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

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	As close to the station equipment as possible
B	Parallel to the water supply line
C	Outside the building
D	Next to the closest power pole

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	21.275 MHz to 21.300 MHz
B	28.000 MHz to 28.025 MHz
C	7.125 MHz to 7.175 MHz
D	All these choices are correct

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 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
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 foreign country has a formal third-party agreement filed with the FCC
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. - 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	56 kilobaud
C	300 baud
D	19.6 kilobaud

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

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 under automatic control
B	When messages are not encrypted
C	When messages are encrypted
D	Under no circumstances

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Attenuator level
B	RF clipping level
C	Antenna inductance or capacitance
D	Transmit audio or microphone gain

9. - G2B01

Which of the following is true concerning access to frequencies?

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

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Automatic keyers, instead of hand keys, are used to send Morse code
B	An operator must activate a manual send/receive switch before and after every transmission
C	Transmitting stations can receive between code characters and elements
D	Breaking stations send the Morse code prosign “BK”

11. - G2D02

Which of the following are objectives of the Volunteer Monitor Program?

Select	Answer
A	To provide emergency and public safety communications
B	To coordinate repeaters for efficient and orderly spectrum usage
C	To encourage amateur radio operators to self-regulate and comply with the rules
D	To conduct efficient and orderly amateur licensing examinations

12. - G2E07

Which of the following is required when using FT8?

Select	Answer
A	Computer time accurate to within approximately 1 second
B	A vertically polarized antenna
C	A special hardware modem
D	Receiver attenuator set to -12 dB

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	At the summer solstice
B	At any point
C	Only at the maximum point
D	Only at the minimum point

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. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
B	The long path azimuth of a distant station
C	The short path azimuth of a distant station
D	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier power supply to reach operating level
B	To prevent transient overmodulation
C	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
D	To prevent key clicks on CW

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An ammeter
B	An ohmmeter
C	An oscilloscope
D	A signal generator

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Arcing at a poor electrical connection
B	Using a balun to feed an unbalanced antenna
C	Not using a balun or line isolator to feed balanced antennas
D	Lack of rectification of the transmitter’s signal in power conductors

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.344 MHz to 14.347 MHz
B	14.347 MHz to 14.647 MHz
C	14.347 MHz to 14.350 MHz
D	14.3455 MHz to 14.3485 MHz

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The battery charging system
B	All these choices are correct
C	The control computers
D	The fuel delivery system

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the amplitude of the applied AC increases, the reactance decreases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance increases

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	245 volts
B	173 volts
C	692 volts
D	346 volts

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	0.33 microfarads
B	33.3 microfarads
C	3.0 microfarads
D	300 microfarads

24. - G6A08

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

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

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	It converts common-mode current to differential mode current
B	Ferrites expel magnetic fields
C	By creating an out-of-phase current to cancel the common-mode current
D	By creating an impedance in the current’s path

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 6
B	Symbol 7
C	Symbol 11
D	Symbol 1

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	3
B	16
C	8
D	6

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. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Vestigial sideband
C	Frequency modulation
D	Single sideband

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	All these choices are correct
B	3F1-F2
C	5F1-3F2
D	2F1-F2

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Receiving station connected and ready for transmissions
B	Request retransmission of the packet
C	Packet was received without error
D	Entire file received correctly

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	450 ohms
B	100 ohms
C	50 ohms
D	75 ohms

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	Parallel to the antenna element
B	At the center of the antenna
C	As high as possible above the ground
D	On the surface or buried a few inches below the ground

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	The reflector is longer, and the director is shorter
B	Relative length depends on the frequency of operation
C	The reflector is shorter, and the director is longer
D	They are all the same length

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Sloper
B	Inverted V
C	Inverted L
D	Lazy H

Figure G7-1