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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its frequency
B	Its duty cycle
C	All these choices are correct
D	Its power density

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	Fuel should be stored near the generator for rapid refueling in case of an emergency
B	The generator should be operated in a well-ventilated area
C	The generator must be insulated from ground
D	All these choices are correct

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	28.000 MHz to 28.025 MHz
B	7.125 MHz to 7.175 MHz
C	21.275 MHz to 21.300 MHz
D	All these choices are correct

4. - G1B04

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

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

5. - G1C05

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

Select	Answer
A	100 watts PEP output
B	1500 watts PEP output
C	1000 watts PEP output
D	2000 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	A license from the foreign country and a special remote station permit from the FCC
B	A US operator/primary station license
C	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
D	Only an appropriate US operator/primary license and a special remote station permit from the FCC

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When a station is transmitting spread spectrum emissions
B	All these choices are correct
C	When operating within one mile of an FCC Monitoring Station
D	When using a band where the Amateur Service is secondary

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

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

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Inform your local emergency coordinator
B	Immediately decrease power to avoid interfering with the station in distress
C	Acknowledge the station in distress and determine what assistance may be needed
D	Immediately cease all transmissions

10. - G2C02

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

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

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
B	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary
C	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
D	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary

12. - G2E15

Which of the following is a common location for FT8?

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

13. - G3A08

How can a geomagnetic storm affect HF propagation?

Select	Answer
A	Improve ground wave propagation
B	Degrade high-latitude HF propagation
C	Improve high-latitude HF propagation
D	Degrade ground wave propagation

14. - G3B09

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the F2 region?

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

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Ground waves are absorbing much of the signal
B	The E region is not present
C	The ionospheric region involved is unstable
D	Energy is scattered into the skip zone through several different paths

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier power supply to reach operating level
B	To prevent key clicks on CW
C	To prevent transient overmodulation
D	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Impedance of coaxial cable
B	Front-to-back ratio of an antenna
C	Gain of a directional antenna
D	Power output from a transmitter

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	On-and-off humming or clicking
B	Clearly audible speech
C	Distorted speech
D	A steady hum whenever the transmitter is on the air

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz above the edge of the segment
B	At least 3 kHz below the edge of the segment
C	At least 1 kHz above the edge of the segment
D	At least 1 kHz below the edge of the segment

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

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Reluctance
B	Reactance
C	Conductance
D	Admittance

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

Select	Answer
A	1500 watts
B	530 watts
C	2120 watts
D	1060 watts

23. - G5C12

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

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

24. - G6A07

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

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

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It discharges the filter capacitors when power is removed
B	It acts as a fuse for excess voltage
C	It removes shock hazards from the induction coils
D	It eliminates ground loop current

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Divide the RF output power by the DC input power
C	Divide the DC input power by the DC output power
D	Add the RF input power to the DC output power

28. - G7C07

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

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

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient bandwidth
B	Frequency drift
C	Insufficient audio
D	Excessive bandwidth

30. - G8B12

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

Select	Answer
A	Intermodulation
B	Detection
C	Rolloff
D	Heterodyning

31. - G8C10

How does forward error correction (FEC) allow the receiver to correct data errors?

Select	Answer
A	By using a parity bit with each character
B	By using the Varicode character set
C	By transmitting redundant information with the data
D	By controlling transmitter output power for optimum signal strength

32. - G9A06

In what units is RF feed line loss usually expressed?

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

33. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength from the end
C	It steadily increases
D	It is unaffected by the location of the feed point

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The magnitude of the maximum vertical angle of radiation
B	The direction of maximum radiated field strength from the antenna
C	The point of maximum current in a radiating antenna element
D	The maximum voltage standing wave point on a radiating element

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	On the same side as the feed point
B	Opposite the feed point
C	Omnidirectional in the plane of the halo
D	Broadside to the plane of the halo