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

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	As close to the station equipment as possible
B	Outside the building
C	Next to the closest power pole
D	Parallel to the water supply line

3. - G1A10

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

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

4. - G1B10

What is the power limit for beacon stations?

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

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	RMS input to the antenna
B	RMS output from the transmitter
C	PEP output from the transmitter
D	PEP input to the antenna

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	Whenever they operate using Technician frequency privileges
B	A special identifier is not required if their General class license application has been filed with the FCC
C	Whenever they operate using General class frequency privileges
D	Whenever they operate on any amateur frequency

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 1
D	Region 2

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single sideband
B	Double sideband
C	Frequency modulation
D	Single phase modulation

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Switch to the opposite sideband
B	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
C	Advise the interfering stations that you are on the frequency and that you have priority
D	Decrease power and continue to transmit

10. - G2C05

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

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

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
B	Amateur volunteers who conduct amateur licensing examinations
C	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
D	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency

12. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Joining an existing contact is not possible, PACTOR connections are limited to two stations
B	Send a NAK code
C	Transmit a steady carrier until the PACTOR protocol times out and disconnects
D	Send broadcast packets containing your call sign while in MONITOR mode

13. - G3A12

What does the K-index measure?

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are amplified by interaction with the ionosphere
B	They are refracted and trapped in the ionosphere to circle Earth
C	They are refracted back to Earth
D	They pass through the ionosphere

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Short-path
B	Faraday rotation
C	Scatter
D	Chordal hop

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	No change will be observed
B	A slow, rhythmic oscillation
C	A pronounced peak
D	A pronounced dip

17. - G4B11

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

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

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	You receive reports of harmonic interference from your station
C	The SWR reading for one or more antennas is suddenly very high
D	An item of station equipment starts to draw excessive amounts of current

19. - G4D04

What does an S meter measure?

Select	Answer
A	Impedance
B	Transmitter power output
C	Carrier suppression
D	Received signal strength

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The fuel delivery system
B	The battery charging system
C	All these choices are correct
D	The control computers

21. - G5A10

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

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

22. - G5B14

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

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

23. - G5C12

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

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

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	High stability
C	Comparatively low cost
D	High capacitance for given volume

25. - G6B07

Which of the following describes a type N connector?

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

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 1
B	Symbol 7
C	Symbol 2
D	Symbol 11

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class AB
B	Class C
C	Class B
D	Class A

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Insertion loss
B	Return loss
C	Q
D	Ultimate rejection

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

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	Mixer interference
C	Quadrature response
D	Intermediate interference

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	FT8
B	AMTOR
C	MSK144
D	MFSK32

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

34. - G9C05

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

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

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Gain varies logarithmically as a function of frequency
B	Impedance varies periodically as a function of frequency
C	Element length and spacing vary logarithmically along the boom
D	SWR varies periodically as a function of boom length

Figure G7-1