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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	All these choices are correct
B	Change to a non-polarized antenna with higher gain
C	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
D	Use an antenna with a higher front-to-back ratio

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 16
B	AWG number 20
C	AWG number 12
D	AWG number 8

3. - G1A10

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

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

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The IEEE
B	The ITU
C	The control operator
D	The FCC

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	1500 watts PEP output
D	200 watts PEP output

6. - G1D11

What action is required to obtain a new General class license after a previously held license has expired and the two-year grace period has passed?

Select	Answer
A	There are no requirements other than being able to show a copy of the expired license
B	They must have a letter from the FCC showing they once held an amateur or commercial license
C	The applicant must show proof of the appropriate expired license grant and pass the current Element 2 exam
D	Contact the FCC to have the license reinstated

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	100 watts
B	100 milliwatts
C	1500 watts
D	10 watts

8. - G2A05

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

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

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Listen for 2 minutes before calling CQ
B	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
C	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
D	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	AR
B	BK
C	KN
D	SK

11. - G2D10

What is QRP operation?

Select	Answer
A	Transmission using Quick Response Protocol
B	Remote piloted model control
C	Low-power transmit operation
D	Traffic relay procedure net operation

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	You may have selected the wrong baud rate
B	You may be listening on the wrong sideband
C	All these choices are correct
D	The mark and space frequencies may be reversed

13. - G3A14

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

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

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	180 miles
D	12,000 miles

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The D region absorbs signals at these frequencies during daylight hours
B	The F region absorbs signals at these frequencies during daylight hours
C	The F region is unstable during daylight hours
D	The E region is unstable during daylight hours

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	More stations can be accommodated within a given signal passband
B	It may be possible to reduce or eliminate interference from other signals
C	Interference from impulse noise will be eliminated
D	Accidental out-of-band operation can be prevented

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	A sidetone monitor
B	An oscilloscope
C	A wavemeter
D	A field strength meter

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	Flat braid rather than round wire has been used for the ground wire
B	The ground rod is resonant
C	Insulated wire has been used for the ground wire
D	The ground wire has high impedance on that frequency

19. - G4D11

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

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

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	FCC rules limiting mobile output power on the 75-meter band
B	Efficiency of the electrically short antenna
C	“Picket fencing”
D	The wire gauge of the DC power line to the transceiver

21. - G5A02

What is reactance?

Select	Answer
A	Reinforcement of the flow of direct current caused by resistance
B	Opposition to the flow of direct current caused by resistance
C	Opposition to the flow of alternating current caused by capacitance or inductance
D	Reinforcement of the flow of alternating current caused by capacitance or inductance

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The RMS value
B	The peak-to-peak value
C	The reciprocal of the RMS value
D	The peak value

23. - G5C07

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

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

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To reduce grid-to-plate capacitance
B	To increase the control grid resistance
C	To increase efficiency
D	To decrease plate resistance

25. - G6B11

What is an SMA connector?

Select	Answer
A	A type-S to type-M adaptor
B	A type of push-on connector intended for high-voltage applications
C	A small threaded connector suitable for signals up to several GHz
D	A connector designed for serial multiple access signals

26. - G7A09

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

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

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	An amplifier used as a frequency multiplier
B	An amplifier in which the output preserves the input waveform
C	Any RF power amplifier used in conjunction with an amateur transceiver
D	A Class C high efficiency amplifier

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	180 degrees
B	Zero
C	90 degrees
D	45 degrees

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Multiplex modulation
B	Amplitude modulation
C	Pulse modulation
D	Phase modulation

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Intercept point
B	Second harmonics
C	Odd-order
D	Even-order

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is vertical, time is intensity
B	Frequency is vertical, signal strength is horizontal, time is intensity
C	Frequency is vertical, signal strength is intensity, time is horizontal
D	Frequency is horizontal, signal strength is intensity, time is vertical

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss reduces SWR measured at the input to the line
B	Transmission line loss does not affect the SWR measurement
C	Higher loss increases SWR measured at the input to the line
D	Higher loss increases the accuracy of SWR measured at the input to the line

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	8 feet
B	16 feet
C	24 feet
D	33 feet

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Front-to-back ratio decreases
B	Beamwidth increases
C	Resonant frequency is lower
D	Gain increases

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They present low impedance on all design frequencies
B	They have poor harmonic rejection
C	They must be fed with open wire line
D	They must be used with an antenna tuner

Figure G7-1