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

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	Parallel to the water supply line
B	As close to the station equipment as possible
C	Next to the closest power pole
D	Outside the building

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	The entire band
C	28.000 MHz to 28.300 MHz only
D	28.000 MHz to 28.025 MHz only

4. - G1B07

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

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

5. - G1C08

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

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

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	365 days
B	For as long as your current license is valid
C	30 days
D	180 days

7. - G1E12

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

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

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband is more efficient than upper sideband at these frequencies
B	Lower sideband is the only sideband legal on these frequency bands
C	Because it is fully compatible with an AM detector
D	It is commonly accepted amateur practice

9. - G2B11

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

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

10. - G2C10

What does the Q signal “QRN” mean?

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

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Alpha, Bravo, Charlie, Delta
B	Adam, Boy, Charles, David
C	Able, Baker, Charlie, Dog
D	America, Boston, Canada, Denmark

12. - G2E10

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

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

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

Select	Answer
A	14 days
B	4 to 8 minutes
C	15 hours to several days
D	28 days

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

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	There are very large, sudden swings in signal strength
B	Signals have a fluttering sound
C	Phone signals have high intelligibility
D	Scatter propagation occurs only at night

16. - G4A08

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

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

17. - G4B05

Why do voltmeters have high input impedance?

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

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Place a ferrite choke on the cable
B	Ground the center conductor of the audio cable causing the interference
C	Connect the center conductor to the shield of all cables to short circuit the RFI signal
D	Add an additional insulating jacket to the cable

19. - G4D06

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

Select	Answer
A	15 dB
B	6 dB
C	18 dB
D	12 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	The control computers
C	The fuel delivery system
D	All these choices are correct

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	B
B	Z
C	Y
D	X

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	346 volts
B	245 volts
C	173 volts
D	692 volts

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	150 ohms
B	67 ohms
C	300 ohms
D	75 ohms

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Catastrophic failure is likely
B	Its reactance increases
C	It becomes capacitive
D	Harmonics are generated

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	Its conductivity
B	The ratio of outer diameter to inner diameter
C	The composition, or “mix,” of materials used
D	Its thickness

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 2
B	Symbol 4
C	Symbol 5
D	Symbol 1

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is low only when both inputs are high
B	Output is low when either or both inputs are high
C	Output is high only when both inputs are high
D	Output is high when either or both inputs are low

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	RF amplifier
C	IF amplifier
D	Carrier oscillator

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The waveform created by connecting the peak values of the modulated signal
B	The bandwidth of the modulated signal
C	The carrier frequency that contains the signal
D	Spurious signals that envelop nearby frequencies

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. - G8C09

Which is true of mesh network microwave nodes?

Select	Answer
A	More nodes reduce overall microwave out of band interference
B	If one node fails, a packet may still reach its target station via an alternate node
C	Having more nodes increases signal strengths
D	Links between two nodes in a network may have different frequencies and bandwidths

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	2:1
B	1:4
C	4:1
D	1:2

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily decreases
B	It steadily increases
C	It is unaffected by the height above ground
D	It peaks at about 1/8 wavelength above ground

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

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Harmonic suppression
B	Polarization diversity
C	Wide bandwidth
D	Higher gain per element than a Yagi antenna

Figure G7-1