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

2. - G0B09

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

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

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The entire band
B	The portion between 28.1 MHz and 28.2 MHz
C	The portion between 28.3 MHz and 28.5 MHz
D	The portion above 29.5 MHz

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	100 feet
B	250 feet
C	50 feet
D	200 feet

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	56 kilobaud
B	19.6 kilobaud
C	300 baud
D	1200 baud

6. - G1D04

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

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

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 under automatic control
D	When messages are not encrypted

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

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

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	You are sending too fast
B	There is interference on the frequency
C	I am quitting for the day
D	I am ready to receive

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
B	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
C	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
D	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary

12. - G2E08

In what segment of the 20-meter band are most digital mode operations commonly found?

Select	Answer
A	In the middle of the CW segment, near 14.100 MHz
B	At the bottom of the slow-scan TV segment, near 14.230 MHz
C	Between 14.070 MHz and 14.100 MHz
D	At the top of the SSB phone segment, near 14.325 MHz

13. - G3A05

What is the solar flux index?

Select	Answer
A	A count of sunspots that is adjusted for solar emissions
B	A measure of solar radiation with a wavelength of 10.7 centimeters
C	Another name for the American sunspot number
D	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are refracted back to Earth
B	They pass through the ionosphere
C	They are attenuated before reaching the destination
D	They are refracted and trapped in the ionosphere to circle Earth

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal energy
B	Only a small part of the signal energy is scattered into the skip zone
C	Signals are scattered from the magnetosphere, which is not a good reflector
D	Propagation is via ducts in the F region, which absorb most of the energy

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	Automatic transmit/receive switching
B	Automatic generation of dots and dashes for CW operation
C	Computer interface for PSK and RTTY operation
D	To allow time for switching the antenna from the receiver to the transmitter

17. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Antenna front-to-back ratio
B	Radio wave propagation
C	Standing wave ratio
D	RF interference

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	You receive reports of harmonic interference from your station
C	The SWR reading for one or more antennas is suddenly very high
D	You receive reports of “hum” on your station’s transmitted signal

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	Increase transmitter bass response for more natural-sounding SSB signals
D	Prevent distortion of voice signals

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent discharge of the battery through the panel during times of low or no illumination
B	To prevent damage to the battery due to excessive voltage at high illumination levels
C	To limit the current flowing from the panel to a safe value
D	To prevent overload by regulating the charging voltage

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Reluctance
C	Admittance
D	Reactance

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 11 watts
B	Approximately 11 milliwatts
C	Approximately 61 milliwatts
D	Approximately 61 watts

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

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

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.1 volt
B	0.3 volts
C	1.0 volts
D	0.7 volts

25. - G6B03

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

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

26. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	270 degrees
B	180 degrees
C	90 degrees
D	360 degrees

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is low only when both inputs are high
B	Output is low when either or both inputs are high
C	Output is high only when both inputs are high
D	Output is high when either or both inputs are low

28. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

Select	Answer
A	Neper frequency
B	Rolloff frequency
C	Notch frequency
D	Cutoff frequency

29. - G8A13

What is a link budget?

Select	Answer
A	The sum of transmit power and antenna gains minus system losses as seen at the receiver
B	The sum of antenna gains minus system losses
C	The financial costs associated with operating a radio link
D	The difference between transmit power and receiver sensitivity

30. - G8B02

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

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

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Overmodulation
B	Long path propagation
C	Insufficient modulation
D	Backscatter propagation

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

33. - G9B01

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

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

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Larger-diameter elements
B	Closer element spacing
C	Loading coils in series with the element
D	Tapered-diameter elements

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 50 ohms
B	Approximately 300 ohms
C	Very high
D	Very low