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. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

Select	Answer
A	Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels
B	Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas
C	Post a copy of FCC Part 97.13 in the station
D	All these choices are correct

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	25 amperes
B	20 amperes
C	15 amperes
D	30 amperes

3. - G1A05

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

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

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	Unidentified test transmissions of less than 10 seconds in duration
B	Regular transmissions offering equipment for sale, if intended for amateur radio use
C	All these choices are correct
D	Transmissions to assist with learning the International Morse code

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1200 watts PEP output
B	1000 watts PEP output
C	1500 watts PEP output
D	200 watts PEP output

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	A special identifier is not required if their General class license application has been filed with the FCC
B	Whenever they operate using Technician frequency privileges
C	Whenever they operate on any amateur frequency
D	Whenever they operate using General class frequency privileges

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	When operating within one mile of an FCC Monitoring Station
C	When a station is transmitting spread spectrum emissions
D	All these choices are correct

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	The received signal is more natural sounding
B	It occupies less bandwidth
C	It provides more power output
D	It allows “hands free” operation

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	5 Hz to 50 Hz
B	150 Hz to 500 Hz
C	3 kHz to 6 kHz
D	1 kHz to 3 kHz

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Repeat everything twice
B	Change frequency
C	Increase your power
D	Send slower

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Send a QSL card to the stations worked, or QSL via Logbook of The World
B	Submit a log to the contest sponsor
C	Identify your station according to normal FCC regulations
D	All these choices are correct

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	850 Hz
B	425 Hz
C	170 Hz
D	85 Hz

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	Improve HF long path propagation
D	Creates auroras that can reflect VHF signals

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are amplified by interaction with the ionosphere
B	They are refracted back to Earth
C	They are refracted and trapped in the ionosphere to circle Earth
D	They pass through the ionosphere

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Signals have a fluttering sound
B	Scatter propagation occurs only at night
C	Phone signals have high intelligibility
D	There are very large, sudden swings in signal strength

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

17. - G4B10

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

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

18. - G4C08

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

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

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Decrease high-frequency voice output to prevent out-of-band operation
B	Increase transmitter bass response for more natural-sounding SSB signals
C	Prevent distortion of voice signals
D	Increase the apparent loudness of transmitted voice signals

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ground the solar panel outer metal framework
B	A series resistor must be in place
C	Ensure the battery is placed terminals-up
D	The solar panel must have a charge controller

21. - G5A05

How does an inductor react to AC?

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

22. - G5B03

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

Select	Answer
A	400 watts
B	0.5 watts
C	3200 watts
D	200 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	Screen grid
B	Suppressor grid
C	Trigger electrode
D	Control grid

25. - G6B10

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

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

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	The output voltage is two times the peak input voltage
B	The ripple frequency is twice that of a full-wave rectifier
C	Only one diode is required
D	More current can be drawn from the half-wave rectifier

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is high only when both inputs are high
B	Output is low only when both inputs are high
C	Output is high when either or both inputs are low
D	Output is low when either or both inputs are high

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	Automatic conversion of the signal from digital to analog
B	Minimum detectible signal level is reduced
C	All types of modulation can be created with appropriate processing
D	The need for high resolution analog-to-digital converters is eliminated

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	8-tone frequency shift keying
B	Vestigial sideband
C	8-bit direct sequence spread spectrum
D	Amplitude compressed AM

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is half the symbol rate
B	Higher symbol rates require wider bandwidth
C	Lower symbol rates require wider bandwidth
D	Symbol rate and bandwidth are not related

31. - G8C15

What does an FT8 signal report of +3 mean?

Select	Answer
A	The signal is 3 times the noise level of an equivalent SSB signal
B	The signal is S3 (weak signals)
C	The signal is 3 dB over S9
D	The signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	2:1
B	1:4
C	1:2
D	4:1

33. - G9B02

Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Lengthen the radials beyond one wavelength
B	Coil the radials
C	Slope the radials downward
D	Slope the radials upward

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	3/4 wavelength
B	1 wavelength
C	1/2 wavelength
D	1/4 wavelength

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Element length and spacing vary logarithmically along the boom
B	Gain varies logarithmically as a function of frequency
C	Impedance varies periodically as a function of frequency
D	SWR varies periodically as a function of boom length