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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
B	Use an antenna with a higher front-to-back ratio
C	All these choices are correct
D	Change to a non-polarized antenna with higher gain

2. - G0B09

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

Select	Answer
A	The generator must be insulated from ground
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	All these choices are correct

3. - G1A09

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

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

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	10 watts PEP output
B	20 watts PEP output
C	200 watts PEP output
D	100 watts PEP output

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1200 watts PEP output
B	200 watts PEP output
C	1000 watts PEP output
D	1500 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	Those of both the remote station’s country and the FCC
B	Only those of the remote station’s country
C	Those of the remote station’s country and the FCC’s third-party regulations
D	Only those of the FCC

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 3
B	Region 4
C	Region 2
D	Region 1

8. - G2A11

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

Select	Answer
A	Any caller is welcome to respond
B	Only contest stations
C	Any stations outside the lower 48 states
D	Only stations in Germany

9. - G2B01

Which of the following is true concerning access to frequencies?

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

10. - G2C11

What does the Q signal “QRV” mean?

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

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	To help with a reply if the FCC requests information about your station
B	The FCC requires a log of all international third-party traffic
C	The FCC requires a log of all international contacts
D	The log provides evidence of operation needed to renew a license without retest

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	Terminal Node Controller
B	RJ-45
C	Gateway
D	Printer/Server

13. - G3A05

What is the solar flux index?

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

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Time of day and season
B	Path distance and location
C	Solar radiation and ionospheric disturbances
D	All these choices are correct

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The E region
B	The F2 region
C	The D region
D	The F1 region

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	CW signals may become severely attenuated
B	Received signals may become distorted
C	Received frequency may become unstable
D	Received frequency may shift several kHz

17. - G4B10

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

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

18. - G4C10

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

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

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.3455 MHz to 14.3485 MHz
B	14.347 MHz to 14.647 MHz
C	14.347 MHz to 14.350 MHz
D	14.344 MHz to 14.347 MHz

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 is not wired with an RF-shielded power cable
C	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
D	The socket’s wiring may be inadequate for the current drawn by the transceiver

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Resonance causes impedance to be very low
B	Impedance is equal to the arithmetic mean of the inductance and capacitance
C	Resonance causes impedance to be very high
D	Impedance is equal to the geometric mean of the inductance and capacitance

22. - G5B06

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

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

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Suppressor grid
B	Screen grid
C	Trigger electrode
D	Control grid

25. - G6B03

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

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

26. - G7A04

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

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

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	FM
B	SSB
C	AM
D	All these choices are correct

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Mixing products are greatly reduced
B	A wide range of filter bandwidths and shapes can be created
C	The DSP filter is much more effective at VHF frequencies
D	Fewer digital components are required

29. - G8A14

What is link margin?

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

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Local oscillator
B	RF input
C	Beat frequency oscillator
D	Image frequency

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	2.4 GHz
B	432 MHz
C	902 MHz
D	10.7 GHz

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The radius of the conductors and the frequency of the signal
B	The frequency of the signal and the length of the line
C	The distance between the centers of the conductors and the radius of the conductors
D	The distance between the centers of the conductors and the length of the line

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 ground losses
C	Shorter radials
D	Lower radiation resistance

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The number of directors versus the number of reflectors
C	The power radiated in the major lobe compared to that in the opposite direction
D	The relative position of the driven element with respect to the reflectors and directors

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

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