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

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	As close to the station equipment as possible
B	Outside the building
C	Next to the closest power pole
D	Parallel to the water supply line

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	12 meters
C	30 meters
D	20 meters

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	100 feet
B	250 feet
C	200 feet
D	50 feet

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

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

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least two Volunteer Examiners of General class or higher
B	At least three Volunteer Examiners of General class or higher
C	At least three Volunteer Examiners of Technician class
D	At least two Volunteer Examiners of Technician class or higher

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	1500 watts
B	100 milliwatts
C	10 watts
D	100 watts

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Transmit audio or microphone gain
B	RF clipping level
C	Attenuator level
D	Antenna inductance or capacitance

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

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	KN
B	BK
C	AR
D	SK

11. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare signal strengths between the input and output of the repeater
B	All these choices are correct
C	Compare vertical and horizontal signal strengths on the input frequency
D	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors

12. - G2E13

What is another name for a Winlink Remote Message Server?

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

13. - G3A12

What does the K-index measure?

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

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Send a series of dots and listen for echoes
B	Use a network of automated receiving stations on the internet to see where your transmissions are being received
C	All these choices are correct
D	Check the A-index

15. - G3C06

What is a characteristic of HF scatter?

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

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Increase power transfer from the transmitter to the feed line
B	Reduce the SWR in the feed line to the antenna
C	All these choices are correct
D	Reduce the power dissipation in the feedline to the antenna

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	Faster response
C	Less prone to overload
D	Higher precision

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	Severely distorted audio
B	A CW signal at a nearly pure audio frequency
C	A chirpy CW signal
D	On-and-off humming or clicking

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 2 times
B	Approximately 4 times
C	Approximately 1.5 times
D	Approximately 8 times

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	Ensure the battery is placed terminals-up
D	The solar panel must have a charge controller

21. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of direct current caused by resistance
B	Reinforcement of the flow of direct current caused by resistance
C	Opposition to the flow of alternating current caused by capacitance or inductance
D	Reinforcement of the flow of alternating current caused by capacitance or inductance

22. - G5B02

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

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

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	3,583 picofarads
B	576.9 nanofarads
C	1,733 picofarads
D	10.750 nanofarads

24. - G6A03

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

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

25. - G6B11

What is an SMA connector?

Select	Answer
A	A small threaded connector suitable for signals up to several GHz
B	A type of push-on connector intended for high-voltage applications
C	A type-S to type-M adaptor
D	A connector designed for serial multiple access signals

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A steady DC voltage
B	A series of DC pulses at the same frequency as the AC input
C	A series of DC pulses at twice the frequency of the AC input
D	A sine wave at half the frequency of the AC input

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 filter and an amplifier operating in a feedback loop
C	A frequency multiplier and a mixer
D	An amplifier and a divider

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Insertion loss
B	Q
C	Ultimate rejection
D	Return loss

29. - G8A05

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

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

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Detection
B	Heterodyning
C	Intermodulation
D	Rolloff

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	10.7 GHz
B	902 MHz
C	2.4 GHz
D	432 MHz

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The frequency of the signal and the length of the line
C	The radius of the conductors and the frequency of the signal
D	The distance between the centers of the conductors and the length of the line

33. - G9B06

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

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

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 3 dB higher
D	Approximately 1.5 dB higher

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Very high
B	Approximately 300 ohms
C	Approximately 50 ohms
D	Very low