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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes the blood count to reach a dangerously low level
B	It heats body tissue
C	It causes radiation poisoning
D	It cools body tissue

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 12
B	AWG number 20
C	AWG number 16
D	AWG number 8

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The entire band
B	The portion above 29.5 MHz
C	The portion between 28.1 MHz and 28.2 MHz
D	The portion between 28.3 MHz and 28.5 MHz

4. - G1B06

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

Select	Answer
A	Under no circumstances, FCC rules take priority
B	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
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	1000 watts PEP output
C	1500 watts PEP output
D	200 watts PEP output

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must be a resident of the US for a minimum of 5 years
B	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
C	The person’s home citizenship must be in ITU region 2
D	The person must hold an FCC granted amateur radio license of General class or above

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 2
B	Region 3
C	Region 1
D	Region 4

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Will you keep the frequency clear?”
B	“Are you busy?” or “Is this frequency in use?”
C	“Are you listening only for a specific station?”
D	“Are you operating full break-in?” or “Can you operate full break-in?”

11. - G2D07

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

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

12. - G2E07

Which of the following is required when using FT8?

Select	Answer
A	A vertically polarized antenna
B	Receiver attenuator set to -12 dB
C	Computer time accurate to within approximately 1 second
D	A special hardware modem

13. - G3A11

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

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are refracted and trapped in the ionosphere to circle Earth
C	They are refracted back to Earth
D	They are amplified by interaction with the ionosphere

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of temperature inversions
B	Because of the Doppler effect
C	Because it is the densest
D	Because it is the highest

16. - G4A06

What is the purpose of an antenna tuner?

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

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Linearity
B	Percentage of suppression of the carrier and undesired sideband for SSB
C	Percentage of frequency modulation
D	Percentage of carrier phase shift

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Building all equipment in a metal enclosure
B	Using surge suppressor power outlets
C	Placing low-pass filters on all feed lines
D	Bonding all equipment enclosures together

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 4 times
B	Approximately 1.5 times
C	Approximately 2 times
D	Approximately 8 times

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The socket’s wiring may be inadequate for the current drawn by the transceiver
B	The socket is not wired with an RF-shielded power cable
C	Drawing more than 50 watts from this socket could cause the engine to overheat
D	The DC polarity of the socket is reversed from the polarity of modern HF transceivers

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Susceptance
B	Conductance
C	Admittance
D	Reluctance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	20.6 percent
B	10.9 percent
C	25.9 percent
D	12.2 percent

23. - G5C12

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

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

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	Peak and valley current points
B	Saturation and cutoff
C	The active region (between cutoff and saturation)
D	Enhancement and depletion modes

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	RCA Phono
B	Type N
C	BNC
D	PL-259

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 7
B	Symbol 6
C	Symbol 11
D	Symbol 1

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To keep the carrier on frequency
B	To cut off the final amplifier during standby periods
C	To eliminate self-oscillations
D	To limit the modulation index

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Insertion loss
B	Q
C	Ultimate rejection
D	Return loss

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Frequency modulation
B	Single sideband
C	Phase modulation
D	Vestigial sideband

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Quadrature response
B	Image response
C	Intermediate interference
D	Mixer interference

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	FT8, FT4, and FST4
B	WSPR, MFSK16, and EasyPAL
C	DMR, D-STAR, and SystemFusion
D	Winlink, PACTOR II, and PACTOR III

32. - G9A06

In what units is RF feed line loss usually expressed?

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

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
B	If the antenna is too high, the pattern becomes unpredictable
C	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
D	Antenna height has no effect on the pattern

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

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying its body capacitance
B	By varying the base loading inductance
C	By extending and retracting the whip
D	By deploying a capacitance hat

Figure G7-1