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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Change to a non-polarized antenna with higher gain
B	Use an antenna with a higher front-to-back ratio
C	All these choices are correct
D	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Electrical safety of the station
B	Acceptable bandwidth limits
C	RF exposure limits of the human body
D	Acceptable modulation limits

3. - G1A08

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

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

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	On any frequency if transmissions are in Morse code
B	On any frequency if power is less than 1 watt
C	21.08 MHz to 21.09 MHz
D	28.20 MHz to 28.30 MHz

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Only those of the remote station’s country
B	Those of the remote station’s country and the FCC’s third-party regulations
C	Only those of the FCC
D	Those of both the remote station’s country and the FCC

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party is speaking in a language other than English
B	The third party is not a US citizen
C	All these choices are correct
D	The third party’s amateur license has been revoked and not reinstated

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Frequency modulation
B	Double sideband
C	Single sideband
D	Single phase modulation

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Switch to the opposite sideband
B	Decrease power and continue to transmit
C	Advise the interfering stations that you are on the frequency and that you have priority
D	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner

10. - G2C04

What does the Q signal “QRL?” mean?

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

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 conduct amateur licensing examinations
C	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

12. - G2E02

What is VARA?

Select	Answer
A	A low signal-to-noise digital mode used for EME (moonbounce)
B	A radio direction finding system used on VHF and UHF
C	A digital protocol used with Winlink
D	A DX spotting system using a network of software defined radios

13. - G3A13

What does the A-index measure?

Select	Answer
A	The long-term stability of Earth’s geomagnetic field
B	The amount of polarization of the Sun’s electric field
C	The relative position of sunspots on the surface of the Sun
D	The solar radio flux at Boulder, Colorado

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just below the critical frequency
B	Just above the LUF
C	Just below the MUF
D	Just above the critical frequency

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Phone signals have high intelligibility
B	Signals have a fluttering sound
C	There are very large, sudden swings in signal strength
D	Scatter propagation occurs only at night

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By temporarily increasing received bandwidth
B	By reducing receiver gain during a noise pulse
C	By redirecting noise pulses into a filter capacitor
D	By clipping noise peaks

17. - G4B01

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

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

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	Lack of rectification of the transmitter’s signal in power conductors
C	Using a balun to feed an unbalanced antenna
D	Arcing at a poor electrical connection

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz below the edge of the segment
B	At least 3 kHz above the edge of the segment
C	At least 1 kHz below the edge of the segment
D	At least 1 kHz above the edge of the segment

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To reduce radiation resistance
B	To increase the power handling capacity of a whip antenna
C	To lower the radiation angle
D	To electrically lengthen a physically short antenna

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Reluctance
B	Admittance
C	Susceptance
D	Conductance

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 2 dB
B	Approximately 9 dB
C	Approximately 6 dB
D	Approximately 3 dB

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	14.3 millihenries
B	70 millihenries
C	7 millihenries
D	1,000 millihenries

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	12 volts
C	6 volts
D	10.5 volts

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	4 GHz
B	500 MHz
C	50 MHz
D	40 GHz

26. - G7A05

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

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

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

Select	Answer
A	A circulator and a filter operating in a feed-forward loop
B	A frequency multiplier and a mixer
C	An amplifier and a divider
D	A filter and an amplifier operating in a feedback loop

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Modulation
B	Filtering
C	Detection
D	All these choices are correct

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Frequency modulation
B	Phase modulation
C	Amplitude modulation
D	Power modulation

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 sum and difference
D	The ratio

31. - G8C09

Which is true of mesh network microwave nodes?

Select	Answer
A	Having more nodes increases signal strengths
B	If one node fails, a packet may still reach its target station via an alternate node
C	Links between two nodes in a network may have different frequencies and bandwidths
D	More nodes reduce overall microwave out of band interference

32. - G9A06

In what units is RF feed line loss usually expressed?

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

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	As high as possible above the ground
B	Parallel to the antenna element
C	On the surface or buried a few inches below the ground
D	At the center of the antenna

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	3/4 wavelength
B	1/4 wavelength
C	1/2 wavelength
D	1 wavelength

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Directional transmitting for low HF bands
B	Portable direction finding at higher HF frequencies
C	Directional receiving for MF and low HF bands
D	Portable direction finding at lower HF frequencies