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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Locate the antenna close to your operating position to minimize feed-line radiation
B	Make sure the antenna is properly shielded
C	Position the antenna along the edge of a wall to reduce parasitic radiation
D	Make sure that MPE limits are not exceeded in occupied areas

2. - G0B11

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

Select	Answer
A	They must be bonded to all buried water and gas lines
B	Bends in ground wires must be made as close as possible to a right angle
C	They must be bonded together with all other grounds
D	Lightning grounds must be connected to all ungrounded wiring

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	12 meters
B	17 meters
C	160 meters
D	30 meters

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	All these choices are correct
B	Automatic identification of repeaters
C	Observation of propagation and reception
D	Transmission of bulletins of general interest to amateur radio licensees

5. - G1C11

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

Select	Answer
A	RMS output from the transmitter
B	RMS input to the antenna
C	PEP input to the antenna
D	PEP output from the transmitter

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	Whenever they operate using General class frequency privileges
B	Whenever they operate on any amateur frequency
C	Whenever they operate using Technician frequency privileges
D	A special identifier is not required if their General class license application has been filed with the FCC

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	These frequencies are set aside for emergency operations
B	These frequencies are set aside for bulletins from the FCC
C	A system of propagation beacon stations operates on those frequencies
D	A system of automatic digital stations operates on those frequencies

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband is transmitted; the other sideband and carrier are suppressed
B	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
C	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
D	Only one sideband and the carrier are transmitted; the other sideband is suppressed

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Only a person holding an FCC-issued amateur operator license
B	Only a RACES net control operator
C	Any control operator when normal communication systems are operational
D	A person holding an FCC-issued amateur operator license or an appropriate government official

10. - G2C04

What does the Q signal “QRL?” mean?

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

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Send a QSL card to the stations worked, or QSL via Logbook of The World
B	Identify your station according to normal FCC regulations
C	All these choices are correct
D	Submit a log to the contest sponsor

12. - G2E13

What is another name for a Winlink Remote Message Server?

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

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	20 to 40 hours
C	28 days
D	1 to 2 hours

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	HF communications over the path are enhanced
B	Propagation over the path on all HF frequencies is enhanced
C	Propagation via ordinary skywave communications is not possible over that path
D	Double-hop propagation along the path is more common

15. - G3C02

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

Select	Answer
A	The lowest frequency which is refracted back to Earth
B	The frequency at which the signal-to-noise ratio approaches unity
C	The highest frequency which is refracted back to Earth
D	The frequency at which the signal-to-noise ratio is 6 dB

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
B	To allow time for the amplifier power supply to reach operating level
C	To prevent transient overmodulation
D	To prevent key clicks on CW

17. - G4B10

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

Select	Answer
A	Radio wave propagation
B	Antenna front-to-back ratio
C	RF interference
D	Standing wave ratio

18. - G4C02

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

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

19. - G4D02

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

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

20. - G4E02

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

Select	Answer
A	To reduce RF voltage discharge from the tip of the antenna while transmitting
B	To narrow the operating bandwidth of the antenna
C	To increase the “Q” of the antenna
D	To reduce the chance of damage if the antenna should strike an object

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Admittance
B	Reactance
C	Reluctance
D	Conductance

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 11 milliwatts
B	Approximately 61 watts
C	Approximately 61 milliwatts
D	Approximately 11 watts

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

Select	Answer
A	7 millihenries
B	1,000 millihenries
C	14.3 millihenries
D	70 millihenries

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

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

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	Programmable Logic
C	MMIC
D	Digital

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	360 degrees
B	270 degrees
C	180 degrees
D	90 degrees

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	100%
B	50%
C	More than 50% but less than 100%
D	Less than 50%

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	IF amplifier
B	Carrier oscillator
C	RF amplifier
D	Filter

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	Its encoding provides error correction
B	Its bandwidth is approximately the same as BPSK31
C	It is sideband sensitive
D	All these choices are correct

30. - G8B11

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

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

31. - G8C11

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

Select	Answer
A	Dot and dash
B	High and low
C	On and off
D	Mark and space

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	2:1
B	1:2
C	5:1
D	1:5

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a figure-eight at right angles to the antenna
B	It has a pair of lobes on one side of the antenna and a single lobe on the other side
C	It is a figure-eight off both ends of the antenna
D	It is a circle (equal radiation in all directions)

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The direction of maximum radiated field strength from the antenna
B	The point of maximum current in a radiating antenna element
C	The maximum voltage standing wave point on a radiating element
D	The magnitude of the maximum vertical angle of radiation

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	On the same side as the feed point
B	Omnidirectional in the plane of the halo
C	Broadside to the plane of the halo
D	Opposite the feed point