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

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1. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

SelectAnswer
AMake sure that MPE limits are not exceeded in occupied areas
BPosition the antenna along the edge of a wall to reduce parasitic radiation
CLocate the antenna close to your operating position to minimize feed-line radiation
DMake sure the antenna is properly shielded

2. - G0B10

Which of the following is a danger from lead-tin solder?

SelectAnswer
ATin in the solder can “cold flow,” causing shorts in the circuit
BRF energy can convert the lead into a poisonous gas
CHigh voltages can cause lead-tin solder to disintegrate suddenly
DLead can contaminate food if hands are not washed carefully after handling the solder

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

SelectAnswer
AAmateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
BAmateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
CAmateur stations may use the band only during emergencies
DAmateur stations must not cause harmful interference to primary users and must accept interference from primary users

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

SelectAnswer
AThey are not permitted
BThey may be used if they do not obscure the meaning of a message
CThey are limited to those expressly listed in Part 97 of the FCC rules
DOnly “Q” signals are permitted

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

SelectAnswer
A1000 watts PEP output
B2000 watts PEP output
C1500 watts PEP output
D200 watts PEP output

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

SelectAnswer
AGeneral and Technician
BTechnician only
CNone, only Amateur Extra class licensees may be accredited
DAmateur Extra, General, and Technician

7. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

SelectAnswer
AAnywhere in the non-phone segments of the 10-meter or shorter wavelength bands
BOnly in the non-phone Extra Class segments of the bands
CAnywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands
DOn any band segment where digital operation is permitted

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

SelectAnswer
AUpper sideband
BSuppressed sideband
CLower sideband
DDouble sideband

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

SelectAnswer
AListen for 2 minutes before calling CQ
BSend “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
CSend “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
DSend the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response

10. - G2C09

What does the Q signal “QSL” mean?

SelectAnswer
ASend slower
BI have received and understood
CWe have worked before
DWe have already confirmed the contact

11. - G2D09

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

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

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

SelectAnswer
AYou may be listening on the wrong sideband
BThe mark and space frequencies may be reversed
CYou may have selected the wrong baud rate
DAll these choices are correct

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

SelectAnswer
AOnly at the minimum point
BOnly at the maximum point
CAt any point
DAt the summer solstice

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 pass through the ionosphere
CThey are attenuated before reaching the destination
DThey are refracted back to Earth

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

16. - G4A09

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

SelectAnswer
ATo prevent transient overmodulation
BTo prevent key clicks on CW
CTo allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
DTo allow time for the amplifier power supply to reach operating level

17. - G4B05

Why do voltmeters have high input impedance?

SelectAnswer
AIt improves the frequency response
BIt allows for higher voltages to be safely measured
CIt improves the resolution of the readings
DIt decreases the loading on circuits being measured

18. - G4C04

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

SelectAnswer
AOn-and-off humming or clicking
BSeverely distorted audio
CA CW signal at a nearly pure audio frequency
DA chirpy CW signal

19. - G4D02

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

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

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

SelectAnswer
ATo prevent discharge of the battery through the panel during times of low or no illumination
BTo prevent overload by regulating the charging voltage
CTo limit the current flowing from the panel to a safe value
DTo prevent damage to the battery due to excessive voltage at high illumination levels

21. - G5A03

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

SelectAnswer
AAdmittance
BConductance
CReactance
DReluctance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

SelectAnswer
A20.6 percent
B12.2 percent
C10.9 percent
D25.9 percent

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

SelectAnswer
A7 millihenries
B70 millihenries
C1,000 millihenries
D14.3 millihenries

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

SelectAnswer
ATo increase efficiency
BTo increase the control grid resistance
CTo decrease plate resistance
DTo reduce grid-to-plate capacitance

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

SelectAnswer
ABy creating an impedance in the current’s path
BBy creating an out-of-phase current to cancel the common-mode current
CFerrites expel magnetic fields
DIt converts common-mode current to differential mode current

26. - G7A04

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

SelectAnswer
AMore current can be drawn from the half-wave rectifier
BOnly one diode is required
CThe ripple frequency is twice that of a full-wave rectifier
DThe output voltage is two times the peak input voltage

27. - G7B01

What is the purpose of neutralizing an amplifier?

SelectAnswer
ATo keep the carrier on frequency
BTo eliminate self-oscillations
CTo cut off the final amplifier during standby periods
DTo limit the modulation index

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
CCutoff frequency
DRolloff frequency

29. - G8A14

What is link margin?

SelectAnswer
AReceiver sensitivity plus 3 dB
BTransmit power minus receiver sensitivity
CThe difference between received power level and minimum required signal level at the input to the receiver
DThe opposite of fade margin

30. - G8B03

What is another term for the mixing of two RF signals?

SelectAnswer
AFrequency inversion
BSynthesizing
CPhase inversion
DHeterodyning

31. - G8C14

Which of the following describes a waterfall display?

SelectAnswer
AFrequency is horizontal, signal strength is vertical, time is intensity
BFrequency is vertical, signal strength is horizontal, time is intensity
CFrequency is horizontal, signal strength is intensity, time is vertical
DFrequency is vertical, signal strength is intensity, time is horizontal

32. - G9A05

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

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

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 too high, the pattern becomes unpredictable
BIf the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
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. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

SelectAnswer
ARelative length depends on the frequency of operation
BThe reflector is shorter, and the director is longer
CThey are all the same length
DThe reflector is longer, and the director is shorter

35. - G9D09

What is the primary use of a Beverage antenna?

SelectAnswer
APortable direction finding at higher HF frequencies
BPortable direction finding at lower HF frequencies
CDirectional transmitting for low HF bands
DDirectional receiving for MF and low HF bands