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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes the blood count to reach a dangerously low level
B	It cools body tissue
C	It heats body tissue
D	It causes radiation poisoning

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 12
B	AWG number 8
C	AWG number 16
D	AWG number 20

3. - G1A09

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

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

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	250 feet
B	50 feet
C	200 feet
D	100 feet

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. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least two Volunteer Examiners of Technician class or higher
B	At least three Volunteer Examiners of General class or higher
C	At least two Volunteer Examiners of General class or higher
D	At least three Volunteer Examiners of Technician class

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	No third-party traffic may be transmitted
B	The control operator of the interrogating station must hold an Amateur Extra class license
C	The station initiating the contact must be under local or remote control
D	The interrogating transmission must be made by another automatically controlled station

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

9. - G2B01

Which of the following is true concerning access to frequencies?

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

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	AR
B	SK
C	BK
D	KN

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Adam, Boy, Charles, David
B	Alpha, Bravo, Charlie, Delta
C	Able, Baker, Charlie, Dog
D	America, Boston, Canada, Denmark

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	All these choices are correct
B	Failure to establish a connection between stations
C	Frequent retries or timeouts
D	Long pauses in message transmission

13. - G3A04

Which of the following are the least reliable bands for long-distance communications during periods of low solar activity?

Select	Answer
A	30 meters and 20 meters
B	80 meters and 160 meters
C	60 meters and 40 meters
D	15 meters, 12 meters, and 10 meters

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just below the MUF
B	Just above the critical frequency
C	Just above the LUF
D	Just below the critical frequency

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Propagation near the MUF
B	Short distance MF or HF propagation at high elevation angles
C	Double hop propagation near the LUF
D	Long path HF propagation at sunrise and sunset

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Increase power transfer from the transmitter to the feed line
B	Reduce the power dissipation in the feedline to the antenna
C	Reduce the SWR in the feed line to the antenna
D	All these choices are correct

17. - G4B01

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

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

18. - G4C04

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

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

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

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To reduce the chance of damage if the antenna should strike an object
B	To reduce RF voltage discharge from the tip of the antenna while transmitting
C	To increase the “Q” of the antenna
D	To narrow the operating bandwidth of the antenna

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Ampere
C	Siemens
D	Farad

22. - G5B06

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

Select	Answer
A	1.4 watts
B	400 watts
C	353.5 watts
D	100 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	14.3 millihenries
B	7 millihenries
C	1,000 millihenries
D	70 millihenries

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	High capacitance for given volume
B	Comparatively low cost
C	High stability
D	Tight tolerance

25. - G6B11

What is an SMA connector?

Select	Answer
A	A connector designed for serial multiple access signals
B	A type-S to type-M adaptor
C	A small threaded connector suitable for signals up to several GHz
D	A type of push-on connector intended for high-voltage applications

26. - G7A02

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

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

27. - G7B06

What is a shift register?

Select	Answer
A	An array of operational amplifiers used for tri-state arithmetic operations
B	An analog mixer
C	A digital mixer
D	A clocked array of circuits that passes data in steps along the array

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in test gear to detect spurious mixing products
B	Used in an FM receiver to filter out unwanted sidebands
C	Used in a single sideband receiver to extract the modulated signal
D	Used in transmitter to perform frequency multiplication

29. - G8A14

What is link margin?

Select	Answer
A	Receiver sensitivity plus 3 dB
B	The opposite of fade margin
C	The difference between received power level and minimum required signal level at the input to the receiver
D	Transmit power minus receiver sensitivity

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

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

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Entire file received correctly
B	Receiving station connected and ready for transmissions
C	Packet was received without error
D	Request retransmission of the packet

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss increases SWR measured at the input to the line
B	Higher loss reduces SWR measured at the input to the line
C	Higher loss increases the accuracy of SWR measured at the input to the line
D	Transmission line loss does not affect the SWR measurement

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

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
B	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
C	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
D	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Directional receiving for MF and low HF bands
B	Portable direction finding at higher HF frequencies
C	Directional transmitting for low HF bands
D	Portable direction finding at lower HF frequencies