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	Make sure the antenna is properly shielded
B	Locate the antenna close to your operating position to minimize feed-line radiation
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. - G0B05

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

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

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	The entire band
B	28.000 MHz to 28.025 MHz only
C	28.000 MHz to 28.300 MHz only
D	28.025 MHz to 28.300 MHz only

4. - G1B02

With which of the following conditions must beacon stations comply?

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

5. - G1C01

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

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

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
B	A license from the foreign country and a special remote station permit from the FCC
C	A US operator/primary station license
D	Only an appropriate US operator/primary license and a special remote station permit from the FCC

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 be for other licensed amateurs
C	They must relate to emergencies or disaster relief
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. - G2A03

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

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

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?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Acknowledge the station in distress and determine what assistance may be needed
C	Inform your local emergency coordinator
D	Immediately cease all transmissions

10. - G2C03

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

Select	Answer
A	No US stations should call
B	Operating full break-in
C	Listening only for a specific station or stations
D	Closing station now

11. - G2D09

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

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

12. - G2E07

Which of the following is required when using FT8?

Select	Answer
A	A vertically polarized antenna
B	A special hardware modem
C	Receiver attenuator set to -12 dB
D	Computer time accurate to within approximately 1 second

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	1 to 2 hours
D	28 days

14. - G3B11

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

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

15. - G3C02

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

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

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	More stations can be accommodated within a given signal passband
B	Interference from impulse noise will be eliminated
C	It may be possible to reduce or eliminate interference from other signals
D	Accidental out-of-band operation can be prevented

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An ohmmeter
B	A signal generator
C	An oscilloscope
D	An ammeter

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	High RF voltages on the enclosures of station equipment
B	A ground loop
C	Overheating of ground straps
D	Corrosion of the ground rod

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 14.350 MHz
B	14.344 MHz to 14.347 MHz
C	14.347 MHz to 14.647 MHz
D	14.3455 MHz to 14.3485 MHz

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ensure the battery is placed terminals-up
B	The solar panel must have a charge controller
C	Ground the solar panel outer metal framework
D	A series resistor must be in place

21. - G5A08

What is impedance?

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

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It is the sum of the reciprocal of each individual voltage drop
B	It decreases as more parallel branches are added to the circuit
C	It equals the average of the branch currents
D	It equals the sum of the currents through each branch

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	12 to 1
B	3.5 to 1
C	24 to 1
D	144 to 1

24. - G6A03

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

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

25. - G6B05

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

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

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 1
B	Symbol 7
C	Symbol 2
D	Symbol 11

27. - G7B04

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

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

28. - G7C05

Which of the following is characteristic of a direct digital synthesizer (DDS)?

Select	Answer
A	Extremely narrow tuning range
B	Relatively high-power output
C	Pure sine wave output
D	Variable output frequency with the stability of a crystal oscillator

29. - G8A08

Which of the following is an effect of overmodulation?

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

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 average
C	The ratio
D	The sum and difference

31. - G8C12

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

Select	Answer
A	Viterbi
B	Volumetric
C	Binary
D	Varicode

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 100 feet
B	Decibels per 100 feet
C	Decibels per 1,000 feet
D	Ohms per 1,000 feet

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	42 feet
C	132 feet
D	84 feet

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBi is 2.15 dB lower
B	Gain in dBd is 1.25 dBd higher
C	Gain in dBd is 1.25 dBd lower
D	Gain in dBi is 2.15 dB higher

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying its body capacitance
B	By extending and retracting the whip
C	By varying the base loading inductance
D	By deploying a capacitance hat

Figure G7-1