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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. - G0B11

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

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

3. - G1A02

On which of the following bands is phone operation prohibited?

SelectAnswer
A30 meters
B17 meters
C160 meters
D12 meters

4. - G1B02

With which of the following conditions must beacon stations comply?

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

5. - G1C06

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

SelectAnswer
A1000 watts PEP output
B1200 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
AAmateur Extra, General, and Technician
BNone, only Amateur Extra class licensees may be accredited
CGeneral and Technician
DTechnician only

7. - G1E12

When may third-party messages be transmitted via remote control?

SelectAnswer
AUnder no circumstances except for emergencies
BOnly when the message is intended for licensed radio amateurs
COnly when the message is intended for third parties in areas where licensing is controlled by the FCC
DUnder any circumstances in which third party messages are permitted by FCC rules

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

SelectAnswer
ATransmit audio or microphone gain
BAntenna inductance or capacitance
CRF clipping level
DAttenuator level

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
B5 Hz to 50 Hz
C3 kHz to 6 kHz
D1 kHz to 3 kHz

10. - G2C02

What should you do if a CW station sends “QRS?”

SelectAnswer
AIncrease your power
BRepeat everything twice
CChange frequency
DSend slower

11. - G2D10

What is QRP operation?

SelectAnswer
ATraffic relay procedure net operation
BTransmission using Quick Response Protocol
CLow-power transmit operation
DRemote piloted model control

12. - G2E15

Which of the following is a common location for FT8?

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

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

SelectAnswer
A20 to 40 hours
B1 to 2 hours
C8 minutes
D28 days

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

SelectAnswer
AThey are refracted back to Earth
BThey are refracted and trapped in the ionosphere to circle Earth
CThey pass through the ionosphere
DThey are amplified by interaction with 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 E region is unstable during daylight hours
DThe F 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 allow time for the amplifier power supply to reach operating level
BTo prevent key clicks on CW
CTo prevent transient overmodulation
DTo allow time for the amplifier to switch the antenna between the transceiver and the amplifier output

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

SelectAnswer
AAn ammeter
BA signal generator
CAn oscilloscope
DAn ohmmeter

18. - G4C04

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

SelectAnswer
AA chirpy CW signal
BOn-and-off humming or clicking
CSeverely distorted audio
DA CW signal at a nearly pure audio frequency

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

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

SelectAnswer
ATo increase the “Q” of the antenna
BTo reduce the chance of damage if the antenna should strike an object
CTo narrow the operating bandwidth of the antenna
DTo reduce RF voltage discharge from the tip of the antenna while transmitting

21. - G5A11

What letter is used to represent reactance?

SelectAnswer
AX
BZ
CY
DB

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

SelectAnswer
AThe peak-to-peak value
BThe reciprocal of the RMS value
CThe peak value
DThe RMS value

23. - G5C07

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

SelectAnswer
A12 to 1
B24 to 1
C144 to 1
D3.5 to 1

24. - G6A02

What is an advantage of batteries with low internal resistance?

SelectAnswer
AHigh voltage
BRapid recharge
CLong life
DHigh discharge current

25. - G6B03

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

SelectAnswer
AHigh power handling capability
BBetter suited for RF amplification
CBetter suited for power supply regulation
DLow power consumption

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

SelectAnswer
AA sine wave at half the frequency of the AC input
BA series of DC pulses at twice the frequency of the AC input
CA series of DC pulses at the same frequency as the AC input
DA steady DC voltage

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

SelectAnswer
AClass AB
BClass A
CClass B
DClass C

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

SelectAnswer
AAll types of modulation can be created with appropriate processing
BMinimum detectible signal level is reduced
CThe need for high resolution analog-to-digital converters is eliminated
DAutomatic conversion of the signal from digital to analog

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

SelectAnswer
APhase transformation
BPhase modulation
CPhase convolution
DPhase inversion

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

SelectAnswer
AThe average
BThe arithmetic product
CThe ratio
DThe sum and difference

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

SelectAnswer
AOn and off
BDot and dash
CMark and space
DHigh and low

32. - G9A04

What causes reflected power at an antenna’s feed point?

SelectAnswer
AA difference between feed line impedance and antenna feed point impedance
BFeeding the antenna with unbalanced feed line
CUsing more transmitter power than the antenna can handle
DOperating an antenna at its resonant frequency

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

SelectAnswer
AIt is more effective on the lower HF bands than on the higher bands
BStation equipment may carry significant RF current
CIt must be longer than 1 wavelength
DIt produces only vertically polarized radiation

34. - G9C07

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

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

35. - G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

SelectAnswer
AElectrically small loops are omnidirectional
BBroadside and in the plane of the loop
CIn the plane of the loop
DBroadside to the loop