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

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	All these choices are correct
B	The generator should be operated in a well-ventilated area
C	Fuel should be stored near the generator for rapid refueling in case of an emergency
D	The generator must be insulated from ground

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The upper frequency portion
B	The lower frequency portion
C	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz
D	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The ITU
B	The control operator
C	The IEEE
D	The FCC

5. - G1C02

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

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Only those of the FCC
B	Those of both the remote station’s country and the FCC
C	Those of the remote station’s country and the FCC’s third-party regulations
D	Only those of the remote station’s country

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	Under no circumstances
B	When messages are encrypted
C	When messages are not encrypted
D	When under automatic control

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Less subject to interference from atmospheric static crashes
B	Ease of tuning on receive and immunity to impulse noise
C	Less bandwidth used and greater power efficiency
D	Very high-fidelity voice modulation

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Any control operator when normal communication systems are operational
B	Only a RACES net control operator
C	Only a person holding an FCC-issued amateur operator license
D	A person holding an FCC-issued amateur operator license or an appropriate government official

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	The fastest speed at which you are comfortable copying, but no faster than the CQ
B	At the standard calling speed of 10 wpm
C	At the standard calling speed of 5 wpm
D	The fastest speed at which you are comfortable copying, but no slower than the CQ

11. - G2D07

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

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

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	DSB
B	USB
C	SSB
D	LSB

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

14. - G3B03

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

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

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The F region is unstable during daylight hours
B	The D region absorbs signals at these frequencies during daylight hours
C	The E region is unstable during daylight hours
D	The F region absorbs signals at these frequencies during daylight hours

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	Interference from impulse noise will be eliminated
B	More stations can be accommodated within a given signal passband
C	It may be possible to reduce or eliminate interference from other signals
D	Accidental out-of-band operation can be prevented

17. - G4B01

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

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

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Using a balun to feed an unbalanced antenna
B	Not using a balun or line isolator to feed balanced antennas
C	Arcing at a poor electrical connection
D	Lack of rectification of the transmitter’s signal in power conductors

19. - G4D01

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

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

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The socket’s wiring may be inadequate for the current drawn by the transceiver
C	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
D	The socket is not wired with an RF-shielded power cable

21. - G5A10

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

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

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The peak value
B	The RMS value
C	The reciprocal of the RMS value
D	The peak-to-peak value

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	360 volts
B	120 volts
C	25.5 volts
D	40 volts

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	Saturation and cutoff
B	Peak and valley current points
C	Enhancement and depletion modes
D	The active region (between cutoff and saturation)

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A small bayonet connector used for data circuits
B	A low noise figure VHF connector
C	A moisture-resistant RF connector useful to 10 GHz
D	A nickel plated version of the PL-259

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 11
B	Symbol 5
C	Symbol 1
D	Symbol 4

27. - G7B06

What is a shift register?

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

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier noise figure
B	Demodulator stage bandwidth
C	Input amplifier gain
D	All these choices are correct

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Single sideband
C	Vestigial sideband
D	Frequency modulation

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Image response
B	Intermediate interference
C	Mixer interference
D	Quadrature response

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	Packets will be routed incorrectly
C	The checksum overflows
D	Encoding reverts to the default character set

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Using more transmitter power than the antenna can handle
B	Feeding the antenna with unbalanced feed line
C	A difference between feed line impedance and antenna feed point impedance
D	Operating an antenna at its resonant frequency

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter radials
B	Lower feed point impedance
C	Lower radiation resistance
D	Lower ground losses

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 1.5 dB higher
B	Approximately 3 dB higher
C	Approximately 9 dB higher
D	Approximately 6 dB higher

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

Figure G7-1