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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	A receiver with digital signal processing (DSP) noise reduction
B	An SWR meter with a peak-reading function
C	An oscilloscope with a high-stability crystal marker generator
D	A calibrated field strength meter with a calibrated antenna

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Notify the electric company that a person will be working on the tower
B	Unground the base of the tower
C	Make sure all circuits that supply power to the tower are locked out and tagged
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	18155 kHz
B	14250 kHz
C	24900 kHz
D	21300 kHz

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The FCC
B	The IEEE
C	The control operator
D	The ITU

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	2.8 kHz
B	1.8 kHz
C	5.6 kHz
D	3 kHz

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must be a resident of the US for a minimum of 5 years
B	The person’s home citizenship must be in ITU region 2
C	The person must hold an FCC granted amateur radio license of General class or above
D	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner

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	When under automatic control
B	Under no circumstances
C	When messages are encrypted
D	When messages are not encrypted

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	It is commonly accepted amateur practice
B	Lower sideband is more efficient than upper sideband at these frequencies
C	Lower sideband is the only sideband legal on these frequency bands
D	Because it is fully compatible with an AM detector

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	5 Hz to 50 Hz
C	1 kHz to 3 kHz
D	3 kHz to 6 kHz

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Operating full break-in
B	Listening only for a specific station or stations
C	No US stations should call
D	Closing station now

11. - G2D10

What is QRP operation?

Select	Answer
A	Transmission using Quick Response Protocol
B	Traffic relay procedure net operation
C	Remote piloted model control
D	Low-power transmit operation

12. - G2E10

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

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

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

Select	Answer
A	28 days
B	14 days
C	15 hours to several days
D	4 to 8 minutes

14. - G3B02

What factors affect the MUF?

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

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The E region is unstable during daylight hours
B	The F region is unstable during daylight hours
C	The D region absorbs signals at these frequencies during daylight hours
D	The F region absorbs signals at these frequencies during daylight hours

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To permit full duplex operation -- that is, transmitting and receiving at the same time
B	To transmit on one frequency and listen on another
C	To improve frequency accuracy by allowing variable frequency output (VFO) operation
D	To allow transmitting on two frequencies at once

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	All these choices are correct
C	Transmitter
D	Antenna and feed line

18. - G4C01

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

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

19. - G4D04

What does an S meter measure?

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

20. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.02 VDC
B	0.2 VDC
C	0.5 VDC
D	1.38 VDC

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reluctance
B	Admittance
C	Reactance
D	Conductance

22. - G5B06

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

Select	Answer
A	353.5 watts
B	400 watts
C	1.4 watts
D	100 watts

23. - G5C14

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

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

24. - G6A09

Which of the following describes MOSFET construction?

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

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	In the tunnel-effect region
B	Reverse biased
C	At the Zener voltage
D	Forward biased

26. - G7A05

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

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

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	50%
B	Less than 50%
C	100%
D	More than 50% but less than 100%

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	RF amplifier
B	Filter
C	IF amplifier
D	Carrier oscillator

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency convolution
B	Frequency transformation
C	Frequency conversion
D	Frequency modulation

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To allow time for the other station to break in during a transmission
B	Some modes have high duty cycles that could exceed the transmitter’s average power rating
C	To aid in tuning your transmitter
D	To prevent overmodulation

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	WSPR, MFSK16, and EasyPAL
B	FT8, FT4, and FST4
C	Winlink, PACTOR II, and PACTOR III
D	DMR, D-STAR, and SystemFusion

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

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Hemispherical
B	Isotropic
C	Bi-directional in azimuth
D	Omnidirectional in azimuth

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The number of elements on the boom
B	The spacing of each element along the boom
C	All these choices are correct
D	The physical length of the boom

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It narrows the main lobe in azimuth
B	It allows quick selection of vertical or horizontal polarization
C	It allows simultaneous vertical and horizontal polarization
D	It narrows the main lobe in elevation