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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
BAn oscilloscope with a high-stability crystal marker generator
CA receiver with digital signal processing (DSP) noise reduction
DA calibrated field strength meter with a calibrated antenna

2. - G0B10

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

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

3. - G1A01

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

SelectAnswer
A80 meters, 20 meters, 15 meters, and 10 meters
B160 meters, 60 meters, 15 meters, and 12 meters
C60 meters, 30 meters, 17 meters, and 12 meters
D80 meters, 40 meters, 20 meters, and 15 meters

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
COnly “Q” signals are permitted
DThey are limited to those expressly listed in Part 97 of the FCC rules

5. - G1C06

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

SelectAnswer
A200 watts PEP output
B1000 watts PEP output
C1200 watts PEP output
D1500 watts PEP output

6. - G1D04

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

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

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

SelectAnswer
AAll these choices are correct
BWhen a station is transmitting spread spectrum emissions
CWhen operating within one mile of an FCC Monitoring Station
DWhen using a band where the Amateur Service is secondary

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

SelectAnswer
AUpper sideband
BDouble sideband
CLower sideband
DSuppressed sideband

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

SelectAnswer
A2 kHz to 3 kHz
B5 Hz to 50 Hz
CApproximately 6 kHz
D150 Hz to 500 Hz

10. - G2C11

What does the Q signal “QRV” mean?

SelectAnswer
AYou are sending too fast
BI am ready to receive
CThere is interference on the frequency
DI am quitting for the day

11. - G2D01

What is the Volunteer Monitor Program?

SelectAnswer
AAmateur volunteers who are formally enlisted to monitor the airwaves for rules violations
BAmateur volunteers who conduct amateur licensing examinations
CAmateur volunteers who conduct frequency coordination for amateur VHF repeaters
DAmateur volunteers who use their station equipment to help civil defense organizations in times of emergency

12. - G2E15

Which of the following is a common location for FT8?

SelectAnswer
AApproximately 14.074 MHz to 14.077 MHz
BApproximately 14.110 MHz to 14.113 MHz
CAnywhere in the voice portion of the band
DAnywhere in the CW portion of the band

13. - G3A05

What is the solar flux index?

SelectAnswer
AAnother name for the American sunspot number
BA measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
CA measure of solar radiation with a wavelength of 10.7 centimeters
DA count of sunspots that is adjusted for solar emissions

14. - G3B06

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

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

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

SelectAnswer
APropagation near the MUF
BShort distance MF or HF propagation at high elevation angles
CDouble hop propagation near the LUF
DLong path HF propagation at sunrise and sunset

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 transmitter balanced mixer output
DThe attenuated RF output of the transmitter

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

SelectAnswer
AIt ensures that hazardous voltages cannot appear on the chassis
BIt prevents signal overload
CIt prevents a blown fuse in the event of an internal short circuit
DIt ensures that the neutral wire is grounded

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

SelectAnswer
A14.347 MHz to 14.350 MHz
B14.3455 MHz to 14.3485 MHz
C14.344 MHz to 14.347 MHz
D14.347 MHz to 14.647 MHz

20. - G4E05

Which of the following most limits an HF mobile installation?

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

21. - G5A09

What unit is used to measure reactance?

SelectAnswer
AFarad
BOhm
CAmpere
DSiemens

22. - G5B09

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

SelectAnswer
A12 volts
B24 volts
C34 volts
D8.5 volts

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

SelectAnswer
A3.3 millihenries
B0.30 henries
C30 millihenries
D3.3 henries

24. - G6A12

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

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

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

SelectAnswer
AMost of the magnetic field is contained in the core
BAll these choices are correct
CThe magnetic properties of the core may be optimized for a specific range of frequencies
DLarge values of inductance may be obtained

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
BThe output voltage is two times the peak input voltage
COnly one diode is required
DThe ripple frequency is twice that of a full-wave rectifier

27. - G7B10

Which of the following describes a linear amplifier?

SelectAnswer
AA Class C high efficiency amplifier
BAn amplifier in which the output preserves the input waveform
CAny RF power amplifier used in conjunction with an amateur transceiver
DAn amplifier used as a frequency multiplier

28. - G7C12

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

SelectAnswer
ACutoff frequency
BNeper frequency
CNotch frequency
DRolloff frequency

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

SelectAnswer
AThe transmitter’s automatic level control (ALC) is properly adjusted
BThe transmitter’s carrier is properly suppressed
CSignal distortion caused by insufficient collector current
DSignal distortion caused by excessive drive or speech levels

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

SelectAnswer
ATo prevent overmodulation
BTo aid in tuning your transmitter
CSome modes have high duty cycles that could exceed the transmitter’s average power rating
DTo allow time for the other station to break in during a transmission

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

SelectAnswer
A902 MHz
B2.4 GHz
C432 MHz
D10.7 GHz

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

SelectAnswer
A50 ohms
B75 ohms
C100 ohms
D450 ohms

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. - G9C11

What is a beta or hairpin match?

SelectAnswer
AA section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
BA series capacitor selected to cancel the inductive reactance of a folded dipole antenna
CA shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
DA 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

SelectAnswer
AThey have poor harmonic rejection
BThey must be fed with open wire line
CThey must be used with an antenna tuner
DThey present low impedance on all design frequencies