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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	File an Environmental Impact Statement (EIS-97) with the FCC
B	Secure written permission from your neighbors to operate above the controlled MPE limits
C	All these choices are correct
D	Take action to prevent human exposure to the excessive RF fields

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	20 amperes
B	30 amperes
C	25 amperes
D	15 amperes

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	12 meters
C	30 meters
D	20 meters

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	Under no circumstances, FCC rules take priority
C	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
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. - 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. - 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	Only an appropriate US operator/primary license and a special remote station permit from the FCC
C	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
D	A US operator/primary station license

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party is not a US citizen
B	The third party’s amateur license has been revoked and not reinstated
C	The third party is speaking in a language other than English
D	All these choices are correct

8. - G2A02

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

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

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	3 kHz to 6 kHz
C	5 Hz to 50 Hz
D	1 kHz to 3 kHz

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Closing station now
C	No US stations should call
D	Operating full break-in

11. - G2D10

What is QRP operation?

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

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Call on any frequency in the waterfall except the station’s frequency
B	Always call on the station’s frequency
C	Find a clear frequency during the alternate time slot to the calling station
D	Find a clear frequency during the same time slot as the calling station

13. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
B	A measure of solar radiation with a wavelength of 10.7 centimeters
C	Another name for the American sunspot number
D	A count of sunspots that is adjusted for solar emissions

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency during a 24-hour period
B	The Lowest Usable Frequency for communications between two specific points
C	Lowest Usable Frequency for communications to any point outside a 100-mile radius
D	Lowest Usable Frequency during the past 60 minutes

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	There are very large, sudden swings in signal strength
B	Scatter propagation occurs only at night
C	Signals have a fluttering sound
D	Phone signals have high intelligibility

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 transient overmodulation
C	To prevent key clicks on CW
D	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	A signal generator
B	An oscilloscope
C	An ammeter
D	An ohmmeter

18. - G4C07

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

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

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.1765 MHz to 7.1795 MHz
B	7.178 MHz to 7.181 MHz
C	7.178 MHz to 7.184 MHz
D	7.175 MHz to 7.178 MHz

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent overload by regulating the charging voltage
B	To prevent discharge of the battery through the panel during times of low or no illumination
C	To limit the current flowing from the panel to a safe value
D	To prevent damage to the battery due to excessive voltage at high illumination levels

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Siemens
B	Farad
C	Ampere
D	Ohm

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	339.4 volts
B	240.0 volts
C	84.8 volts
D	169.7 volts

23. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

Select	Answer
A	A capacitor in series
B	A capacitor in parallel
C	An inductor in parallel
D	An inductor in series

24. - G6A11

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

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

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	High power handling capability
B	Low power consumption
C	Better suited for power supply regulation
D	Better suited for RF amplification

26. - G7A09

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

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

27. - G7B04

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

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

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Detection
B	Modulation
C	Filtering
D	All these choices are correct

29. - G8A04

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

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

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The sum and difference
B	The average
C	The arithmetic product
D	The ratio

31. - G8C16

Which of the following provide digital voice modes?

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

32. - G9A05

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

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

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

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Larger-diameter elements
B	Loading coils in series with the element
C	Tapered-diameter elements
D	Closer element spacing

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To notch spurious frequencies
B	To prevent out-of-band operation
C	To provide balanced feed point impedance
D	To enable multiband operation

Figure G7-1