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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	All these choices are correct
B	File an Environmental Impact Statement (EIS-97) with the FCC
C	Take action to prevent human exposure to the excessive RF fields
D	Secure written permission from your neighbors to operate above the controlled MPE limits

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	RF energy can convert the lead into a poisonous gas
B	Tin in the solder can “cold flow,” causing shorts in the circuit
C	Lead can contaminate food if hands are not washed carefully after handling the solder
D	High voltages can cause lead-tin solder to disintegrate suddenly

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

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	On any frequency if power is less than 1 watt
B	21.08 MHz to 21.09 MHz
C	28.20 MHz to 28.30 MHz
D	On any frequency if transmissions are in Morse code

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. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Federal Communications Commission
B	A Volunteer Examiner Coordinator
C	The Wireless Telecommunications Bureau
D	The Universal Licensing System

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party is speaking in a language other than English
B	The third party is not a US citizen
C	All these choices are correct
D	The third party’s amateur license has been revoked and not reinstated

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

Select	Answer
A	Suppressed sideband
B	Lower sideband
C	Upper sideband
D	Double sideband

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

Select	Answer
A	Only contacts with other stations within the 48 contiguous states
B	Only SSTV contacts
C	Only contacts with stations not within the 48 contiguous states
D	Only digital contacts

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Change frequency
B	Increase your power
C	Repeat everything twice
D	Send slower

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E15

Which of the following is a common location for FT8?

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

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	VHF/UHF ducting is disturbed
B	VHF/UHF ducting is improved
C	HF communication is improved
D	HF communication is disturbed

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	HF communications over the path are enhanced
B	Double-hop propagation along the path is more common
C	Propagation over the path on all HF frequencies is enhanced
D	Propagation via ordinary skywave communications is not possible over that path

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. - G4A06

What is the purpose of an antenna tuner?

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

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	Higher precision
D	Less prone to overload

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	High RF voltages on the enclosures of station equipment
B	A ground loop
C	Corrosion of the ground rod
D	Overheating of ground straps

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It reduces harmonic distortion
B	It increases peak power
C	It reduces intermodulation distortion
D	It increases average power

20. - G4E07

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

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

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	400 watts
B	100 watts
C	353.5 watts
D	1.4 watts

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	3.5 to 1
B	144 to 1
C	12 to 1
D	24 to 1

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	High capacitance for given volume
B	High stability
C	Tight tolerance
D	Comparatively low cost

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Digital
B	Analog
C	Programmable Logic
D	MMIC

26. - G7A06

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

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

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	Less than 50%
B	More than 50% but less than 100%
C	100%
D	50%

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	Minimum detectible signal level is reduced
B	All types of modulation can be created with appropriate processing
C	Automatic conversion of the signal from digital to analog
D	The need for high resolution analog-to-digital converters is eliminated

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Heterodyning
B	Rolloff
C	Intermodulation
D	Detection

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	MSK144
B	FT8
C	MFSK32
D	AMTOR

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the length of the line
B	The frequency of the signal and the length of the line
C	The distance between the centers of the conductors and the radius of the conductors
D	The radius of the conductors and the frequency of the signal

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

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	1 wavelength
B	1/4 wavelength
C	1/2 wavelength
D	3/4 wavelength

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Portable direction finding at lower HF frequencies
B	Directional receiving for MF and low HF bands
C	Directional transmitting for low HF bands
D	Portable direction finding at higher HF frequencies