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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The total time of the exposure
B	The average time it takes RF radiation to have any long-term effect on the body
C	The average amount of power developed by the transmitter over a specific 24-hour period
D	The total RF exposure averaged over a certain period

2. - G0B06

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

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

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

4. - G1B10

What is the power limit for beacon stations?

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

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	1200 baud
B	19.6 kilobaud
C	300 baud
D	56 kilobaud

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

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	These frequencies are set aside for bulletins from the FCC
B	These frequencies are set aside for emergency operations
C	A system of automatic digital stations operates on those frequencies
D	A system of propagation beacon stations operates on those frequencies

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
B	Only one sideband is transmitted; the other sideband and carrier are suppressed
C	Only one sideband and the carrier are transmitted; the other sideband is suppressed
D	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response
B	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
C	Listen for 2 minutes before calling CQ
D	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Stop sending
B	I am troubled by static
C	Zero beat my signal
D	Send more slowly

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To allow each station to calibrate their frequency display
B	To follow standard radiogram structure
C	To allow each station to operate according to conditions
D	To be sure the contact will count for award programs

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Transmit a connect message on the station’s published frequency
B	Send an email to the system control operator
C	Send QRL in Morse code
D	Respond when the station broadcasts its SSID

13. - G3A10

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

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

14. - G3B03

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

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

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal energy
B	Propagation is via ducts in the F region, which absorb most of the energy
C	Only a small part of the signal energy is scattered into the skip zone
D	Signals are scattered from the magnetosphere, which is not a good reflector

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A pronounced dip
B	A slow, rhythmic oscillation
C	No change will be observed
D	A pronounced peak

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Faster response
B	Better for measuring computer circuits
C	Less prone to overload
D	Higher precision

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	Distorted speech
B	A steady hum whenever the transmitter is on the air
C	Clearly audible speech
D	On-and-off humming or clicking

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	12 dB
B	6 dB
C	15 dB
D	18 dB

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The battery charging system
B	All these choices are correct
C	The fuel delivery system
D	The control computers

21. - G5A06

How does a capacitor 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 decreases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance decreases

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	24 volts
B	34 volts
C	12 volts
D	8.5 volts

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	0.30 henries
B	3.3 henries
C	30 millihenries
D	3.3 millihenries

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	0.3 volts
B	0.1 volt
C	0.7 volts
D	1.0 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 moisture-resistant RF connector useful to 10 GHz
C	A low noise figure VHF connector
D	A small bayonet connector used for data circuits

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Synchronous
B	Half-wave
C	Full-wave
D	Full-wave bridge

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	An amplifier used as a frequency multiplier
B	A Class C high efficiency amplifier
C	An amplifier in which the output preserves the input waveform
D	Any RF power amplifier used in conjunction with an amateur transceiver

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	Rolloff frequency
C	Cutoff frequency
D	Neper frequency

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Phase modulation
B	Amplitude modulation
C	Power modulation
D	Frequency modulation

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Lower symbol rates require wider bandwidth
B	Higher symbol rates require wider bandwidth
C	Symbol rate and bandwidth are not related
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 using the Varicode character set
B	By transmitting redundant information with the data
C	By controlling transmitter output power for optimum signal strength
D	By using a parity bit with each character

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	Between 1:1 and 5:1 depending on the reflected power at the transmitter
B	1:1
C	Between 1:1 and 5:1 depending on the characteristic impedance of the line
D	5:1

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter radials
B	Lower radiation resistance
C	Lower ground losses
D	Lower feed point impedance

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 6 dB higher
B	Approximately 3 dB higher
C	Approximately 1.5 dB higher
D	Approximately 9 dB higher

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To notch spurious frequencies
B	To prevent out-of-band operation
C	To provide balanced feed point impedance
D	To enable multiband operation