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. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By calculation based on FCC OET Bulletin 65
B	By calculation based on computer modeling
C	All these choices are correct
D	By measurement of field strength using calibrated equipment

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut down the unit if it becomes too hot
B	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
C	To shut off the power supply if too much voltage is produced
D	To ensure that dangerous voltages are removed if the cabinet is opened

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	28.000 MHz to 28.025 MHz
B	All these choices are correct
C	21.275 MHz to 21.300 MHz
D	7.125 MHz to 7.175 MHz

4. - G1B07

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

Select	Answer
A	They are limited to those expressly listed in Part 97 of the FCC rules
B	They may be used if they do not obscure the meaning of a message
C	They are not permitted
D	Only “Q” signals are permitted

5. - G1C01

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

Select	Answer
A	2000 watts PEP output
B	1500 watts PEP output
C	200 watts PEP output
D	1000 watts PEP output

6. - G1D04

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

Select	Answer
A	At least three Volunteer Examiners of General class or higher
B	At least two Volunteer Examiners of General class or higher
C	At least three Volunteer Examiners of Technician class
D	At least two Volunteer Examiners of Technician class or higher

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only during an FCC-declared general state of communications emergency
B	Under no circumstances
C	Only if the 10-meter repeater control operator holds at least a General class license
D	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission

8. - G2A03

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

Select	Answer
A	Suppressed sideband
B	Upper sideband
C	Lower 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. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Are you busy?” or “Is this frequency in use?”
B	“Are you operating full break-in?” or “Can you operate full break-in?”
C	“Will you keep the frequency clear?”
D	“Are you listening only for a specific station?”

11. - G2D06

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

Select	Answer
A	Toward the north
B	Along the gray line
C	180 degrees from the station’s short-path heading
D	Toward the rising sun

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	DSB
B	USB
C	SSB
D	LSB

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It enhances propagation on all HF frequencies
B	None, because only areas on the night side of the Earth are affected
C	It disrupts signals on lower frequencies more than those on higher frequencies
D	It disrupts communications via satellite more than direct communications

14. - G3B06

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

Select	Answer
A	They pass through the ionosphere
B	They are attenuated before reaching the destination
C	They are refracted and trapped in the ionosphere to circle Earth
D	They are refracted back to Earth

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Long path HF propagation at sunrise and sunset
B	Propagation near the MUF
C	Double hop propagation near the LUF
D	Short distance MF or HF propagation at high elevation angles

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	All these choices are correct
B	Increase power transfer from the transmitter to the feed line
C	Reduce the power dissipation in the feedline to the antenna
D	Reduce the SWR in the feed line to the antenna

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It decreases the loading on circuits being measured
B	It allows for higher voltages to be safely measured
C	It improves the frequency response
D	It improves the resolution of the readings

18. - G4C02

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

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

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.178 MHz to 7.181 MHz
B	7.178 MHz to 7.184 MHz
C	7.175 MHz to 7.178 MHz
D	7.1765 MHz to 7.1795 MHz

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Full-wave bridge
B	Bypass
C	Shunt
D	Series-parallel

21. - G5A08

What is impedance?

Select	Answer
A	The ratio of current to voltage
B	The product of current and voltage
C	The ratio of voltage to current
D	The product of current and reactance

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

Select	Answer
A	Approximately 61 watts
B	Approximately 61 milliwatts
C	Approximately 11 milliwatts
D	Approximately 11 watts

23. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

Select	Answer
A	An inductor in parallel
B	A capacitor in parallel
C	A capacitor in series
D	An inductor in series

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	8.5 volts
B	6 volts
C	12 volts
D	10.5 volts

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	Reverse biased
C	Forward biased
D	In the tunnel-effect region

26. - G7A02

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

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

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	AM
B	All these choices are correct
C	FM
D	SSB

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Image and harmonic
B	Cutoff and rolloff
C	Pole and zero
D	Upper and lower half-power

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Vestigial sideband
C	Frequency modulation
D	Single sideband

30. - G8B11

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

Select	Answer
A	The average
B	The sum and difference
C	The ratio
D	The arithmetic product

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is vertical, signal strength is horizontal, time is intensity
B	Frequency is vertical, signal strength is intensity, time is horizontal
C	Frequency is horizontal, signal strength is intensity, time is vertical
D	Frequency is horizontal, signal strength is vertical, time is intensity

32. - G9A05

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

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

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	16 feet
B	33 feet
C	8 feet
D	24 feet

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Larger-diameter elements
B	Tapered-diameter elements
C	Closer element spacing
D	Loading coils in series with the element

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It allows quick selection of vertical or horizontal polarization
B	It allows simultaneous vertical and horizontal polarization
C	It narrows the main lobe in elevation
D	It narrows the main lobe in azimuth