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. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	High duty cycle transmitters are exempt from RF exposure requirements
B	A lower duty cycle permits greater power levels to be transmitted
C	A higher duty cycle permits greater power levels to be transmitted
D	Low duty cycle transmitters are exempt from RF exposure evaluation requirements

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable modulation limits
B	Electrical safety of the station
C	Acceptable bandwidth limits
D	RF exposure limits of the human body

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	60 meters
B	30 meters
C	11 meters
D	12 meters

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	100 watts PEP output
B	200 watts PEP output
C	10 watts PEP output
D	20 watts PEP output

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of the manufacturer of your equipment and the antenna used
B	You must keep a record of the date, time, frequency, power level, and stations worked
C	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
D	You must keep a record of all third-party traffic

6. - G1D01

Who may receive partial credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
B	Any person who can demonstrate that they once held an FCC-issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC
C	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
D	Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	The control operator of the interrogating station must hold an Amateur Extra class license
C	No third-party traffic may be transmitted
D	The station initiating the contact must be under local or remote control

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

Select	Answer
A	Upper sideband
B	Double sideband
C	Suppressed sideband
D	Lower sideband

9. - G2B01

Which of the following is true concerning access to frequencies?

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

10. - G2C01

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

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

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary
B	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
C	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
D	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide FM repeater coverage in remote areas
B	To provide high-speed data services during an emergency or community event
C	To provide real time propagation data by monitoring amateur radio transmissions worldwide
D	To provide DX spotting reports to aid contesters and DXers

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It disrupts signals on lower frequencies more than those on higher frequencies
B	None, because only areas on the night side of the Earth are affected
C	It disrupts communications via satellite more than direct communications
D	It enhances propagation on all HF frequencies

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 during a 24-hour period
D	The Minimum Usable Frequency for communications between two points

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Ground waves are absorbing much of the signal
B	The ionospheric region involved is unstable
C	The E region is not present
D	Energy is scattered into the skip zone through several different paths

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	Received signals may become distorted
B	CW signals may become severely attenuated
C	Received frequency may become unstable
D	Received frequency may shift several kHz

17. - G4B02

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

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

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	A chirpy CW signal
B	A CW signal at a nearly pure audio frequency
C	On-and-off humming or clicking
D	Severely distorted audio

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times more powerful
B	It is 20 times less powerful
C	It is 10 times less powerful
D	It is 100 times more powerful

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	The solar panel must have a charge controller
D	Ensure the battery is placed terminals-up

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reluctance
B	Conductance
C	Admittance
D	Reactance

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	200 watts
C	0.5 watts
D	3200 watts

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	12 to 1
B	24 to 1
C	3.5 to 1
D	144 to 1

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	12 volts
B	8.5 volts
C	10.5 volts
D	6 volts

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A nickel plated version of the PL-259
B	A low noise figure VHF connector
C	A moisture-resistant RF connector useful to 10 GHz
D	A small bayonet connector used for data circuits

26. - G7A13

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

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

27. - G7B07

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

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

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	180 degrees
B	Zero
C	90 degrees
D	45 degrees

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By keying an FM transmitter with a sub-audible tone
B	By using a transceiver’s computer data interface protocol to change frequencies
C	By changing an oscillator’s frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

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

31. - G8C10

How does forward error correction (FEC) allow the receiver to correct data errors?

Select	Answer
A	By controlling transmitter output power for optimum signal strength
B	By transmitting redundant information with the data
C	By using the Varicode character set
D	By using a parity bit with each character

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss reduces SWR measured at the input to the line
B	Higher loss increases SWR measured at the input to the line
C	Higher loss increases the accuracy of SWR measured at the input to the line
D	Transmission line loss does not affect the SWR measurement

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	132 feet
B	263 feet
C	84 feet
D	42 feet

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	It does not require any inductors or capacitors
B	It does not require the driven element to be insulated from the boom
C	It is useful for matching multiband antennas
D	All these choices are correct

35. - G9D07

Which of the following describes a log-periodic antenna?

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

Figure G7-1