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

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

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1. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	A higher duty cycle permits greater power levels to be transmitted
B	A lower duty cycle permits greater power levels to be transmitted
C	High duty cycle transmitters are exempt from RF exposure requirements
D	Low duty cycle transmitters are exempt from RF exposure evaluation requirements

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	As close to the station equipment as possible
B	Parallel to the water supply line
C	Outside the building
D	Next to the closest power pole

3. - G1A09

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

Select	Answer
A	21300 kHz
B	24900 kHz
C	18155 kHz
D	14250 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?

Select	Answer
A	200 feet
B	50 feet
C	100 feet
D	250 feet

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	1200 baud
B	56 kilobaud
C	300 baud
D	19.6 kilobaud

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	On any General or Technician class band segment except 30 meters and 60 meters
B	On any General or Technician class band segment
C	Only on the Technician band segments until you have a receipt for the FCC application fee payment
D	Only the Technician band segments until your upgrade is posted in the FCC database

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 2
B	Region 4
C	Region 3
D	Region 1

8. - G2A03

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

Select	Answer
A	Upper sideband
B	Lower sideband
C	Suppressed sideband
D	Double sideband

9. - G2B11

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

Select	Answer
A	No more than 2 hours per month
B	No more than 1 hour per week
C	No more than 2 hours per week
D	No more than 1 hour per month

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	I have received and understood
B	We have already confirmed the contact
C	We have worked before
D	Send slower

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	America, Boston, Canada, Denmark
B	Adam, Boy, Charles, David
C	Able, Baker, Charlie, Dog
D	Alpha, Bravo, Charlie, Delta

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	RJ-45
B	Gateway
C	Terminal Node Controller
D	Printer/Server

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?

Select	Answer
A	8 minutes
B	28 days
C	20 to 40 hours
D	1 to 2 hours

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency for communications between two points
B	The Minimum Usable Frequency during a 24-hour period
C	The Maximum Usable Frequency during a 24-hour period
D	The Minimum Usable Frequency for communications between two points

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of the Doppler effect
B	Because of temperature inversions
C	Because it is the highest
D	Because it is the densest

16. - G4A01

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

Select	Answer
A	To eliminate receiver interference from impulse noise sources
B	To reduce interference from carriers in the receiver passband
C	To restrict the transmitter voice bandwidth
D	To remove interfering splatter generated by signals on adjacent frequencies

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	An oscilloscope uses less power
B	Greater precision
C	Complex impedances can be easily measured
D	Complex waveforms can be measured

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Lack of rectification of the transmitter’s signal in power conductors
B	Arcing at a poor electrical connection
C	Using a balun to feed an unbalanced antenna
D	Not using a balun or line isolator to feed balanced antennas

19. - G4D09

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

Select	Answer
A	14.347 MHz to 14.647 MHz
B	14.347 MHz to 14.350 MHz
C	14.3455 MHz to 14.3485 MHz
D	14.344 MHz to 14.347 MHz

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Q of the antenna will be very low
B	Harmonic radiation may increase
C	Short antennas are more likely to cause distortion of transmitted signals
D	Operating bandwidth may be very limited

21. - G5A02

What is reactance?

Select	Answer
A	Reinforcement of the flow of alternating current caused by capacitance or inductance
B	Opposition to the flow of alternating current caused by capacitance or inductance
C	Reinforcement of the flow of direct current caused by resistance
D	Opposition to the flow of direct current caused by resistance

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	625 watts
B	5000 watts
C	2500 watts
D	8.75 watts

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	25.5 volts
B	120 volts
C	360 volts
D	40 volts

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	0.1 volt
B	0.7 volts
C	1.0 volts
D	0.3 volts

25. - G6B05

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

Select	Answer
A	Large values of inductance may be obtained
B	The magnetic properties of the core may be optimized for a specific range of frequencies
C	All these choices are correct
D	Most of the magnetic field is contained in the core

26. - G7A02

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

Select	Answer
A	All these choices are correct
B	Diodes
C	Capacitors and inductors
D	Transformers and transducers

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	8
B	16
C	3
D	6

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Audio extracted from the modulation signal
B	Audio with equalized frequency response
C	Double-sideband modulated RF
D	Frequency modulated RF

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Excessive bandwidth
B	Insufficient bandwidth
C	Insufficient audio
D	Frequency drift

30. - G8B03

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

Select	Answer
A	Synthesizing
B	Frequency inversion
C	Heterodyning
D	Phase inversion

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	Winlink, PACTOR II, and PACTOR III
B	DMR, D-STAR, and SystemFusion
C	WSPR, MFSK16, and EasyPAL
D	FT8, FT4, and FST4

32. - G9A05

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

Select	Answer
A	Attenuation follows Marconi’s Law of Attenuation
B	Attenuation is independent of frequency
C	Attenuation increases
D	Attenuation decreases

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?

Select	Answer
A	It is unaffected by the height above ground
B	It steadily increases
C	It peaks at about 1/8 wavelength above ground
D	It steadily decreases

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The physical length of the boom
B	The spacing of each element along the boom
C	All these choices are correct
D	The number of elements on the boom

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Inverted L
B	Inverted V
C	Sloper
D	Lazy H