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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	Only stations with antennas lower than one wavelength above the ground
B	All commercial stations; amateur radio stations are exempt
C	All stations with a time-averaged transmission of more than one milliwatt
D	Only stations transmitting more than 500 watts PEP

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To shut down the unit if it becomes too hot
C	To shut off the power supply if too much voltage is produced
D	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty

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

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	28.20 MHz to 28.30 MHz
B	21.08 MHz to 21.09 MHz
C	On any frequency if transmissions are in Morse code
D	On any frequency if power is less than 1 watt

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1500 watts PEP output
B	100 watts PEP output
C	1000 watts PEP output
D	2000 watts PEP output

6. - G1D02

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

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

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only during an FCC-declared general state of communications emergency
B	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
C	Only if the 10-meter repeater control operator holds at least a General class license
D	Under no circumstances

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say “QRZ” several times, followed by your call sign
B	Say your call sign once
C	Say “CQ” followed by the call sign of either station
D	Say “Breaker Breaker”

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan
B	Identify your station by transmitting your call sign at least 3 times
C	Listen on the frequency for at least two minutes to be sure it is clear
D	All these choices are correct

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Matching the speed of the transmitting station
B	Matching the transmit frequency to the frequency of a received signal
C	Operating split to avoid interference on frequency
D	Sending without error

11. - G2D07

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

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

12. - G2E07

Which of the following is required when using FT8?

Select	Answer
A	Receiver attenuator set to -12 dB
B	A vertically polarized antenna
C	A special hardware modem
D	Computer time accurate to within approximately 1 second

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Long term oscillations in the upper atmosphere
B	Cyclic variation in Earth’s radiation belts
C	The position of the Moon in its orbit
D	Rotation of the Sun’s surface layers around its axis

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	World-wide propagation during daylight hours
B	High levels of atmospheric noise or static
C	Heavy distortion on signals due to photon absorption
D	Poor propagation at any time of day

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The frequency at which the signal-to-noise ratio approaches unity
B	The frequency at which the signal-to-noise ratio is 6 dB
C	The lowest frequency which is refracted back to Earth
D	The highest frequency which is refracted back to Earth

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier power supply to reach operating level
B	To prevent transient overmodulation
C	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
D	To prevent key clicks on CW

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of carrier phase shift
B	Linearity
C	Percentage of suppression of the carrier and undesired sideband for SSB
D	Percentage of frequency modulation

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	A steady hum whenever the transmitter is on the air
B	On-and-off humming or clicking
C	Distorted speech
D	Clearly audible speech

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 2 times
B	Approximately 1.5 times
C	Approximately 8 times
D	Approximately 4 times

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ensure the battery is placed terminals-up
B	Ground the solar panel outer metal framework
C	A series resistor must be in place
D	The solar panel must have a charge controller

21. - G5A08

What is impedance?

Select	Answer
A	The product of current and reactance
B	The ratio of voltage to current
C	The product of current and voltage
D	The ratio of current to voltage

22. - G5B14

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

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

23. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

Select	Answer
A	An inductor in parallel
B	An inductor in series
C	A capacitor in series
D	A capacitor in parallel

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is separated from the drain by a thin insulating layer
B	The source is formed by depositing metal on silicon
C	The gate is separated from the channel by a thin insulating layer
D	The gate is formed by a back-biased junction

25. - G6B07

Which of the following describes a type N connector?

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

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 6
B	Symbol 1
C	Symbol 11
D	Symbol 7

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	8
B	6
C	3
D	16

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	All types of modulation can be created with appropriate processing
B	Minimum detectible signal level is reduced
C	Automatic conversion of the signal from digital to analog
D	The need for high resolution analog-to-digital converters is eliminated

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The bandwidth of the modulated signal
B	The waveform created by connecting the peak values of the modulated signal
C	Spurious signals that envelop nearby frequencies
D	The carrier frequency that contains the signal

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	All these choices are correct
B	2F1-F2
C	3F1-F2
D	5F1-3F2

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is intensity, time is vertical
B	Frequency is horizontal, signal strength is vertical, time is intensity
C	Frequency is vertical, signal strength is horizontal, time is intensity
D	Frequency is vertical, signal strength is intensity, time is horizontal

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation increases
B	Attenuation follows Marconi’s Law of Attenuation
C	Attenuation is independent of frequency
D	Attenuation decreases

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

34. - G9C04

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

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

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They have poor harmonic rejection
B	They must be used with an antenna tuner
C	They must be fed with open wire line
D	They present low impedance on all design frequencies

Figure G7-1