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 oscilloscope with a high-stability crystal marker generator
C	An SWR meter with a peak-reading function
D	A calibrated field strength meter with a calibrated antenna

2. - G0B06

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

Select	Answer
A	RF exposure limits of the human body
B	Acceptable bandwidth limits
C	Acceptable modulation limits
D	Electrical safety of the station

3. - G1A10

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

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

4. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
B	Under no circumstances, FCC rules take priority
C	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
D	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity

5. - G1C06

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

Select	Answer
A	200 watts PEP output
B	1500 watts PEP output
C	1000 watts PEP output
D	1200 watts PEP output

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Technician only
B	Amateur Extra, General, and Technician
C	None, only Amateur Extra class licensees may be accredited
D	General and Technician

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party is speaking in a language other than English
B	The third party’s amateur license has been revoked and not reinstated
C	All these choices are correct
D	The third party is not a US citizen

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Antenna inductance or capacitance
B	Transmit audio or microphone gain
C	RF clipping level
D	Attenuator level

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	A person holding an FCC-issued amateur operator license or an appropriate government official
B	Only a person holding an FCC-issued amateur operator license
C	Any control operator when normal communication systems are operational
D	Only a RACES net control operator

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Repeat everything twice
B	Increase your power
C	Change frequency
D	Send slower

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
B	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
C	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
D	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary

12. - G2E08

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

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

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

Select	Answer
A	28 days
B	1 to 2 hours
C	20 to 40 hours
D	8 minutes

14. - G3B02

What factors affect the MUF?

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

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The frequency at which the signal-to-noise ratio is 6 dB
B	The highest frequency which is refracted back to Earth
C	The frequency at which the signal-to-noise ratio approaches unity
D	The lowest frequency which is refracted back to Earth

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	Interference from impulse noise will be eliminated
B	Accidental out-of-band operation can be prevented
C	More stations can be accommodated within a given signal passband
D	It may be possible to reduce or eliminate interference from other signals

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Impedance of coaxial cable
B	Power output from a transmitter
C	Front-to-back ratio of an antenna
D	Gain of a directional antenna

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Bonding all equipment enclosures together
B	Placing low-pass filters on all feed lines
C	Using surge suppressor power outlets
D	Building all equipment in a metal enclosure

19. - G4D10

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

Select	Answer
A	At least 1 kHz below the edge of the segment
B	At least 3 kHz above the edge of the segment
C	At least 1 kHz above the edge of the segment
D	At least 3 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	Harmonic radiation may increase
B	Short antennas are more likely to cause distortion of transmitted signals
C	Q of the antenna will be very low
D	Operating bandwidth may be very limited

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Susceptance
B	Conductance
C	Admittance
D	Reluctance

22. - G5B03

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

Select	Answer
A	200 watts
B	0.5 watts
C	3200 watts
D	400 watts

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

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

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	Peak and valley current points
B	Enhancement and depletion modes
C	The active region (between cutoff and saturation)
D	Saturation and cutoff

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	BNC
B	PL-259
C	RCA Phono
D	Type N

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Synchronous
B	Full-wave
C	Half-wave
D	Full-wave bridge

27. - G7B11

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

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

28. - G7C07

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

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

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Phase modulation
B	Frequency modulation
C	Amplitude modulation
D	Power modulation

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?

Select	Answer
A	416.7 Hz
B	5 kHz
C	101.75 Hz
D	60 kHz

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters use longer Varicode bit sequences and thus slow down transmission
B	Error correction is used to ensure accurate message reception
C	Higher power is needed as compared to RTTY for similar error rates
D	Upper case letters are sent with more power

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	75 ohms
B	450 ohms
C	50 ohms
D	100 ohms

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It must be longer than 1 wavelength
B	It is more effective on the lower HF bands than on the higher bands
C	It produces only vertically polarized radiation
D	Station equipment may carry significant RF current

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Loading coils in series with the element
B	Larger-diameter elements
C	Closer element spacing
D	Tapered-diameter elements

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

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