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

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	At the closest power pole ground electrode
B	Where the feed lines enter the building
C	In series with each ground lead
D	On the antenna, opposite the feed point

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The lower frequency portion
B	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz
C	The upper frequency portion
D	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz

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 ITU
B	The control operator
C	The FCC
D	The IEEE

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	1200 baud
B	300 baud
C	56 kilobaud
D	19.6 kilobaud

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Only those of the FCC
B	Those of the remote station’s country and the FCC’s third-party regulations
C	Only those of the remote station’s country
D	Those of both the remote station’s country and the FCC

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	No part
B	Channels 42 through 45
C	Anywhere in the band
D	Channels 1 through 4

8. - G2A11

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

Select	Answer
A	Only contest stations
B	Only stations in Germany
C	Any caller is welcome to respond
D	Any stations outside the lower 48 states

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	Inform your local emergency coordinator
B	Immediately cease all transmissions
C	Immediately decrease power to avoid interfering with the station in distress
D	Acknowledge the station in distress and determine what assistance may be needed

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Closing station now
C	Operating full break-in
D	No US stations should call

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To follow standard radiogram structure
B	To allow each station to calibrate their frequency display
C	To allow each station to operate according to conditions
D	To be sure the contact will count for award programs

12. - G2E12

Which of the following describes Winlink?

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

13. - G3A09

How can high geomagnetic activity benefit radio communications?

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

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	HF communications over the path are enhanced
B	Propagation via ordinary skywave communications is not possible over that path
C	Double-hop propagation along the path is more common
D	Propagation over the path on all HF frequencies is enhanced

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

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

16. - G4A06

What is the purpose of an antenna tuner?

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

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	An oscilloscope
B	A sidetone monitor
C	A field strength meter
D	A wavemeter

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Bond equipment enclosures together
B	Avoid using lock washers and star washers when making ground connections
C	Connect all ground conductors in series
D	Connect the AC neutral conductor to the ground wire

19. - G4D04

What does an S meter measure?

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

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The socket is not wired with an RF-shielded power cable
C	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
D	The socket’s wiring may be inadequate for the current drawn by the transceiver

21. - G5A08

What is impedance?

Select	Answer
A	The product of current and reactance
B	The product of current and voltage
C	The ratio of voltage to current
D	The ratio of current to voltage

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	3200 watts
C	200 watts
D	400 watts

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	70 millihenries
C	14.3 millihenries
D	7 millihenries

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Trigger electrode
B	Control grid
C	Screen grid
D	Suppressor grid

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	50 MHz
B	500 MHz
C	40 GHz
D	4 GHz

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Half-wave
B	Full-wave
C	Synchronous
D	Full-wave bridge

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	All these choices are correct
B	AM
C	FM
D	SSB

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To minimize transmitter power output
B	To present the desired impedance to the transmitter and feed line
C	To reduce power supply ripple
D	To minimize radiation resistance

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 modulation
B	Frequency conversion
C	Frequency transformation
D	Frequency convolution

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Mixer interference
B	Image response
C	Quadrature response
D	Intermediate interference

31. - G8C02

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

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

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	2:1
C	5:1
D	1:5

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	Station equipment may carry significant RF current
B	It is more effective on the lower HF bands than on the higher bands
C	It produces only vertically polarized radiation
D	It must be longer than 1 wavelength

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
B	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
D	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Directional receiving for MF and low HF bands
B	Directional transmitting for low HF bands
C	Portable direction finding at higher HF frequencies
D	Portable direction finding at lower HF frequencies