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

2. - G0B10

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

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

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

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

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Occasional retransmission of weather and propagation forecast information from US government stations
B	Automatic retransmission of other amateur signals by any amateur station
C	Encrypted messages, if not intended to facilitate a criminal act
D	Unidentified transmissions of less than 10 seconds duration for test purposes only

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. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	A US operator/primary station license
B	Only an appropriate US operator/primary license and a special remote station permit from the FCC
C	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
D	A license from the foreign country and a special remote station permit from the FCC

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	No third-party traffic may be transmitted
C	The station initiating the contact must be under local or remote control
D	The control operator of the interrogating station must hold an Amateur Extra class license

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Nets have priority
B	QSOs in progress have priority
C	Except during emergencies, no amateur station has priority access to any frequency
D	Contest operations should yield to non-contest use of frequencies

10. - G2C08

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

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

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	All of the above
B	An amateur radio wireless network to send and receive email on the internet
C	A form of Packet Radio
D	A wireless network capable of both VHF and HF band operation

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It disrupts communications via satellite more than direct communications
B	It enhances propagation on all HF frequencies
C	It disrupts signals on lower frequencies more than those on higher frequencies
D	None, because only areas on the night side of the Earth are affected

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency for communications between two points
B	The Maximum Usable Frequency during a 24-hour period
C	The Minimum Usable Frequency for communications between two points
D	The Minimum Usable Frequency during a 24-hour period

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

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

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To allow transmitting on two frequencies at once
B	To permit full duplex operation -- that is, transmitting and receiving at the same time
C	To transmit on one frequency and listen on another
D	To improve frequency accuracy by allowing variable frequency output (VFO) operation

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two audio frequency range square wave signals of equal amplitude
B	Two audio signals of the same frequency shifted 90 degrees
C	Two non-harmonically related audio signals
D	Two swept frequency tones

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	A soldered joint will likely be destroyed by the heat of a lightning strike
B	All these choices are correct
C	Solder has too high a dielectric constant to provide adequate lightning protection
D	Solder flux will prevent a low conductivity connection

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Excessive background noise
B	All these choices are correct
C	Distorted speech
D	Excess intermodulation products

20. - G4E06

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

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

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B01

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

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

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A capacitor in series
B	A capacitor in parallel
C	An inductor in series
D	An inductor in parallel

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	Comparatively low cost
C	High capacitance for given volume
D	High stability

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	The composition, or “mix,” of materials used
B	The ratio of outer diameter to inner diameter
C	Its conductivity
D	Its thickness

26. - G7A09

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

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

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Divide the RF output power by the DC input power
C	Add the RF input power to the DC output power
D	Divide the DC input power by the DC output power

28. - G7C11

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	It is sideband sensitive
B	Its encoding provides error correction
C	Its bandwidth is approximately the same as BPSK31
D	All these choices are correct

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Mixer
B	Multiplier
C	Balanced converter
D	Reactance modulator

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Overmodulation
B	Long path propagation
C	Backscatter propagation
D	Insufficient modulation

32. - G9A01

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

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

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter radials
B	Lower feed point impedance
C	Lower ground losses
D	Lower radiation resistance

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The relative position of the driven element with respect to the reflectors and directors
C	The power radiated in the major lobe compared to that in the opposite direction
D	The number of directors versus the number of reflectors

35. - G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

Select	Answer
A	In the plane of the loop
B	Broadside and in the plane of the loop
C	Electrically small loops are omnidirectional
D	Broadside to the loop

Figure G7-1