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

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1. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

SelectAnswer
AChange to a non-polarized antenna with higher gain
BUse an antenna with a higher front-to-back ratio
CTake precautions to ensure that the antenna cannot be pointed in their direction when they are present
DAll these choices are correct

2. - G0B11

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

SelectAnswer
ALightning grounds must be connected to all ungrounded wiring
BBends in ground wires must be made as close as possible to a right angle
CThey must be bonded to all buried water and gas lines
DThey must be bonded together with all other grounds

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

SelectAnswer
A21.275 MHz to 21.300 MHz
BAll these choices are correct
C28.000 MHz to 28.025 MHz
D7.125 MHz to 7.175 MHz

4. - G1B04

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

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

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

SelectAnswer
A100 watts PEP output
B1000 watts PEP output
C1500 watts PEP output
D2000 watts PEP output

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 be a resident of the US for a minimum of 5 years
CThe person’s home citizenship must be in ITU region 2
DThe person must hold an FCC granted amateur radio license of General class or above

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

SelectAnswer
AThe message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log
BThey must be for other licensed amateurs
CThey must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
DThey must relate to emergencies or disaster relief

8. - G2A04

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

SelectAnswer
AUpper sideband
BDouble sideband
CSuppressed sideband
DLower sideband

9. - G2B11

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

SelectAnswer
ANo more than 1 hour per month
BNo more than 2 hours per week
CNo more than 1 hour per week
DNo more than 2 hours per month

10. - G2C10

What does the Q signal “QRN” mean?

SelectAnswer
AZero beat my signal
BStop sending
CSend more slowly
DI am troubled by static

11. - G2D08

Why do many amateurs keep a station log?

SelectAnswer
AThe FCC requires a log of all international contacts
BThe FCC requires a log of all international third-party traffic
CThe log provides evidence of operation needed to renew a license without retest
DTo help with a reply if the FCC requests information about your station

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

SelectAnswer
ATo provide high-speed data services during an emergency or community event
BTo provide DX spotting reports to aid contesters and DXers
CTo provide FM repeater coverage in remote areas
DTo provide real time propagation data by monitoring amateur radio transmissions worldwide

13. - G3A13

What does the A-index measure?

SelectAnswer
AThe solar radio flux at Boulder, Colorado
BThe amount of polarization of the Sun’s electric field
CThe relative position of sunspots on the surface of the Sun
DThe long-term stability of Earth’s geomagnetic field

14. - G3B12

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

SelectAnswer
AHigh levels of atmospheric noise or static
BPoor propagation at any time of day
CWorld-wide propagation during daylight hours
DHeavy distortion on signals due to photon absorption

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

SelectAnswer
AThe lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
BThe long path azimuth of a distant station
CThe highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
DThe short path azimuth of a distant station

16. - G4A13

What is the purpose of using a receive attenuator?

SelectAnswer
ATo reduce excessive audio level on strong signals
BTo prevent receiver overload from strong incoming signals
CTo reduce power consumption when operating from batteries
DTo reduce the transmitter power when driving a linear amplifier

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

SelectAnswer
AThe local oscillator of the transmitter
BAn external RF oscillator
CThe attenuated RF output of the transmitter
DThe transmitter balanced mixer output

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

SelectAnswer
ABonding all equipment enclosures together
BUsing surge suppressor power outlets
CBuilding all equipment in a metal enclosure
DPlacing low-pass filters on all feed lines

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

SelectAnswer
ADistorted speech
BExcessive background noise
CAll these choices are correct
DExcess intermodulation products

20. - G4E05

Which of the following most limits an HF mobile installation?

SelectAnswer
AFCC rules limiting mobile output power on the 75-meter band
BEfficiency of the electrically short antenna
CThe wire gauge of the DC power line to the transceiver
D“Picket fencing”

21. - G5A12

What occurs in an LC circuit at resonance?

SelectAnswer
AInductive reactance and capacitive reactance cancel
BCurrent and voltage are equal
CResistance is cancelled
DThe circuit radiates all its energy in the form of radio waves

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

SelectAnswer
AApproximately 11 milliwatts
BApproximately 11 watts
CApproximately 61 watts
DApproximately 61 milliwatts

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

SelectAnswer
A5.9 ohms
B80 ohms
C17 ohms
D0.17 ohms

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

SelectAnswer
AEnhancement and depletion modes
BThe active region (between cutoff and saturation)
CSaturation and cutoff
DPeak and valley current points

25. - G6B08

How is an LED biased when emitting light?

SelectAnswer
AForward biased
BReverse biased
CIn the tunnel-effect region
DAt the Zener voltage

26. - G7A05

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

SelectAnswer
A90 degrees
B270 degrees
C360 degrees
D180 degrees

27. - G7B03

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

SelectAnswer
AOutput is low when either or both inputs are high
BOutput is low only when both inputs are high
COutput is high when either or both inputs are low
DOutput is high only when both inputs are high

28. - G7C01

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

SelectAnswer
ACarrier oscillator
BRF amplifier
CIF amplifier
DFilter

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

SelectAnswer
AFrequency modulation
BAmplitude modulation
CPhase modulation
DPower modulation

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

SelectAnswer
A60 kHz
B101.75 Hz
C5 kHz
D416.7 Hz

31. - G8C08

Which of the following statements is true about PSK31?

SelectAnswer
AHigher power is needed as compared to RTTY for similar error rates
BError correction is used to ensure accurate message reception
CUpper case letters are sent with more power
DUpper case letters use longer Varicode bit sequences and thus slow down transmission

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

SelectAnswer
AAttenuation decreases
BAttenuation follows Marconi’s Law of Attenuation
CAttenuation increases
DAttenuation is independent of frequency

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

SelectAnswer
AIt peaks at about 1/8 wavelength above ground
BIt steadily increases
CIt is unaffected by the height above ground
DIt steadily decreases

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

SelectAnswer
A3/4 wavelength
B1/4 wavelength
C1/2 wavelength
D1 wavelength

35. - G9D05

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

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