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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An SWR meter with a peak-reading function
B	A calibrated field strength meter with a calibrated antenna
C	A receiver with digital signal processing (DSP) noise reduction
D	An oscilloscope with a high-stability crystal marker generator

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	Parallel to the water supply line
C	Next to the closest power pole
D	Outside the building

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The portion between 28.3 MHz and 28.5 MHz
B	The entire band
C	The portion between 28.1 MHz and 28.2 MHz
D	The portion above 29.5 MHz

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	10 watts PEP output
B	20 watts PEP output
C	200 watts PEP output
D	100 watts PEP output

5. - G1C11

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

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

6. - G1D04

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

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

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When under automatic control
B	When messages are not encrypted
C	When messages are encrypted
D	Under no circumstances

8. - G2A03

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

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

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	You are sending too fast
B	I am quitting for the day
C	There is interference on the frequency
D	I am ready to receive

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
B	A map that shows accurate land masses
C	A map that shows true bearings and distances from a specific location
D	A map that shows the angle at which an amateur satellite crosses the equator

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide high-speed data services during an emergency or community event
B	To provide real time propagation data by monitoring amateur radio transmissions worldwide
C	To provide FM repeater coverage in remote areas
D	To provide DX spotting reports to aid contesters and DXers

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	VHF/UHF ducting is improved
B	HF communication is improved
C	VHF/UHF ducting is disturbed
D	HF communication is disturbed

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are refracted and trapped in the ionosphere to circle Earth
B	They are attenuated before reaching the destination
C	They pass through the ionosphere
D	They are refracted back to Earth

15. - G3C06

What is a characteristic of HF scatter?

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

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To prevent excessive drive
B	To reduce harmonic radiation
C	To balance the transmitter audio frequency response
D	To increase overall efficiency

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Less prone to overload
B	Faster response
C	Better for measuring computer circuits
D	Higher precision

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	Arcing at a poor electrical connection
D	Using a balun to feed an unbalanced antenna

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times more powerful
B	It is 10 times less powerful
C	It is 100 times more powerful
D	It is 20 times less powerful

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Q of the antenna will be very low
B	Harmonic radiation may increase
C	Short antennas are more likely to cause distortion of transmitted signals
D	Operating bandwidth may be very limited

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A transformer
B	All these choices are correct
C	A length of transmission line
D	A Pi-network

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The RMS value
B	The peak-to-peak value
C	The peak value
D	The reciprocal of the RMS value

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

24. - G6A03

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

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

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	Programmable Logic
C	Digital
D	MMIC

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Inherently more stable
B	High-frequency operation allows the use of smaller components
C	Fewer circuit components are required
D	Faster switching time makes higher output voltage possible

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is low only when both inputs are high
B	Output is high when either or both inputs are low
C	Output is low when either or both inputs are high
D	Output is high only when both inputs are high

28. - G7C05

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

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

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By changing an oscillator’s frequency directly with a digital control signal
B	By using a transceiver’s computer data interface protocol to change frequencies
C	By keying an FM transmitter with a sub-audible tone
D	By reconfiguring the CW keying input to act as a tone generator

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	8 kHz
B	16 kHz
C	3 kHz
D	5 kHz

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using error detection and correction
B	A 7-bit code with start, stop, and parity bits
C	A code using SELCAL and LISTEN
D	A 5-bit code with additional start and stop bits

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 distance between the centers of the conductors and the length of the line
C	The radius of the conductors and the frequency of the signal
D	The frequency of the signal and the length of the line

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	16 feet
B	33 feet
C	8 feet
D	24 feet

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	They are all the same length
B	The reflector is shorter, and the director is longer
C	The reflector is longer, and the director is shorter
D	Relative length depends on the frequency of operation

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To provide balanced feed point impedance
B	To enable multiband operation
C	To notch spurious frequencies
D	To prevent out-of-band operation