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. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
B	High duty cycle transmitters are exempt from RF exposure requirements
C	A lower duty cycle permits greater power levels to be transmitted
D	A higher duty cycle permits greater power levels to be transmitted

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the hot wires
B	Only the neutral wire
C	Only the ground wire
D	All wires

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	20 meters
B	160 meters
C	30 meters
D	12 meters

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	All these choices are correct
B	No more than one beacon station may transmit in the same band from the same station location
C	The frequency must be posted on the internet or published in a national periodical
D	The frequency must be coordinated with the National Beacon Organization

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	10 watts RMS
B	ERP of 100 watts PEP with respect to a dipole
C	1500 watts PEP
D	ERP of 100 watts PEP with respect to an isotropic antenna

6. - G1D11

What action is required to obtain a new General class license after a previously held license has expired and the two-year grace period has passed?

Select	Answer
A	There are no requirements other than being able to show a copy of the expired license
B	They must have a letter from the FCC showing they once held an amateur or commercial license
C	Contact the FCC to have the license reinstated
D	The applicant must show proof of the appropriate expired license grant and pass the current Element 2 exam

7. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Only in the non-phone Extra Class segments of the bands
B	Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands
C	On any band segment where digital operation is permitted
D	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per week
B	No more than 2 hours per month
C	No more than 1 hour per month
D	No more than 2 hours per week

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Chirpy or unstable signal
B	100 percent copy
C	Report was read from an S meter rather than estimated
D	Key clicks

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To allow each station to calibrate their frequency display
B	To be sure the contact will count for award programs
C	To allow each station to operate according to conditions
D	To follow standard radiogram structure

12. - G2E08

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

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

13. - G3A12

What does the K-index measure?

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

14. - G3B02

What factors affect the MUF?

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

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of temperature inversions
B	Because of the Doppler effect
C	Because it is the highest
D	Because it is the densest

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To remove interfering splatter generated by signals on adjacent frequencies
B	To eliminate receiver interference from impulse noise sources
C	To restrict the transmitter voice bandwidth
D	To reduce interference from carriers in the receiver passband

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of suppression of the carrier and undesired sideband for SSB
B	Linearity
C	Percentage of carrier phase shift
D	Percentage of frequency modulation

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	A steady hum whenever the transmitter is on the air
B	On-and-off humming or clicking
C	Clearly audible speech
D	Distorted speech

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 1 kHz above the edge of the segment
B	At least 3 kHz above the edge of the band
C	At least 3 kHz below the edge of the band
D	At least 1 kHz below the edge of the segment

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Short antennas are more likely to cause distortion of transmitted signals
B	Operating bandwidth may be very limited
C	Harmonic radiation may increase
D	Q of the antenna will be very low

21. - G5A01

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

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

22. - G5B14

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

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

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	67 ohms
B	75 ohms
C	300 ohms
D	150 ohms

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor’s internal capacitance would detune the circuit
B	The resistor’s tolerance value would not be adequate
C	The resistor could overheat
D	The resistor’s inductance could make circuit performance unpredictable

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	Programmable Logic
C	MMIC
D	Digital

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 7
B	Symbol 6
C	Symbol 1
D	Symbol 11

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

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

28. - G7C05

Which of the following is characteristic of a direct digital synthesizer (DDS)?

Select	Answer
A	Relatively high-power output
B	Pure sine wave output
C	Extremely narrow tuning range
D	Variable output frequency with the stability of a crystal oscillator

29. - G8A02

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

Select	Answer
A	Phase inversion
B	Phase modulation
C	Phase convolution
D	Phase transformation

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Higher symbol rates require wider bandwidth
B	Symbol rate and bandwidth are not related
C	Bandwidth is half the symbol rate
D	Lower symbol rates require wider bandwidth

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Directory
B	Header
C	Trailer
D	Preamble

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	1:5
C	2:1
D	5:1

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	132 feet
B	42 feet
C	84 feet
D	263 feet

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 9 dB higher
B	Approximately 3 dB higher
C	Approximately 6 dB higher
D	Approximately 1.5 dB higher

35. - G9D05

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

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

Figure G7-1