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

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Electrical safety of the station
B	Acceptable modulation limits
C	Acceptable bandwidth limits
D	RF exposure limits of the human body

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 entire band
C	The portion above 29.5 MHz
D	The portion between 28.1 MHz and 28.2 MHz

4. - G1B06

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

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

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	2000 watts PEP output
D	1000 watts PEP output

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	General and Technician
B	Technician only
C	Amateur Extra, General, and Technician
D	None, only Amateur Extra class licensees may be accredited

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	A system of propagation beacon stations operates on those frequencies
B	A system of automatic digital stations operates on those frequencies
C	These frequencies are set aside for bulletins from the FCC
D	These frequencies are set aside for emergency operations

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

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

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	I am ready to receive
B	There is interference on the frequency
C	I am quitting for the day
D	You are sending too fast

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the angle at which an amateur satellite crosses the equator
B	A map that shows accurate land masses
C	A map that shows true bearings and distances from a specific location
D	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit

12. - G2E08

In what segment of the 20-meter band are most digital mode operations commonly found?

Select	Answer
A	In the middle of the CW segment, near 14.100 MHz
B	At the top of the SSB phone segment, near 14.325 MHz
C	Between 14.070 MHz and 14.100 MHz
D	At the bottom of the slow-scan TV segment, near 14.230 MHz

13. - G3A08

How can a geomagnetic storm affect HF propagation?

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

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	World-wide propagation during daylight hours
B	Heavy distortion on signals due to photon absorption
C	Poor propagation at any time of day
D	High levels of atmospheric noise or static

15. - G3C03

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

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

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

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	Received power that interferes with SWR readings
B	Desensitization which can cause intermodulation products which interfere with impedance readings
C	Generation of harmonics which interfere with frequency readings
D	All these choices are correct

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	A soldered joint will likely be destroyed by the heat of a lightning strike
B	Solder has too high a dielectric constant to provide adequate lightning protection
C	Solder flux will prevent a low conductivity connection
D	All these choices are correct

19. - G4D02

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

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

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

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	Z
B	X
C	Y
D	B

22. - G5B13

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

Select	Answer
A	2120 watts
B	530 watts
C	1060 watts
D	1500 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	144 to 1
B	12 to 1
C	3.5 to 1
D	24 to 1

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Harmonics are generated
B	Catastrophic failure is likely
C	Its reactance increases
D	It becomes capacitive

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Digital
B	Programmable Logic
C	MMIC
D	Analog

26. - G7A01

What is the function of a power supply bleeder resistor?

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

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is low when either or both inputs are high
B	Output is high when either or both inputs are low
C	Output is low only when both inputs are high
D	Output is high only when both inputs are high

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Fewer digital components are required
B	The DSP filter is much more effective at VHF frequencies
C	A wide range of filter bandwidths and shapes can be created
D	Mixing products are greatly reduced

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

Select	Answer
A	The transmitter’s carrier is properly suppressed
B	Signal distortion caused by excessive drive or speech levels
C	Signal distortion caused by insufficient collector current
D	The transmitter’s automatic level control (ALC) is properly adjusted

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	Some modes have high duty cycles that could exceed the transmitter’s average power rating
B	To aid in tuning your transmitter
C	To prevent overmodulation
D	To allow time for the other station to break in during a transmission

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 horizontal, signal strength is intensity, time is vertical
C	Frequency is vertical, signal strength is horizontal, time is intensity
D	Frequency is vertical, signal strength is intensity, time is horizontal

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	1:5
C	5:1
D	2:1

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	8 feet
B	21 feet
C	11 feet
D	16 feet

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	All these choices are correct
B	It is useful for matching multiband antennas
C	It does not require the driven element to be insulated from the boom
D	It does not require any inductors or capacitors

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Element length and spacing vary logarithmically along the boom
B	Impedance varies periodically as a function of frequency
C	SWR varies periodically as a function of boom length
D	Gain varies logarithmically as a function of frequency