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. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By measurement of field strength using calibrated equipment
B	All these choices are correct
C	By calculation based on FCC OET Bulletin 65
D	By calculation based on computer modeling

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Overvoltage on the hot wires
B	Current flowing from one or more of the hot wires to the neutral wire
C	All these choices are correct
D	Current flowing from one or more of the hot wires directly to ground

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

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The IEEE
B	The ITU
C	The FCC
D	The control operator

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	5.6 kHz
B	3 kHz
C	2.8 kHz
D	1.8 kHz

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. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must be for other licensed amateurs
B	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	They must relate to emergencies or disaster relief
D	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband is transmitted; the other sideband and carrier are suppressed
B	Only one sideband and the carrier are transmitted; the other sideband is suppressed
C	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
D	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

Select	Answer
A	Only digital contacts
B	Only contacts with other stations within the 48 contiguous states
C	Only contacts with stations not within the 48 contiguous states
D	Only SSTV contacts

10. - G2C04

What does the Q signal “QRL?” mean?

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

11. - G2D10

What is QRP operation?

Select	Answer
A	Remote piloted model control
B	Low-power transmit operation
C	Traffic relay procedure net operation
D	Transmission using Quick Response Protocol

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

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Creates auroras that can reflect VHF signals
B	Improve HF long path propagation
C	Reduce long delayed echoes
D	Increases signal strength for HF signals passing through the polar regions

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Path distance and location
B	Solar radiation and ionospheric disturbances
C	All these choices are correct
D	Time of day and season

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The F2 region
B	The D region
C	The F1 region
D	The E region

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To reduce interference from carriers in the receiver passband
B	To remove interfering splatter generated by signals on adjacent frequencies
C	To restrict the transmitter voice bandwidth
D	To eliminate receiver interference from impulse noise sources

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Greater precision
B	Complex impedances can be easily measured
C	An oscilloscope uses less power
D	Complex waveforms can be measured

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It prevents signal overload
B	It ensures that hazardous voltages cannot appear on the chassis
C	It prevents a blown fuse in the event of an internal short circuit
D	It ensures that the neutral wire is grounded

19. - G4D04

What does an S meter measure?

Select	Answer
A	Carrier suppression
B	Transmitter power output
C	Received signal strength
D	Impedance

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	FCC rules limiting mobile output power on the 75-meter band
B	“Picket fencing”
C	The wire gauge of the DC power line to the transceiver
D	Efficiency of the electrically short antenna

21. - G5A10

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

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

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	12.2 percent
B	10.9 percent
C	25.9 percent
D	20.6 percent

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	17 ohms
B	0.17 ohms
C	5.9 ohms
D	80 ohms

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase efficiency
B	To reduce grid-to-plate capacitance
C	To increase the control grid resistance
D	To decrease plate resistance

25. - G6B08

How is an LED biased when emitting light?

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

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	Faster switching time makes higher output voltage possible
D	Fewer circuit components are required

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. - G7C13

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B08

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

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

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	Encoding reverts to the default character set
B	The connection is dropped
C	Packets will be routed incorrectly
D	The checksum overflows

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	1:1
B	5:1
C	Between 1:1 and 5:1 depending on the characteristic impedance of the line
D	Between 1:1 and 5:1 depending on the reflected power at the transmitter

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	8 feet
B	16 feet
C	11 feet
D	21 feet

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The physical length of the boom
B	All these choices are correct
C	The number of elements on the boom
D	The spacing of each element along the boom

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