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

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. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
C	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
D	Amateur stations may use the band only during emergencies

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be coordinated with the National Beacon Organization
B	No more than one beacon station may transmit in the same band from the same station location
C	All these choices are correct
D	The frequency must be posted on the internet or published in a national periodical

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	1000 watts PEP output
B	2000 watts PEP output
C	200 watts PEP output
D	1500 watts PEP output

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
B	Only an appropriate US operator/primary license and a special remote station permit from the FCC
C	A license from the foreign country and a special remote station permit from the FCC
D	A US operator/primary station license

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The control operator of the interrogating station must hold an Amateur Extra class license
B	The interrogating transmission must be made by another automatically controlled station
C	The station initiating the contact must be under local or remote control
D	No third-party traffic may be transmitted

8. - G2A05

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

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

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

10. - G2C10

What does the Q signal “QRN” mean?

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

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Toward the north
B	180 degrees from the station’s short-path heading
C	Along the gray line
D	Toward the rising sun

12. - G2E02

What is VARA?

Select	Answer
A	A low signal-to-noise digital mode used for EME (moonbounce)
B	A DX spotting system using a network of software defined radios
C	A radio direction finding system used on VHF and UHF
D	A digital protocol used with Winlink

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
B	A zero sunspot number indicates undisturbed conditions
C	A zero sunspot number indicates that radio propagation is not possible on any band
D	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies

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 back to Earth
C	They are amplified by interaction with the ionosphere
D	They are refracted and trapped in the ionosphere to circle Earth

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The F1 region
B	The D region
C	The F2 region
D	The E region

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To transmit on one frequency and listen on another
B	To allow transmitting on two frequencies at once
C	To improve frequency accuracy by allowing variable frequency output (VFO) operation
D	To permit full duplex operation -- that is, transmitting and receiving at the same time

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 testing logic circuits
C	When measuring the frequency of an oscillator
D	When high precision is desired

18. - G4C06

What is a possible effect of a resonant ground connection?

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

19. - G4D04

What does an S meter measure?

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

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the battery using heavy-gauge wire
B	To the alternator or generator using insulated heavy duty balanced transmission line
C	To the battery using insulated heavy duty balanced transmission line
D	To the alternator or generator using heavy-gauge wire

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A Pi-network
B	A transformer
C	All these choices are correct
D	A length of transmission line

22. - G5B06

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

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

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To improve the coupling between the primary and secondary
B	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
C	To prevent parasitic oscillations due to resistive losses in the primary
D	To accommodate the higher current of the primary

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.1 volt
B	1.0 volts
C	0.3 volts
D	0.7 volts

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	Reverse biased
C	In the tunnel-effect region
D	Forward biased

26. - G7A09

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

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

27. - G7B04

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

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

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	Filtering
C	Modulation
D	Detection

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is half the symbol rate
B	Symbol rate and bandwidth are not related
C	Higher symbol rates require wider bandwidth
D	Lower symbol rates require wider bandwidth

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	The connection is dropped
B	Encoding reverts to the default character set
C	The checksum overflows
D	Packets will be routed incorrectly

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation follows Marconi’s Law of Attenuation
B	Attenuation increases
C	Attenuation decreases
D	Attenuation is independent of frequency

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	Antenna height has no effect on the pattern
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	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
B	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
C	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
D	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It narrows the main lobe in azimuth
B	It allows simultaneous vertical and horizontal polarization
C	It allows quick selection of vertical or horizontal polarization
D	It narrows the main lobe in elevation

Figure G7-1