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. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By measurement of field strength using calibrated equipment
B	By calculation based on FCC OET Bulletin 65
C	All these choices are correct
D	By calculation based on computer modeling

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	Where the feed lines enter the building
B	In series with each ground lead
C	At the closest power pole ground electrode
D	On the antenna, opposite the feed point

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	14250 kHz
B	18155 kHz
C	24900 kHz
D	21300 kHz

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	Automatic identification of repeaters
C	All these choices are correct
D	Transmission of bulletins of general interest to amateur radio licensees

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	RMS output from the transmitter
B	PEP input to the antenna
C	PEP output from the transmitter
D	RMS input to the antenna

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must be for other licensed amateurs
B	They must relate to emergencies or disaster relief
C	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
D	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log

8. - G2A02

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

Select	Answer
A	Suppressed sideband
B	Lower sideband
C	Double sideband
D	Upper 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	Approximately 6 kHz
B	2 kHz to 3 kHz
C	150 Hz to 500 Hz
D	5 Hz to 50 Hz

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Chirpy or unstable signal
B	100 percent copy
C	Report was read from an S meter rather than estimated
D	Key clicks

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	The FCC requires a log of all international third-party traffic
C	To help with a reply if the FCC requests information about your station
D	The log provides evidence of operation needed to renew a license without retest

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	A wireless network capable of both VHF and HF band operation
B	An amateur radio wireless network to send and receive email on the internet
C	A form of Packet Radio
D	All of the above

13. - G3A14

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

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

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are refracted back to Earth
B	They are refracted and trapped in the ionosphere to circle Earth
C	They are attenuated before reaching the destination
D	They pass through the ionosphere

15. - G3C04

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

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

16. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	The ALC action distorts the signal
B	ALC will invert the modulation of the AFSK mode
C	When using digital modes, too much ALC activity can cause the transmitter to overheat
D	All these choices are correct

17. - G4B12

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

Select	Answer
A	Desensitization which can cause intermodulation products which interfere with impedance readings
B	Received power that interferes with SWR 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	Solder flux will prevent a low conductivity connection
B	All these choices are correct
C	Solder has too high a dielectric constant to provide adequate lightning protection
D	A soldered joint will likely be destroyed by the heat of a lightning strike

19. - G4D10

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

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

20. - G4E07

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

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

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	All these choices are correct
B	A Pi-network
C	A transformer
D	A length of transmission line

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	2500 watts
B	8.75 watts
C	625 watts
D	5000 watts

23. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

Select	Answer
A	Displacement current coupling
B	Mutual inductance
C	Capacitive coupling
D	Mutual capacitance

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is separated from the channel by a thin insulating layer
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 source is formed by depositing metal on silicon

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	It converts common-mode current to differential mode current
B	By creating an out-of-phase current to cancel the common-mode current
C	By creating an impedance in the current’s path
D	Ferrites expel magnetic fields

26. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	360 degrees
B	270 degrees
C	180 degrees
D	90 degrees

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	FM
B	SSB
C	All these choices are correct
D	AM

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Cutoff and rolloff
B	Upper and lower half-power
C	Pole and zero
D	Image and harmonic

29. - G8A10

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

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

30. - G8B03

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

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

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	On and off
B	Dot and dash
C	High and low
D	Mark and space

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The antenna feed point must be at DC ground potential
B	The feed line must be an odd number of electrical quarter wavelengths long
C	The feed line must be an even number of physical half wavelengths long
D	The antenna feed point impedance must be matched to the characteristic impedance of the feed line

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Omnidirectional in azimuth
B	Bi-directional in azimuth
C	Hemispherical
D	Isotropic

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBi is 2.15 dB lower
B	Gain in dBd is 1.25 dBd higher
C	Gain in dBi is 2.15 dB higher
D	Gain in dBd is 1.25 dBd lower

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Lazy H
B	Sloper
C	Inverted L
D	Inverted V