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

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	Bends in ground wires must be made as close as possible to a right angle
B	They must be bonded to all buried water and gas lines
C	They must be bonded together with all other grounds
D	Lightning grounds must be connected to all ungrounded wiring

3. - G1A10

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

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

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	All these choices are correct
B	The frequency must be posted on the internet or published in a national periodical
C	No more than one beacon station may transmit in the same band from the same station location
D	The frequency must be coordinated with the National Beacon Organization

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	56 kilobaud
B	1200 baud
C	300 baud
D	19.6 kilobaud

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

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D	The third party’s amateur license has been revoked and not reinstated

8. - G2A01

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

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

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	2 kHz to 3 kHz
C	Approximately 6 kHz
D	5 Hz to 50 Hz

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	I have received and understood
B	We have already confirmed the contact
C	Send slower
D	We have worked before

11. - G2D09

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

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

12. - G2E02

What is VARA?

Select	Answer
A	A radio direction finding system used on VHF and UHF
B	A low signal-to-noise digital mode used for EME (moonbounce)
C	A DX spotting system using a network of software defined radios
D	A digital protocol used with Winlink

13. - G3A13

What does the A-index measure?

Select	Answer
A	The relative position of sunspots on the surface of the Sun
B	The long-term stability of Earth’s geomagnetic field
C	The amount of polarization of the Sun’s electric field
D	The solar radio flux at Boulder, Colorado

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	HF communications over the path are enhanced
B	Double-hop propagation along the path is more common
C	Propagation via ordinary skywave communications is not possible over that path
D	Propagation over the path on all HF frequencies is enhanced

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
B	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
C	The long path azimuth of a distant station
D	The short path azimuth of a distant station

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	To allow time for switching the antenna from the receiver to the transmitter
B	Automatic transmit/receive switching
C	Computer interface for PSK and RTTY operation
D	Automatic generation of dots and dashes for CW operation

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the resolution of the readings
B	It allows for higher voltages to be safely measured
C	It improves the frequency response
D	It decreases the loading on circuits being measured

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	You receive reports of “hum” on your station’s transmitted signal
B	The SWR reading for one or more antennas is suddenly very high
C	You receive reports of harmonic interference from your station
D	An item of station equipment starts to draw excessive amounts of current

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Increase the apparent loudness of transmitted voice signals
B	Decrease high-frequency voice output to prevent out-of-band operation
C	Prevent distortion of voice signals
D	Increase transmitter bass response for more natural-sounding SSB signals

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

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	Y
B	B
C	X
D	Z

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	100 watts
B	400 watts
C	353.5 watts
D	1.4 watts

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	An inductor in parallel
C	A capacitor in parallel
D	An inductor in series

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is formed by depositing metal on silicon
B	The source is separated from the drain by a thin insulating layer
C	The gate is formed by a back-biased junction
D	The gate is separated from the channel by a thin insulating layer

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	Better suited for RF amplification
C	Better suited for power supply regulation
D	Low power consumption

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 eliminates ground loop current
C	It acts as a fuse for excess voltage
D	It discharges the filter capacitors when power is removed

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The inductance and capacitance in the tank circuit
B	The time delay of the lag circuit
C	The number of stages in the divider
D	The number of stages in the counter

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Double-sideband modulated RF
B	Frequency modulated RF
C	Audio extracted from the modulation signal
D	Audio with equalized frequency response

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The carrier frequency that contains the signal
B	Spurious signals that envelop nearby frequencies
C	The waveform created by connecting the peak values of the modulated signal
D	The bandwidth of the modulated signal

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Multiplier
B	Reactance modulator
C	Mixer
D	Balanced converter

31. - G8C16

Which of the following provide digital voice modes?

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

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The distance between the centers of the conductors and the length of the line
C	The radius of the conductors and the frequency of the signal
D	The frequency of the signal and the length of the line

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

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 9 dB higher
B	Approximately 3 dB higher
C	Approximately 6 dB higher
D	Approximately 1.5 dB higher

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	Broadside to the plane of the halo
C	Omnidirectional in the plane of the halo
D	Opposite the feed point