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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Use an antenna with a higher front-to-back ratio
B	Change to a non-polarized antenna with higher gain
C	All these choices are correct
D	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present

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	20 amperes
B	15 amperes
C	30 amperes
D	25 amperes

3. - G1A03

On which of the following bands is image transmission prohibited?

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

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	All these choices are correct
B	Automatic identification of repeaters
C	Observation of propagation and reception
D	Transmission of bulletins of general interest to amateur radio licensees

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1500 watts PEP output
B	1000 watts PEP output
C	2000 watts PEP output
D	100 watts PEP output

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

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

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Double sideband
B	Frequency modulation
C	Single sideband
D	Single phase modulation

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	All these choices are correct
C	Have a backup frequency in case of interference or poor conditions
D	Always use multiple sets of phonetics during check-in

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	Send slower
B	We have already confirmed the contact
C	We have worked before
D	I have received and understood

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	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
C	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
D	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Anywhere in the CW portion of the band
B	Approximately 14.074 MHz to 14.077 MHz
C	Anywhere in the voice portion of the band
D	Approximately 14.110 MHz to 14.113 MHz

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A sudden drop in the solar flux index
B	A thunderstorm that affects radio propagation
C	Ripples in the geomagnetic force
D	A temporary disturbance in Earth’s geomagnetic field

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Path distance and location
B	All these choices are correct
C	Solar radiation and ionospheric disturbances
D	Time of day and season

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The F1 region
B	The D region
C	The F2 region
D	The E region

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	Automatic generation of dots and dashes for CW operation
B	Automatic transmit/receive switching
C	To allow time for switching the antenna from the receiver to the transmitter
D	Computer interface for PSK and RTTY operation

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two swept frequency tones
B	Two non-harmonically related audio signals
C	Two audio signals of the same frequency shifted 90 degrees
D	Two audio frequency range square wave signals of equal amplitude

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	You receive reports of “hum” on your station’s transmitted signal
B	An item of station equipment starts to draw excessive amounts of current
C	You receive reports of harmonic interference from your station
D	The SWR reading for one or more antennas is suddenly very high

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 1 kHz below the edge of the segment
B	At least 3 kHz above the edge of the segment
C	At least 1 kHz above the edge of the segment
D	At least 3 kHz below the edge of the segment

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the alternator or generator using insulated heavy duty balanced transmission line
B	To the alternator or generator using heavy-gauge wire
C	To the battery using heavy-gauge wire
D	To the battery using insulated heavy duty balanced transmission line

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	The circuit radiates all its energy in the form of radio waves
B	Current and voltage are equal
C	Resistance is cancelled
D	Inductive reactance and capacitive reactance cancel

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

Select	Answer
A	1060 watts
B	530 watts
C	2120 watts
D	1500 watts

23. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

Select	Answer
A	An inductor in parallel
B	An inductor in series
C	A capacitor in parallel
D	A capacitor in series

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.1 volt
B	0.7 volts
C	0.3 volts
D	1.0 volts

25. - G6B04

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

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

26. - G7A04

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

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

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The inductance and capacitance in the tank circuit
B	The number of stages in the counter
C	The number of stages in the divider
D	The time delay of the lag circuit

28. - G7C03

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

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

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using quasi-parallel to serial conversion to reduce bandwidth
B	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
C	Modulation using quadra-pole sideband keying to generate spread spectrum signals
D	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits

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	Symbol rate and bandwidth are not related
D	Lower symbol rates require wider bandwidth

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Viterbi
C	Varicode
D	Binary

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 100 feet
B	Ohms per 100 feet
C	Decibels per 1,000 feet
D	Ohms per 1,000 feet

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

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The spacing of each element along the boom
B	The physical length of the boom
C	All these choices are correct
D	The number of elements on the boom

35. - G9D07

Which of the following describes a log-periodic antenna?

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