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	Its frequency
D	All these choices are correct

2. - G0B08

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

Select	Answer
A	All these choices are correct
B	Unground the base of the tower
C	Make sure all circuits that supply power to the tower are locked out and tagged
D	Notify the electric company that a person will be working on the tower

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	All HF bands
B	All HF bands except 160 meters and 10 meters
C	80 meters, 40 meters, 20 meters, and 15 meters
D	60 meters, 30 meters, 17 meters, and 12 meters

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	21.08 MHz to 21.09 MHz
B	On any frequency if power is less than 1 watt
C	On any frequency if transmissions are in Morse code
D	28.20 MHz to 28.30 MHz

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	1500 watts PEP output
B	50 watts PEP output
C	An effective radiated power equivalent to 100 watts from a half-wave dipole
D	200 watts PEP output

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	On any General or Technician class band segment
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	On any General or Technician class band segment except 30 meters and 60 meters
D	Only on the Technician band segments until you have a receipt for the FCC application fee payment

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	When messages are not encrypted
C	When messages are encrypted
D	Under no circumstances

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Acknowledge the station in distress and determine what assistance may be needed
B	Immediately cease all transmissions
C	Immediately decrease power to avoid interfering with the station in distress
D	Inform your local emergency coordinator

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Stop sending
B	Send more slowly
C	Zero beat my signal
D	I am troubled by static

11. - G2D02

Which of the following are objectives of the Volunteer Monitor Program?

Select	Answer
A	To provide emergency and public safety communications
B	To encourage amateur radio operators to self-regulate and comply with the rules
C	To conduct efficient and orderly amateur licensing examinations
D	To coordinate repeaters for efficient and orderly spectrum usage

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Call on any frequency in the waterfall except the station’s frequency
B	Find a clear frequency during the alternate time slot to the calling station
C	Find a clear frequency during the same time slot as the calling station
D	Always call on the station’s frequency

13. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of solar radiation with a wavelength of 10.7 centimeters
B	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
C	A count of sunspots that is adjusted for solar emissions
D	Another name for the American sunspot number

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 back to Earth
C	They are refracted and trapped in the ionosphere to circle Earth
D	They pass through the ionosphere

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Signals are scattered from the magnetosphere, which is not a good reflector
B	Only a small part of the signal energy is scattered into the skip zone
C	Propagation is via ducts in the F region, which absorb most of the energy
D	Propagation is via ground waves, which absorb most of the signal energy

16. - G4A01

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

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

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	A signal generator
B	An oscilloscope
C	An ammeter
D	An ohmmeter

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	The ground rod is resonant
B	Insulated wire has been used for the ground wire
C	The ground wire has high impedance on that frequency
D	Flat braid rather than round wire has been used for the ground wire

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	15 dB
B	12 dB
C	18 dB
D	6 dB

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Series-parallel
B	Bypass
C	Full-wave bridge
D	Shunt

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Admittance
B	Susceptance
C	Reluctance
D	Conductance

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	1.00
B	0.707
C	1.414
D	2.00

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	24 to 1
B	144 to 1
C	3.5 to 1
D	12 to 1

24. - G6A08

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

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

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A05

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

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

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	An amplifier in which the output preserves the input waveform
B	Any RF power amplifier used in conjunction with an amateur transceiver
C	A Class C high efficiency amplifier
D	An amplifier used as a frequency multiplier

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in test gear to detect spurious mixing products
B	Used in an FM receiver to filter out unwanted sidebands
C	Used in a single sideband receiver to extract the modulated signal
D	Used in transmitter to perform frequency multiplication

29. - G8A05

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

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

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Local oscillator
B	Beat frequency oscillator
C	RF input
D	Image frequency

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is vertical, signal strength is horizontal, time is intensity
B	Frequency is horizontal, signal strength is intensity, time is vertical
C	Frequency is horizontal, signal strength is vertical, time is intensity
D	Frequency is vertical, signal strength is intensity, time is horizontal

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	Omnidirectional in azimuth
B	Bi-directional in azimuth
C	Hemispherical
D	Isotropic

34. - G9C05

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

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

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By deploying a capacitance hat
B	By varying its body capacitance
C	By extending and retracting the whip
D	By varying the base loading inductance