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

2. - G0B10

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

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

3. - G1A08

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

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

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the foreign country has a formal third-party agreement filed with the FCC
B	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
C	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country
D	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country

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	2000 watts PEP output
C	1000 watts PEP output
D	1500 watts PEP output

6. - G1D04

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

Select	Answer
A	At least three Volunteer Examiners of Technician class
B	At least three Volunteer Examiners of General class or higher
C	At least two Volunteer Examiners of Technician class or higher
D	At least two Volunteer Examiners of General 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 messages are not encrypted
B	When under automatic control
C	Under no circumstances
D	When messages are encrypted

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Double sideband
B	Upper sideband
C	Suppressed 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. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 5 wpm
B	The fastest speed at which you are comfortable copying, but no slower than the CQ
C	The fastest speed at which you are comfortable copying, but no faster than the CQ
D	At the standard calling speed of 10 wpm

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Toward the north
B	Toward the rising sun
C	180 degrees from the station’s short-path heading
D	Along the gray line

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	USB
B	SSB
C	LSB
D	DSB

13. - G3A08

How can a geomagnetic storm affect HF propagation?

Select	Answer
A	Improve high-latitude HF propagation
B	Degrade high-latitude HF propagation
C	Improve ground wave propagation
D	Degrade ground wave propagation

14. - G3B03

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

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

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

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

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	CW signals may become severely attenuated
B	Received signals may become distorted
C	Received frequency may become unstable
D	Received frequency may shift several kHz

17. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	RF interference
B	Antenna front-to-back ratio
C	Standing wave ratio
D	Radio wave propagation

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Connect the center conductor to the shield of all cables to short circuit the RFI signal
B	Ground the center conductor of the audio cable causing the interference
C	Add an additional insulating jacket to the cable
D	Place a ferrite choke on the cable

19. - G4D11

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

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

20. - G4E11

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

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

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	Resistance is cancelled
B	Inductive reactance and capacitive reactance cancel
C	Current and voltage are equal
D	The circuit radiates all its energy in the form of radio waves

22. - G5B01

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

Select	Answer
A	Approximately 2 dB
B	Approximately 3 dB
C	Approximately 6 dB
D	Approximately 9 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	1,000 millihenries
B	14.3 millihenries
C	70 millihenries
D	7 millihenries

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	Peak and valley current points
B	Enhancement and depletion modes
C	The active region (between cutoff and saturation)
D	Saturation and cutoff

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	PL-259
B	Type N
C	RCA Phono
D	BNC

26. - G7A06

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

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

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 low when either or both inputs are high
C	Output is high only when both inputs are high
D	Output is high when either or both inputs are low

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	All types of modulation can be created with appropriate processing
B	Automatic conversion of the signal from digital to analog
C	The need for high resolution analog-to-digital converters is eliminated
D	Minimum detectible signal level is reduced

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency convolution
B	Frequency modulation
C	Frequency conversion
D	Frequency transformation

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	Some modes have high duty cycles that could exceed the transmitter’s average power rating
B	To prevent overmodulation
C	To allow time for the other station to break in during a transmission
D	To aid in tuning your transmitter

31. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	PSK31
B	MFSK16
C	WSPR
D	SSB-SC

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. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It is unaffected by the location of the feed point
B	It steadily increases
C	It steadily decreases
D	It peaks at about 1/8 wavelength from the end

34. - G9C05

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

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

35. - G9D04

What is the primary function of antenna traps?

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