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

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Current flowing from one or more of the hot wires directly to ground
B	Overvoltage on the hot wires
C	Current flowing from one or more of the hot wires to the neutral wire
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	7.125 MHz to 7.175 MHz
B	28.000 MHz to 28.025 MHz
C	All these choices are correct
D	21.275 MHz to 21.300 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	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. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	50 watts PEP output
C	200 watts PEP output
D	1500 watts PEP output

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	The Federal Communications Commission
C	A Volunteer Examiner Coordinator
D	The Wireless Telecommunications Bureau

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Under no circumstances
B	Only during an FCC-declared general state of communications emergency
C	Only if the 10-meter repeater control operator holds at least a General class license
D	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	An operator must activate a manual send/receive switch before and after every transmission
B	Automatic keyers, instead of hand keys, are used to send Morse code
C	Transmitting stations can receive between code characters and elements
D	Breaking stations send the Morse code prosign “BK”

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	All these choices are correct
B	Send a QSL card to the stations worked, or QSL via Logbook of The World
C	Submit a log to the contest sponsor
D	Identify your station according to normal FCC regulations

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

13. - G3A08

How can a geomagnetic storm affect HF propagation?

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

14. - G3B12

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

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

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Signals are scattered from the magnetosphere, which is not a good reflector
B	Propagation is via ducts in the F region, which absorb most of the energy
C	Propagation is via ground waves, which absorb most of the signal energy
D	Only a small part of the signal energy is scattered into the skip zone

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 permit full duplex operation -- that is, transmitting and receiving at the same time
D	To improve frequency accuracy by allowing variable frequency output (VFO) operation

17. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Antenna front-to-back ratio
B	Standing wave ratio
C	RF interference
D	Radio wave propagation

18. - G4C07

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

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

19. - G4D02

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

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

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The fuel delivery system
B	The battery charging system
C	All these choices are correct
D	The control computers

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reluctance
B	Reactance
C	Conductance
D	Admittance

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. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	3.0 microfarads
B	0.33 microfarads
C	300 microfarads
D	33.3 microfarads

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

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

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Programmable Logic
B	Digital
C	Analog
D	MMIC

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Fewer circuit components are required
B	High-frequency operation allows the use of smaller components
C	Inherently more stable
D	Faster switching time makes higher output voltage possible

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 only when both inputs are high
C	Output is high when either or both inputs are low
D	Output is low only when both inputs are high

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Notch depth
B	Insertion loss
C	Ultimate rejection
D	Rolloff

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase convolution
B	Phase transformation
C	Phase inversion
D	Phase modulation

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Heterodyning
B	Frequency inversion
C	Phase inversion
D	Synthesizing

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters are sent with more power
B	Upper case letters use longer Varicode bit sequences and thus slow down transmission
C	Error correction is used to ensure accurate message reception
D	Higher power is needed as compared to RTTY for similar error rates

32. - G9A05

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

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

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily decreases
B	It steadily increases
C	It peaks at about 1/8 wavelength above ground
D	It is unaffected by the height above ground

34. - G9C01

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

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

35. - G9D04

What is the primary function of antenna traps?

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