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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	Its frequency
C	Its power density
D	All these choices are correct

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Overvoltage on the hot wires
B	Current flowing from one or more of the hot wires directly to ground
C	All these choices are correct
D	Current flowing from one or more of the hot wires to the neutral wire

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	60 meters, 30 meters, 17 meters, and 12 meters
B	All HF bands
C	All HF bands except 160 meters and 10 meters
D	80 meters, 40 meters, 20 meters, and 15 meters

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	All these choices are correct
B	No more than one beacon station may transmit in the same band from the same station location
C	The frequency must be posted on the internet or published in a national periodical
D	The frequency must be coordinated with the National Beacon Organization

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
B	Type-certify equipment to FCC standards
C	Obtain an experimental license from the FCC
D	Publicly document the technical characteristics of the protocol

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must hold an FCC granted amateur radio license of General class or above
B	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
C	The person must be a resident of the US for a minimum of 5 years
D	The person’s home citizenship must be in ITU region 2

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
B	They must relate to emergencies or disaster relief
C	They must be for other licensed amateurs
D	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log

8. - G2A01

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

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

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	QSOs in progress have priority
B	Except during emergencies, no amateur station has priority access to any frequency
C	Contest operations should yield to non-contest use of frequencies
D	Nets have priority

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Send more slowly
B	I am troubled by static
C	Stop sending
D	Zero beat my signal

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
B	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
C	Amateur volunteers who conduct amateur licensing examinations
D	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	CW
B	DSB
C	USB
D	LSB

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

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Minimum Usable Frequency during a 24-hour period
B	The Maximum Usable Frequency for communications between two points
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 it is the highest
C	Because it is the densest
D	Because of temperature inversions

16. - G4A08

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

Select	Answer
A	Minimum SWR on the antenna
B	Minimum plate current without exceeding maximum allowable grid current
C	Desired power output without exceeding maximum allowable plate current
D	Highest plate voltage while minimizing grid current

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Better for measuring computer circuits
B	Higher precision
C	Less prone to overload
D	Faster response

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	Solder flux will prevent a low conductivity connection
B	A soldered joint will likely be destroyed by the heat of a lightning strike
C	Solder has too high a dielectric constant to provide adequate lightning protection
D	All these choices are correct

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It reduces harmonic distortion
B	It increases peak power
C	It reduces intermodulation distortion
D	It increases average power

20. - G4E06

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

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

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Resonance causes impedance to be very low
B	Impedance is equal to the geometric mean of the inductance and capacitance
C	Resonance causes impedance to be very high
D	Impedance is equal to the arithmetic mean of the inductance and capacitance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	20.6 percent
B	12.2 percent
C	10.9 percent
D	25.9 percent

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	70 microfarads
B	14.3 microfarads
C	0.07 microfarads
D	1,000 microfarads

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	High stability
C	Comparatively low cost
D	High capacitance for given volume

25. - G6B05

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

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

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Fewer circuit components are required
B	High-frequency operation allows the use of smaller components
C	Inherently more stable
D	Faster switching time makes higher output voltage possible

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To eliminate self-oscillations
B	To limit the modulation index
C	To keep the carrier on frequency
D	To cut off the final amplifier during standby periods

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in test gear to detect spurious mixing products
B	Used in an FM receiver to filter out unwanted sidebands
C	Used in a single sideband receiver to extract the modulated signal
D	Used in transmitter to perform frequency multiplication

29. - G8A02

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

Select	Answer
A	Phase transformation
B	Phase modulation
C	Phase inversion
D	Phase convolution

30. - G8B11

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

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

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Binary
C	Viterbi
D	Varicode

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	1:4
B	4:1
C	2:1
D	1:2

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 decreases
C	It steadily increases
D	It peaks at about 1/8 wavelength above ground

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 9 dB higher
B	Approximately 6 dB higher
C	Approximately 1.5 dB higher
D	Approximately 3 dB higher

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