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

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
B	To shut off the power supply if too much voltage is produced
C	To ensure that dangerous voltages are removed if the cabinet is opened
D	To shut down the unit if it becomes too hot

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	20 meters
B	160 meters
C	30 meters
D	12 meters

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	They are not permitted
B	Only “Q” signals are permitted
C	They may be used if they do not obscure the meaning of a message
D	They are limited to those expressly listed in Part 97 of the FCC rules

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	19.6 kilobaud
C	56 kilobaud
D	300 baud

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 using General class frequency privileges
D	Whenever they operate on any amateur frequency

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for licensed radio amateurs
B	Under any circumstances in which third party messages are permitted by FCC rules
C	Under no circumstances except for emergencies
D	Only when the message is intended for third parties in areas where licensing is controlled by the FCC

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Less bandwidth used and greater power efficiency
B	Less subject to interference from atmospheric static crashes
C	Very high-fidelity voice modulation
D	Ease of tuning on receive and immunity to impulse noise

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	Transmit the full net roster at the beginning of every session
B	Have a backup frequency in case of interference or poor conditions
C	All these choices are correct
D	Always use multiple sets of phonetics during check-in

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	An operator must activate a manual send/receive switch before and after every transmission
C	Automatic keyers, instead of hand keys, are used to send Morse code
D	Transmitting stations can receive between code characters and elements

11. - G2D09

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

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

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	Frequent retries or timeouts
B	All these choices are correct
C	Long pauses in message transmission
D	Failure to establish a connection between stations

13. - G3A02

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

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

14. - G3B11

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

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

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

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

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce excessive audio level on strong signals
B	To prevent receiver overload from strong incoming signals
C	To reduce power consumption when operating from batteries
D	To reduce the transmitter power when driving a linear amplifier

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Antenna and feed line
B	Receiver
C	Transmitter
D	All these choices are correct

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Placing low-pass filters on all feed lines
B	Building all equipment in a metal enclosure
C	Bonding all equipment enclosures together
D	Using surge suppressor power outlets

19. - G4D04

What does an S meter measure?

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

20. - G4E05

Which of the following most limits an HF mobile installation?

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

21. - G5A10

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

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

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	1.00
B	0.707
C	1.414
D	2.00

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	3.5 to 1
C	24 to 1
D	144 to 1

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is separated from the channel by a thin insulating layer
B	The source is separated from the drain by a thin insulating layer
C	The source is formed by depositing metal on silicon
D	The gate is formed by a back-biased junction

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Digital
B	Programmable Logic
C	Analog
D	MMIC

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 4
B	Symbol 7
C	Symbol 1
D	Symbol 6

27. - G7B11

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

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

28. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

Select	Answer
A	Notch frequency
B	Neper frequency
C	Rolloff frequency
D	Cutoff frequency

29. - G8A13

What is a link budget?

Select	Answer
A	The difference between transmit power and receiver sensitivity
B	The sum of transmit power and antenna gains minus system losses as seen at the receiver
C	The financial costs associated with operating a radio link
D	The sum of antenna gains minus system losses

30. - G8B13

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

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

31. - G8C10

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

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

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Using more transmitter power than the antenna can handle
B	A difference between feed line impedance and antenna feed point impedance
C	Feeding the antenna with unbalanced feed line
D	Operating an antenna at its resonant frequency

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	84 feet
C	42 feet
D	263 feet

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The number of directors versus the number of reflectors
C	The power radiated in the major lobe compared to that in the opposite direction
D	The relative position of the driven element with respect to the reflectors and directors

35. - G9D09

What is the primary use of a Beverage antenna?

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

Figure G7-1