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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	A receiver with digital signal processing (DSP) noise reduction
B	An oscilloscope with a high-stability crystal marker generator
C	An SWR meter with a peak-reading function
D	A calibrated field strength meter with a calibrated antenna

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Unground the base of the tower
B	Make sure all circuits that supply power to the tower are locked out and tagged
C	All these choices are correct
D	Notify the electric company that a person will be working on the tower

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations may use the band only during emergencies
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
C	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band

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. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	200 watts PEP output
B	1000 watts PEP output
C	1500 watts PEP output
D	1200 watts PEP output

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	There is no age limit
B	21 years
C	18 years
D	16 years

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. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Because it is fully compatible with an AM detector
C	Lower sideband is more efficient than upper sideband at these frequencies
D	It is commonly accepted amateur practice

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Nets have priority
B	Except during emergencies, no amateur station has priority access to any frequency
C	QSOs in progress have priority
D	Contest operations should yield to non-contest use of frequencies

10. - G2C03

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

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

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E02

What is VARA?

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

13. - G3A08

How can a geomagnetic storm affect HF propagation?

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

14. - G3B11

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

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

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The F1 region
B	The D region
C	The E region
D	The F2 region

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To prevent receiver overload from strong incoming signals
B	To reduce the transmitter power when driving a linear amplifier
C	To reduce excessive audio level on strong signals
D	To reduce power consumption when operating from batteries

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When high precision is desired
B	When testing logic circuits
C	When adjusting circuits for maximum or minimum values
D	When measuring the frequency of an oscillator

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	A CW signal at a nearly pure audio frequency
B	A chirpy CW signal
C	On-and-off humming or clicking
D	Severely distorted audio

19. - G4D11

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

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

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	The control computers
D	All these choices are correct

21. - G5A10

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

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

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

Select	Answer
A	Approximately 61 watts
B	Approximately 61 milliwatts
C	Approximately 11 milliwatts
D	Approximately 11 watts

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

Select	Answer
A	7 millihenries
B	70 millihenries
C	14.3 millihenries
D	1,000 millihenries

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor could overheat
B	The resistor’s internal capacitance would detune the circuit
C	The resistor’s tolerance value would not be adequate
D	The resistor’s inductance could make circuit performance unpredictable

25. - G6B10

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

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

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Capacitors and inductors
B	All these choices are correct
C	Transformers and transducers
D	Diodes

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC output power
B	Multiply the RF input power by the reciprocal of the RF output power
C	Add the RF input power to the DC output power
D	Divide the RF output power by the DC input power

28. - G7C02

What output is produced by a balanced modulator?

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

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	All these choices are correct
B	Its bandwidth is approximately the same as BPSK31
C	It is sideband sensitive
D	Its encoding provides error correction

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Second harmonics
B	Intercept point
C	Odd-order
D	Even-order

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	The connection is dropped
B	The checksum overflows
C	Encoding reverts to the default character set
D	Packets will be routed incorrectly

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	Between 1:1 and 5:1 depending on the characteristic impedance of the line
B	5:1
C	Between 1:1 and 5:1 depending on the reflected power at the transmitter
D	1:1

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
B	If the antenna is too high, the pattern becomes unpredictable
C	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
D	Antenna height has no effect on the pattern

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The point of maximum current in a radiating antenna element
B	The maximum voltage standing wave point on a radiating element
C	The magnitude of the maximum vertical angle of radiation
D	The direction of maximum radiated field strength from the antenna

35. - G9D12

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

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