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US Amateur Radio - General (Element 3, 2019-2023) Practice Test

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1. - G0A04

What does "time averaging" mean in reference to RF radiation exposure?

SelectAnswer
AThe total time of the exposure
BThe total RF exposure averaged over a certain time
CThe average time it takes RF radiation to have any long-term effect on the body
DThe average amount of power developed by the transmitter over a specific 24-hour period

2. - G0B06

Which of the following is covered by the National Electrical Code?

SelectAnswer
AAcceptable bandwidth limits
BRF exposure limits of the human body
CAcceptable modulation limits
DElectrical safety inside the ham shack

3. - G1A09

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

SelectAnswer
A18155 kHz
B24900 kHz
C21300 kHz
D14250 kHz

4. - G1B04

Which of the following transmissions is permitted?

SelectAnswer
ARetransmission of other amateur station signals by any amateur station
BOccasional retransmission of weather and propagation forecast information from U.S. government stations
CCoded messages of any kind, if not intended to facilitate a criminal act
DUnidentified transmissions for test purposes only

5. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

SelectAnswer
A56 kilobaud
B1200 baud
C300 baud
D19.6 kilobaud

6. - G1D06

When must you add the special identifier "AG" after your call sign if you are a Technician class licensee and have a Certificate of Successful Completion of Examination (CSCE) for General class operator privileges, but the FCC has not yet posted your upgrade on its website?

SelectAnswer
AWhenever you operate on any amateur frequency
BWhenever you operate using Technician frequency privileges
CWhenever you operate using General class frequency privileges
DA special identifier is not required if your General class license application has been filed with the FCC

7. - G1E06

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

SelectAnswer
ARegion 3
BRegion 1
CRegion 2
DRegion 4

8. - G2A08

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

SelectAnswer
ASay your call sign once
BSay "Breaker Breaker"
CSay "CQ" followed by the call sign of either station
DSay "QRZ" several times, followed by your call sign

9. - G2B08

What is the voluntary band plan restriction for U.S. stations transmitting within the 48 contiguous states in the 50.1 to 50.125 MHz band segment?

SelectAnswer
AOnly contacts with other stations within the 48 contiguous states
BOnly digital contacts
COnly contacts with stations not within the 48 contiguous states
DOnly SSTV contacts

10. - G2C06

What does the term "zero beat" mean in CW operation?

SelectAnswer
AOperating split to avoid interference on frequency
BSending without error
CMatching the transmit frequency to the frequency of a received signal
DMatching the speed of the transmitting station

11. - G2D04

Which of the following describes an azimuthal projection map?

SelectAnswer
AA map that shows accurate land masses
BA map that shows true bearings and distances from a particular location
CA map that shows the angle at which an amateur satellite crosses the equator
DA map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit

12. - G2E02

How can a PACTOR modem or controller be used to determine if the channel is in use by other PACTOR stations?

SelectAnswer
APut the modem or controller in a mode which allows monitoring communications without a connection
BTransmit UI packets several times and wait to see if there is a response from another PACTOR station
CUnplug the data connector temporarily and see if the channel-busy indication is turned off
DSend the message, "Is this frequency in use?"

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

SelectAnswer
AOnly at the maximum point of the solar cycle
BAt the summer solstice
COnly at the minimum point of the solar cycle
DAt any point in the solar cycle

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

SelectAnswer
AHF communications over the path are enhanced
BNo HF radio frequency will support ordinary skywave communications over the path
CDouble hop propagation along the path is more common
DPropagation over the path on all HF frequencies is enhanced

15. - G3C09

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

SelectAnswer
AScatter
BFaraday rotation
CShort-path
DChordal hop

16. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

SelectAnswer
ANo change will be observed
BA slow, rhythmic oscillation
CA pronounced dip
DA pronounced peak

17. - G4B15

What type of transmitter performance does a two-tone test analyze?

SelectAnswer
APercentage of suppression of carrier and undesired sideband for SSB
BPercentage of carrier phase shift
CLinearity
DPercentage of frequency modulation

18. - G4C07

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

SelectAnswer
ASolder flux will prevent a low conductivity connection
BSolder has too high a dielectric constant to provide adequate lightning protection
CThe resistance of solder is too high
DA soldered joint will likely be destroyed by the heat of a lightning strike

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?

SelectAnswer
AApproximately 4 times
BApproximately 1.5 times
CApproximately 2 times
DApproximately 8 times

20. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

SelectAnswer
AThe socket is not wired with an RF-shielded power cable
BThe DC polarity of the socket is reversed from the polarity of modern HF transceivers
CDrawing more than 50 watts from this socket could cause the engine to overheat
DThe socket's wiring may be inadequate for the current drawn by the transceiver

21. - G5A08

What is one reason to use an impedance matching transformer?

SelectAnswer
ATo minimize transmitter power output
BTo minimize radiation resistance
CTo maximize the transfer of power
DTo reduce power supply ripple

22. - G5B03

How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load?

SelectAnswer
A400 watts
B3200 watts
C0.5 watts
D200 watts

23. - G5C05

If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

SelectAnswer
A1500 ohms
B90 ohms
C175 ohms
D150 ohms

24. - G6A04

Which of the following is an advantage of an electrolytic capacitor?

SelectAnswer
AMuch less leakage than any other type
BInexpensive RF capacitor
CHigh capacitance for a given volume
DTight tolerance

25. - G6B13

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

SelectAnswer
ADB-25
BOctal
CPL-259
DRJ-11

26. - G7A01

What useful feature does a power supply bleeder resistor provide?

SelectAnswer
AIt eliminates ground loop current
BIt removes shock hazards from the induction coils
CIt ensures that the filter capacitors are discharged when power is removed
DIt acts as a fuse for excess voltage

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

SelectAnswer
AA circulator and a filter operating in a feed-forward loop
BA frequency multiplier and a mixer
CAn amplifier and a divider
DA filter and an amplifier operating in a feedback loop

28. - G7C16

Which of the following is a typical application for a Direct Digital Synthesizer?

SelectAnswer
AA digital mode interface between a computer and a transceiver
BA high-stability variable frequency oscillator in a transceiver
CA high-sensitivity radio direction finder
DA digital voltmeter

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

SelectAnswer
APhase modulation
BPhase transformation
CPhase convolution
DPhase inversion

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

SelectAnswer
A60 kHz
B416.7 Hz
C101.75 Hz
D5 kHz

31. - G8C01

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

SelectAnswer
A2.4 GHz
B432 MHz
C10.7 GHz
D902 MHz

32. - G9A07

What must be done to prevent standing waves on an antenna feed line?

SelectAnswer
AThe feed line must be cut to a length equal to an odd number of electrical quarter wavelengths
BThe antenna feed point impedance must be matched to the characteristic impedance of the feed line
CThe antenna feed point must be at DC ground potential
DThe feed line must be cut to a length equal to an even number of physical half wavelengths

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

SelectAnswer
AAs high as possible above the ground
BOn the surface of the Earth or buried a few inches below the ground
CParallel to the antenna element
DAt the center of the antenna

34. - G9C15

What is meant by the terms dBi and dBd when referring to antenna gain?

SelectAnswer
AdBi refers to an isometric antenna, dBd refers to a discone antenna
BdBi refers to an isotropic antenna, dBd refers to a dipole antenna
CdBi refers to an inverted-vee antenna, dBd refers to a downward reflecting antenna
DdBi refers to an ionospheric reflecting antenna, dBd refers to a dissipative antenna

35. - G9D08

How does a "screwdriver" mobile antenna adjust its feed-point impedance?

SelectAnswer
ABy varying the base loading inductance
BBy varying its body capacitance
CBy deploying a capacitance hat
DBy extending and retracting the whip