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	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
D	All these choices are correct

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Lead can contaminate food if hands are not washed carefully after handling the solder
B	Tin in the solder can “cold flow,” causing shorts in the circuit
C	RF energy can convert the lead into a poisonous gas
D	High voltages can cause lead-tin solder to disintegrate suddenly

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

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	Transmissions to assist with learning the International Morse code
B	Unidentified test transmissions of less than 10 seconds in duration
C	Regular transmissions offering equipment for sale, if intended for amateur radio use
D	All these choices are correct

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	56 kilobaud
C	1200 baud
D	300 baud

6. - G1D11

What action is required to obtain a new General class license after a previously held license has expired and the two-year grace period has passed?

Select	Answer
A	They must have a letter from the FCC showing they once held an amateur or commercial license
B	There are no requirements other than being able to show a copy of the expired license
C	The applicant must show proof of the appropriate expired license grant and pass the current Element 2 exam
D	Contact the FCC to have the license reinstated

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 1
B	Region 2
C	Region 3
D	Region 4

8. - G2A03

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

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

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan
B	Identify your station by transmitting your call sign at least 3 times
C	Listen on the frequency for at least two minutes to be sure it is clear
D	All these choices are correct

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Send slower
B	Change frequency
C	Increase your power
D	Repeat everything twice

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
B	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
C	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary
D	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary

12. - G2E08

In what segment of the 20-meter band are most digital mode operations commonly found?

Select	Answer
A	Between 14.070 MHz and 14.100 MHz
B	In the middle of the CW segment, near 14.100 MHz
C	At the top of the SSB phone segment, near 14.325 MHz
D	At the bottom of the slow-scan TV segment, near 14.230 MHz

13. - G3A12

What does the K-index measure?

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted back to Earth
B	They are refracted and trapped in the ionosphere to circle Earth
C	They pass through the ionosphere
D	They are amplified by interaction with the ionosphere

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

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

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce the transmitter power when driving a linear amplifier
B	To prevent receiver overload from strong incoming signals
C	To reduce power consumption when operating from batteries
D	To reduce excessive audio level on strong signals

17. - G4B05

Why do voltmeters have high input impedance?

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

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	The ground wire has high impedance on that frequency
B	Flat braid rather than round wire has been used for the ground wire
C	Insulated wire has been used for the ground wire
D	The ground rod is resonant

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. - G4E11

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

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

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Siemens
B	Ohm
C	Ampere
D	Farad

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	12 volts
B	8.5 volts
C	34 volts
D	24 volts

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	120 volts
B	25.5 volts
C	360 volts
D	40 volts

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To decrease plate resistance
B	To reduce grid-to-plate capacitance
C	To increase efficiency
D	To increase the control grid resistance

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A nickel plated version of the PL-259
B	A low noise figure VHF connector
C	A moisture-resistant RF connector useful to 10 GHz
D	A small bayonet connector used for data circuits

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 4
B	Symbol 1
C	Symbol 5
D	Symbol 2

27. - G7B01

What is the purpose of neutralizing an amplifier?

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

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Frequency modulated RF
B	Audio with equalized frequency response
C	Double-sideband modulated RF
D	Audio extracted from the modulation signal

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Phase modulation
B	Multiplex modulation
C	Amplitude modulation
D	Pulse 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 ratio
B	The sum and difference
C	The average
D	The arithmetic product

31. - G8C11

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

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

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	A difference between feed line impedance and antenna feed point impedance
B	Feeding the antenna with unbalanced feed line
C	Using more transmitter power than the antenna can handle
D	Operating an antenna at its resonant frequency

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	21 feet
B	8 feet
C	16 feet
D	11 feet

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Gain increases
B	Front-to-back ratio decreases
C	Resonant frequency is lower
D	Beamwidth increases

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Inverted V
B	Inverted L
C	Lazy H
D	Sloper

Figure G7-1