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

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	15 amperes
B	30 amperes
C	25 amperes
D	20 amperes

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	7.125 MHz to 7.175 MHz
B	21.275 MHz to 21.300 MHz
C	28.000 MHz to 28.025 MHz
D	All these choices are correct

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country
B	Only when the foreign country has a formal third-party agreement filed with the FCC
C	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
D	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	1500 watts PEP
B	10 watts RMS
C	ERP of 100 watts PEP with respect to an isotropic antenna
D	ERP of 100 watts PEP with respect to a dipole

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Technician only
B	None, only Amateur Extra class licensees may be accredited
C	General and Technician
D	Amateur Extra, General, and Technician

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 amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	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
D	They must relate to emergencies or disaster relief

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Antenna inductance or capacitance
B	Transmit audio or microphone gain
C	Attenuator level
D	RF clipping level

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	QSOs in progress have priority
C	Nets have priority
D	Contest operations should yield to non-contest use of frequencies

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	I am troubled by static
B	Send more slowly
C	Zero beat my signal
D	Stop sending

11. - G2D09

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

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

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Transmit a connect message on the station’s published frequency
B	Send an email to the system control operator
C	Send QRL in Morse code
D	Respond when the station broadcasts its SSID

13. - G3A13

What does the A-index measure?

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

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Use a network of automated receiving stations on the internet to see where your transmissions are being received
B	Send a series of dots and listen for echoes
C	All these choices are correct
D	Check the A-index

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Phone signals have high intelligibility
B	There are very large, sudden swings in signal strength
C	Scatter propagation occurs only at night
D	Signals have a fluttering sound

16. - G4A08

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

Select	Answer
A	Minimum plate current without exceeding maximum allowable grid current
B	Minimum SWR on the antenna
C	Desired power output without exceeding maximum allowable plate current
D	Highest plate voltage while minimizing grid current

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Receiver
B	Antenna and feed line
C	Transmitter
D	All these choices are correct

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Forward-biased diode
B	Reverse-biased diode
C	Bypass inductor
D	Bypass capacitor

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

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the alternator or generator using heavy-gauge wire
B	To the battery using insulated heavy duty balanced transmission line
C	To the alternator or generator using insulated heavy duty balanced transmission line
D	To the battery using heavy-gauge wire

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Siemens
C	Ampere
D	Farad

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	12.2 percent
B	25.9 percent
C	10.9 percent
D	20.6 percent

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	1,000 microfarads
B	14.3 microfarads
C	70 microfarads
D	0.07 microfarads

24. - G6A06

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

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

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Low power consumption
B	Better suited for power supply regulation
C	Better suited for RF amplification
D	High power handling capability

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	The output voltage is two times the peak input voltage
B	More current can be drawn from the half-wave rectifier
C	The ripple frequency is twice that of a full-wave rectifier
D	Only one diode is required

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	An amplifier in which the output preserves the input waveform
B	Any RF power amplifier used in conjunction with an amateur transceiver
C	An amplifier used as a frequency multiplier
D	A Class C high efficiency amplifier

28. - G7C08

Which parameter affects receiver sensitivity?

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

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

30. - G8B03

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

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

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Varicode
C	Viterbi
D	Binary

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	Operating an antenna at its resonant frequency
C	A difference between feed line impedance and antenna feed point impedance
D	Feeding the antenna with unbalanced feed line

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It must be longer than 1 wavelength
B	It is more effective on the lower HF bands than on the higher bands
C	Station equipment may carry significant RF current
D	It produces only vertically polarized radiation

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Resonant frequency is lower
B	Gain increases
C	Front-to-back ratio decreases
D	Beamwidth increases

35. - G9D09

What is the primary use of a Beverage antenna?

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