixer
BA clocked array of circuits that passes data in steps along the array
CAn array of operational amplifiers used for tri-state arithmetic operations
DAn analog mixer

28. - G7C12

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

SelectAnswer
ANotch frequency
BNeper frequency
CRolloff frequency
DCutoff frequency

29. - G8A12

What is QPSK modulation?

SelectAnswer
AModulation using quadra-pole sideband keying to generate spread spectrum signals
BModulation using quasi-parallel to serial conversion to reduce bandwidth
CModulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
DModulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

SelectAnswer
ABandwidth is half the symbol rate
BHigher symbol rates require wider bandwidth
CSymbol rate and bandwidth are not related
DLower symbol rates require wider bandwidth

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

SelectAnswer
APacket was received without error
BEntire file received correctly
CReceiving station connected and ready for transmissions
DRequest retransmission of the packet

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

SelectAnswer
AThere is no relationship between transmission line loss and SWR
BHigh SWR makes it difficult to measure transmission line loss
CHigh SWR reduces the relative effect of transmission line loss
DHigh SWR increases loss in a lossy transmission line

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

SelectAnswer
AIf the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
BIf the antenna is too high, the pattern becomes unpredictable
CIf the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
DAntenna height has no effect on the pattern

34. - G9C07

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

SelectAnswer
AThe number of directors versus the number of reflectors
BThe relative position of the driven element with respect to the reflectors and directors
CThe ratio of forward gain to dipole gain
DThe power radiated in the major lobe compared to that in the opposite direction

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

SelectAnswer
AHarmonic suppression
BWide bandwidth
CHigher gain per element than a Yagi antenna
DPolarization diversity