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. - G0A06

What must you do if your station fails to meet the FCC RF exposure exemption criteria?

Select	Answer
A	Contact the FCC for permission to transmit
B	Use an FCC-approved band-pass filter
C	Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines
D	Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65

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. - 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 except 160 meters and 10 meters
C	60 meters, 30 meters, 17 meters, and 12 meters
D	All HF bands

4. - G1B04

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

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

5. - G1C11

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

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

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	The Wireless Telecommunications Bureau
C	A Volunteer Examiner Coordinator
D	The Federal Communications Commission

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Under no circumstances
B	Only during an FCC-declared general state of communications emergency
C	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
D	Only if the 10-meter repeater control operator holds at least a General class license

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Less subject to interference from atmospheric static crashes
B	Less bandwidth used and greater power efficiency
C	Very high-fidelity voice modulation
D	Ease of tuning on receive and immunity to impulse noise

9. - G2B01

Which of the following is true concerning access to frequencies?

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

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Are you listening only for a specific station?”
B	“Are you operating full break-in?” or “Can you operate full break-in?”
C	“Are you busy?” or “Is this frequency in use?”
D	“Will you keep the frequency clear?”

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

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Call on any frequency in the waterfall except the station’s frequency
B	Always call on the station’s frequency
C	Find a clear frequency during the alternate time slot to the calling station
D	Find a clear frequency during the same time slot as the calling station

13. - G3A04

Which of the following are the least reliable bands for long-distance communications during periods of low solar activity?

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

14. - G3B07

What does LUF stand for?

Select	Answer
A	Lowest Usable Frequency for communications to any point outside a 100-mile radius
B	The Lowest Usable Frequency for communications between two specific points
C	Lowest Usable Frequency during the past 60 minutes
D	The Lowest Usable Frequency during a 24-hour period

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ducts in the F region, which absorb most of the energy
B	Signals are scattered from the magnetosphere, which is not a good reflector
C	Only a small part of the signal energy is scattered into the skip zone
D	Propagation is via ground waves, which absorb most of the signal energy

16. - G4A06

What is the purpose of an antenna tuner?

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

17. - G4B10

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

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

18. - G4C08

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

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

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	12 dB
B	6 dB
C	15 dB
D	18 dB

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the battery using heavy-gauge wire
B	To the alternator or generator using heavy-gauge wire
C	To the alternator or generator using insulated heavy duty balanced transmission line
D	To the battery using insulated heavy duty balanced transmission line

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Resonance causes impedance to be very low
B	Impedance is equal to the geometric mean of the inductance and capacitance
C	Resonance causes impedance to be very high
D	Impedance is equal to the arithmetic mean of the inductance and capacitance

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	0.5 watts
B	400 watts
C	3200 watts
D	200 watts

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	300 ohms
B	75 ohms
C	150 ohms
D	67 ohms

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	It becomes capacitive
B	Its reactance increases
C	Harmonics are generated
D	Catastrophic failure is likely

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Reverse biased
B	At the Zener voltage
C	Forward biased
D	In the tunnel-effect region

26. - G7A08

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

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

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

Select	Answer
A	A frequency multiplier and a mixer
B	A circulator and a filter operating in a feed-forward loop
C	A filter and an amplifier operating in a feedback loop
D	An amplifier and a divider

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Insertion loss
B	Rolloff
C	Ultimate rejection
D	Notch depth

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 transformation
C	Frequency modulation
D	Frequency conversion

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	Multiplier
B	Reactance modulator
C	Mixer
D	Balanced converter

31. - G8C02

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

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

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	Operating an antenna at its resonant frequency
C	Feeding the antenna with unbalanced feed line
D	Using more transmitter power than the antenna can handle

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	8 feet
C	33 feet
D	24 feet

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	Gain increases
C	Beamwidth increases
D	Front-to-back ratio decreases

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It allows quick selection of vertical or horizontal polarization
B	It narrows the main lobe in azimuth
C	It narrows the main lobe in elevation
D	It allows simultaneous vertical and horizontal polarization