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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	File an Environmental Impact Statement (EIS-97) with the FCC
B	All these choices are correct
C	Secure written permission from your neighbors to operate above the controlled MPE limits
D	Take action to prevent human exposure to the excessive RF fields

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	The generator must be insulated from ground
B	All these choices are correct
C	The generator should be operated in a well-ventilated area
D	Fuel should be stored near the generator for rapid refueling in case of an emergency

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	All these choices are correct
C	28.000 MHz to 28.025 MHz
D	21.275 MHz to 21.300 MHz

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	100 watts PEP output
B	20 watts PEP output
C	10 watts PEP output
D	200 watts PEP output

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third-party traffic
B	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
C	You must keep a record of the manufacturer of your equipment and the antenna used
D	You must keep a record of the date, time, frequency, power level, and stations worked

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	A special identifier is not required if their General class license application has been filed with the FCC
B	Whenever they operate on any amateur frequency
C	Whenever they operate using Technician frequency privileges
D	Whenever they operate using General class frequency privileges

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

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
B	Only one sideband and the carrier are transmitted; the other sideband is suppressed
C	Only one sideband is transmitted; the other sideband and carrier are suppressed
D	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands

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	Any control operator when normal communication systems are operational
C	Only a RACES net control operator
D	Only a person holding an FCC-issued amateur operator license

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Operating full break-in
B	No US stations should call
C	Closing station now
D	Listening only for a specific station or stations

11. - G2D09

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

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

12. - G2E08

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

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

13. - G3A13

What does the A-index measure?

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

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	The signal might be cancelled causing severe attenuation
B	Periodic fading approximately every 10 seconds
C	Signal strength increased by 3 dB
D	A slightly delayed echo might be heard

15. - G3C08

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

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

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Reduce the SWR in the feed line to the antenna
B	Increase power transfer from the transmitter to the feed line
C	Reduce the power dissipation in the feedline to the antenna
D	All these choices are correct

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	All these choices are correct
B	Receiver
C	Transmitter
D	Antenna and feed line

18. - G4C11

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

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

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.175 MHz to 7.178 MHz
B	7.178 MHz to 7.181 MHz
C	7.178 MHz to 7.184 MHz
D	7.1765 MHz to 7.1795 MHz

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

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Farad
B	Ampere
C	Ohm
D	Siemens

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	169.7 volts
B	339.4 volts
C	84.8 volts
D	240.0 volts

23. - G5C07

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

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

24. - G6A07

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

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

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	High power handling capability
B	Low power consumption
C	Better suited for power supply regulation
D	Better suited for RF amplification

26. - G7A03

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

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

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	8
B	3
C	16
D	6

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier gain
B	Input amplifier noise figure
C	All these choices are correct
D	Demodulator stage bandwidth

29. - G8A13

What is a link budget?

Select	Answer
A	The sum of antenna gains minus system losses
B	The sum of transmit power and antenna gains minus system losses as seen at the receiver
C	The difference between transmit power and receiver sensitivity
D	The financial costs associated with operating a radio link

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Quadrature response
B	Image response
C	Intermediate interference
D	Mixer interference

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	Encoding reverts to the default character set
B	The connection is dropped
C	Packets will be routed incorrectly
D	The checksum overflows

32. - G9A03

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

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

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength above ground
C	It steadily increases
D	It is unaffected by the height above ground

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	1 wavelength
B	3/4 wavelength
C	1/4 wavelength
D	1/2 wavelength

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