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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
AA receiver with digital signal processing (DSP) noise reduction
BAn oscilloscope with a high-stability crystal marker generator
CAn SWR meter with a peak-reading function
DA calibrated field strength meter with a calibrated antenna

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

SelectAnswer
AMake sure all circuits that supply power to the tower are locked out and tagged
BNotify the electric company that a person will be working on the tower
CUnground the base of the tower
DAll these choices are correct

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

SelectAnswer
A24900 kHz
B14250 kHz
C21300 kHz
D18155 kHz

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

SelectAnswer
A250 feet
B200 feet
C100 feet
D50 feet

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

SelectAnswer
ARMS output from the transmitter
BRMS input to the antenna
CPEP output from the transmitter
DPEP input to the antenna

6. - G1D07

Volunteer Examiners are accredited by what organization?

SelectAnswer
AA Volunteer Examiner Coordinator
BThe Universal Licensing System
CThe Federal Communications Commission
DThe Wireless Telecommunications Bureau

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

SelectAnswer
A100 watts
B10 watts
C100 milliwatts
D1500 watts

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

SelectAnswer
ALower sideband is more efficient than upper sideband at these frequencies
BIt is commonly accepted amateur practice
CLower sideband is the only sideband legal on these frequency bands
DBecause it is fully compatible with an AM detector

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

SelectAnswer
AInform your local emergency coordinator
BImmediately decrease power to avoid interfering with the station in distress
CAcknowledge the station in distress and determine what assistance may be needed
DImmediately cease all transmissions

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

SelectAnswer
AClosing station now
BNo US stations should call
COperating full break-in
DListening only for a specific station or stations

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

SelectAnswer
AToward the rising sun
BToward the north
C180 degrees from the station’s short-path heading
DAlong the gray line

12. - G2E11

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

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

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

SelectAnswer
AHF communication is improved
BVHF/UHF ducting is disturbed
CVHF/UHF ducting is improved
DHF communication is disturbed

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

SelectAnswer
ACheck the A-index
BUse a network of automated receiving stations on the internet to see where your transmissions are being received
CAll these choices are correct
DSend a series of dots and listen for echoes

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

SelectAnswer
AThe highest frequency which is refracted back to Earth
BThe lowest frequency which is refracted back to Earth
CThe frequency at which the signal-to-noise ratio approaches unity
DThe frequency at which the signal-to-noise ratio is 6 dB

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

SelectAnswer
ATo restrict the transmitter voice bandwidth
BTo reduce interference from carriers in the receiver passband
CTo eliminate receiver interference from impulse noise sources
DTo remove interfering splatter generated by signals on adjacent frequencies

17. - G4B10

Which of the following can be determined with a directional wattmeter?

SelectAnswer
AAntenna front-to-back ratio
BStanding wave ratio
CRF interference
DRadio wave propagation

18. - G4C09

How can the effects of ground loops be minimized?

SelectAnswer
ABond equipment enclosures together
BConnect the AC neutral conductor to the ground wire
CAvoid using lock washers and star washers when making ground connections
DConnect all ground conductors in series

19. - G4D11

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

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

20. - G4E02

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

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

21. - G5A09

What unit is used to measure reactance?

SelectAnswer
ASiemens
BFarad
COhm
DAmpere

22. - G5B04

How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

SelectAnswer
A6 watts
B24 watts
C60 watts
D2.4 watts

23. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

SelectAnswer
AMutual capacitance
BCapacitive coupling
CMutual inductance
DDisplacement current coupling

24. - G6A07

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

SelectAnswer
AThe active region (between cutoff and saturation)
BSaturation and cutoff
CEnhancement and depletion modes
DPeak and valley current points

25. - G6B02

What is meant by the term MMIC?

SelectAnswer
AMetal Monolayer Integrated Circuit
BMonolithic Microwave Integrated Circuit
CMode Modulated Integrated Circuit
DMulti-Mode Integrated Circuit

26. - G7A02

Which of the following components are used in a power supply filter network?

SelectAnswer
AAll these choices are correct
BDiodes
CTransformers and transducers
DCapacitors and inductors

27. - G7B06

What is a shift register?

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

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

SelectAnswer
AFewer digital components are required
BA wide range of filter bandwidths and shapes can be created
CThe DSP filter is much more effective at VHF frequencies
DMixing products are greatly reduced

29. - G8A01

How is direct binary FSK modulation generated?

SelectAnswer
ABy changing an oscillator’s frequency directly with a digital control signal
BBy reconfiguring the CW keying input to act as a tone generator
CBy keying an FM transmitter with a sub-audible tone
DBy using a transceiver’s computer data interface protocol to change frequencies

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

SelectAnswer
AIntercept point
BEven-order
CSecond harmonics
DOdd-order

31. - G8C14

Which of the following describes a waterfall display?

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

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

SelectAnswer
AThe distance between the centers of the conductors and the length of the line
BThe radius of the conductors and the frequency of the signal
CThe distance between the centers of the conductors and the radius of the conductors
DThe frequency of the signal and the length of the 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
AAntenna height has no effect on the pattern
BIf the antenna is too high, the pattern becomes unpredictable
CIf the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
DIf the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

SelectAnswer
AGain increases
BResonant frequency is lower
CBeamwidth increases
DFront-to-back ratio decreases

35. - G9D09

What is the primary use of a Beverage antenna?

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