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	All these choices are correct
C	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
D	Change to a non-polarized antenna with higher gain

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	The generator should be operated in a well-ventilated area
B	All these choices are correct
C	Fuel should be stored near the generator for rapid refueling in case of an emergency
D	The generator must be insulated from ground

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The upper frequency portion
B	The lower frequency portion
C	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz
D	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz

4. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
B	Under no circumstances, FCC rules take priority
C	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
D	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	2000 watts PEP output
B	200 watts PEP output
C	1500 watts PEP output
D	1000 watts PEP output

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	On any General or Technician class band segment
B	Only on the Technician band segments until you have a receipt for the FCC application fee payment
C	Only the Technician band segments until your upgrade is posted in the FCC database
D	On any General or Technician class band segment except 30 meters and 60 meters

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	Channels 1 through 4
B	Channels 42 through 45
C	No part
D	Anywhere in the band

8. - G2A05

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

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

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan
B	All these choices are correct
C	Listen on the frequency for at least two minutes to be sure it is clear
D	Identify your station by transmitting your call sign at least 3 times

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Matching the speed of the transmitting station
B	Sending without error
C	Operating split to avoid interference on frequency
D	Matching the transmit frequency to the frequency of a received signal

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	The FCC requires a log of all international third-party traffic
C	The log provides evidence of operation needed to renew a license without retest
D	To help with a reply if the FCC requests information about your station

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	Gateway
B	Terminal Node Controller
C	RJ-45
D	Printer/Server

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Rotation of the Sun’s surface layers around its axis
B	Long term oscillations in the upper atmosphere
C	Cyclic variation in Earth’s radiation belts
D	The position of the Moon in its orbit

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just above the LUF
B	Just below the MUF
C	Just above the critical frequency
D	Just below the critical frequency

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The frequency at which the signal-to-noise ratio approaches unity
B	The frequency at which the signal-to-noise ratio is 6 dB
C	The highest frequency which is refracted back to Earth
D	The lowest frequency which is refracted back to Earth

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	All these choices are correct
B	Increase power transfer from the transmitter to the feed line
C	Reduce the SWR in the feed line to the antenna
D	Reduce the power dissipation in the feedline to the antenna

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the resolution of the readings
B	It decreases the loading on circuits being measured
C	It allows for higher voltages to be safely measured
D	It improves the frequency response

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Bypass inductor
B	Forward-biased diode
C	Reverse-biased diode
D	Bypass capacitor

19. - G4D11

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

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

20. - G4E05

Which of the following most limits an HF mobile installation?

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

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Ohm
C	Siemens
D	Farad

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 9 dB
B	Approximately 3 dB
C	Approximately 2 dB
D	Approximately 6 dB

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	14.3 millihenries
B	1,000 millihenries
C	70 millihenries
D	7 millihenries

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	Inexpensive RF capacitor
B	Tight tolerance
C	Much less leakage than any other type
D	High capacitance for a given volume

25. - G6B11

What is an SMA connector?

Select	Answer
A	A type of push-on connector intended for high-voltage applications
B	A type-S to type-M adaptor
C	A connector designed for serial multiple access signals
D	A small threaded connector suitable for signals up to several GHz

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	270 degrees
B	360 degrees
C	180 degrees
D	90 degrees

27. - G7B06

What is a shift register?

Select	Answer
A	A digital mixer
B	An analog mixer
C	A clocked array of circuits that passes data in steps along the array
D	An array of operational amplifiers used for tri-state arithmetic operations

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in transmitter to perform frequency multiplication
B	Used in a single sideband receiver to extract the modulated signal
C	Used in an FM receiver to filter out unwanted sidebands
D	Used in test gear to detect spurious mixing products

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient bandwidth
B	Insufficient audio
C	Frequency drift
D	Excessive bandwidth

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The ratio
B	The sum and difference
C	The arithmetic product
D	The average

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	432 MHz
B	902 MHz
C	10.7 GHz
D	2.4 GHz

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. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	21 feet
B	11 feet
C	16 feet
D	8 feet

34. - G9C07

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

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

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Very high
B	Approximately 50 ohms
C	Approximately 300 ohms
D	Very low