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. - G0A06

What must you do if your station fails to meet the FCC RF exposure exemption criteria?

Select	Answer
A	Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65
B	Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines
C	Contact the FCC for permission to transmit
D	Use an FCC-approved band-pass filter

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	Where the feed lines enter the building
B	In series with each ground lead
C	At the closest power pole ground electrode
D	On the antenna, opposite the feed point

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	7.125 MHz to 7.175 MHz
B	21.275 MHz to 21.300 MHz
C	All these choices are correct
D	28.000 MHz to 28.025 MHz

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 control operator
B	The IEEE
C	The FCC
D	The ITU

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	200 watts PEP output
D	An effective radiated power equivalent to 100 watts from a half-wave dipole

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

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	A system of propagation beacon stations operates on those frequencies
B	A system of automatic digital stations operates on those frequencies
C	These frequencies are set aside for emergency operations
D	These frequencies are set aside for bulletins from the FCC

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Frequency modulation
B	Single sideband
C	Double sideband
D	Single phase modulation

9. - G2B11

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

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

10. - G2C02

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

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

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Send a QSL card to the stations worked, or QSL via Logbook of The World
B	All these choices are correct
C	Identify your station according to normal FCC regulations
D	Submit a log to the contest sponsor

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	You may be listening on the wrong sideband
B	All these choices are correct
C	You may have selected the wrong baud rate
D	The mark and space frequencies may be reversed

13. - G3A12

What does the K-index measure?

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

14. - G3B11

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

Select	Answer
A	Propagation via ordinary skywave communications is not possible over that path
B	Double-hop propagation along the path is more common
C	HF communications over the path are enhanced
D	Propagation over the path on all HF frequencies is enhanced

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
C	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The long path azimuth of a distant station

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To balance the transmitter audio frequency response
C	To reduce harmonic radiation
D	To prevent excessive drive

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	Received power that interferes with SWR readings
B	Desensitization which can cause intermodulation products which interfere with impedance readings
C	Generation of harmonics which interfere with frequency readings
D	All these choices are correct

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It ensures that the neutral wire is grounded
B	It prevents a blown fuse in the event of an internal short circuit
C	It prevents signal overload
D	It ensures that hazardous voltages cannot appear on the chassis

19. - G4D04

What does an S meter measure?

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

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the alternator or generator using insulated heavy duty balanced transmission line
B	To the alternator or generator using heavy-gauge wire
C	To the battery using heavy-gauge wire
D	To the battery using insulated heavy duty balanced transmission line

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	Current and voltage are equal
B	Inductive reactance and capacitive reactance cancel
C	The circuit radiates all its energy in the form of radio waves
D	Resistance is cancelled

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	692 volts
B	173 volts
C	245 volts
D	346 volts

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	70 microfarads
B	1,000 microfarads
C	14.3 microfarads
D	0.07 microfarads

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Its reactance increases
B	It becomes capacitive
C	Harmonics are generated
D	Catastrophic failure is likely

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	Ferrites expel magnetic fields
B	By creating an impedance in the current’s path
C	By creating an out-of-phase current to cancel the common-mode current
D	It converts common-mode current to differential mode current

26. - G7A13

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

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

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

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

28. - G7C04

How is a product detector used?

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

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Single sideband
B	Vestigial sideband
C	Frequency modulation
D	Phase modulation

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Heterodyning
B	Rolloff
C	Detection
D	Intermodulation

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Receiving station connected and ready for transmissions
B	Request retransmission of the packet
C	Entire file received correctly
D	Packet was received without error

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. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a figure-eight off both ends of the antenna
B	It is a figure-eight at right angles to the antenna
C	It has a pair of lobes on one side of the antenna and a single lobe on the other side
D	It is a circle (equal radiation in all directions)

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBd is 1.25 dBd lower
B	Gain in dBi is 2.15 dB higher
C	Gain in dBd is 1.25 dBd higher
D	Gain in dBi is 2.15 dB lower

35. - G9D08

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

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

Figure G7-1