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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	A calibrated field strength meter with a calibrated antenna
B	An SWR meter with a peak-reading function
C	An oscilloscope with a high-stability crystal marker generator
D	A receiver with digital signal processing (DSP) noise reduction

2. - G0B06

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

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

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.025 MHz to 28.300 MHz only
B	28.000 MHz to 28.300 MHz only
C	The entire band
D	28.000 MHz to 28.025 MHz only

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Automatic retransmission of other amateur signals by any amateur station
B	Occasional retransmission of weather and propagation forecast information from US government stations
C	Encrypted messages, if not intended to facilitate a criminal act
D	Unidentified transmissions of less than 10 seconds duration for test purposes only

5. - G1C05

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

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

6. - G1D11

What action is required to obtain a new General class license after a previously held license has expired and the two-year grace period has passed?

Select	Answer
A	There are no requirements other than being able to show a copy of the expired license
B	They must have a letter from the FCC showing they once held an amateur or commercial license
C	Contact the FCC to have the license reinstated
D	The applicant must show proof of the appropriate expired license grant and pass the current Element 2 exam

7. - G1E12

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

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

8. - G2A05

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

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

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per month
B	No more than 1 hour per week
C	No more than 2 hours per month
D	No more than 2 hours per week

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	The fastest speed at which you are comfortable copying, but no slower than the CQ
B	At the standard calling speed of 5 wpm
C	At the standard calling speed of 10 wpm
D	The fastest speed at which you are comfortable copying, but no faster than the CQ

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	Submit a log to the contest sponsor
C	Send a QSL card to the stations worked, or QSL via Logbook of The World
D	All these choices are correct

12. - G2E13

What is another name for a Winlink Remote Message Server?

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

13. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of solar radiation with a wavelength of 10.7 centimeters
B	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
C	Another name for the American sunspot number
D	A count of sunspots that is adjusted for solar emissions

14. - G3B10

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the E region?

Select	Answer
A	180 miles
B	12,000 miles
C	2,500 miles
D	1,200 miles

15. - G3C08

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

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

16. - G4A08

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

Select	Answer
A	Desired power output without exceeding maximum allowable plate current
B	Minimum SWR on the antenna
C	Minimum plate current without exceeding maximum allowable grid current
D	Highest plate voltage while minimizing grid current

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When adjusting circuits for maximum or minimum values
B	When measuring the frequency of an oscillator
C	When high precision is desired
D	When testing logic circuits

18. - G4C04

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

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

19. - G4D04

What does an S meter measure?

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

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To limit the current flowing from the panel to a safe value
B	To prevent discharge of the battery through the panel during times of low or no illumination
C	To prevent damage to the battery due to excessive voltage at high illumination levels
D	To prevent overload by regulating the charging voltage

21. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of alternating current caused by capacitance or inductance
B	Opposition to the flow of direct current caused by resistance
C	Reinforcement of the flow of direct current caused by resistance
D	Reinforcement of the flow of alternating current caused by capacitance or inductance

22. - G5B09

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

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

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	70 microfarads
B	0.07 microfarads
C	14.3 microfarads
D	1,000 microfarads

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor’s internal capacitance would detune the circuit
B	The resistor’s inductance could make circuit performance unpredictable
C	The resistor’s tolerance value would not be adequate
D	The resistor could overheat

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	It converts common-mode current to differential mode current
B	Ferrites expel magnetic fields
C	By creating an impedance in the current’s path
D	By creating an out-of-phase current to cancel the common-mode current

26. - G7A03

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

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

27. - G7B11

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

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

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	All these choices are correct
B	Modulation
C	Filtering
D	Detection

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	It is sideband sensitive
B	Its bandwidth is approximately the same as BPSK31
C	Its encoding provides error correction
D	All these choices are correct

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It results in the best signal-to-noise ratio
B	It improves impedance matching of the antenna
C	It is required by FCC rules
D	It minimizes power consumption in the receiver

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Long path propagation
B	Backscatter propagation
C	Overmodulation
D	Insufficient modulation

32. - G9A06

In what units is RF feed line loss usually expressed?

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

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Omnidirectional in azimuth
B	Hemispherical
C	Isotropic
D	Bi-directional in azimuth

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBd is 1.25 dBd lower
B	Gain in dBd is 1.25 dBd higher
C	Gain in dBi is 2.15 dB lower
D	Gain in dBi is 2.15 dB higher

35. - G9D07

Which of the following describes a log-periodic antenna?

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