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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Make sure the antenna is properly shielded
C	Locate the antenna close to your operating position to minimize feed-line radiation
D	Make sure that MPE limits are not exceeded in occupied areas

2. - G0B06

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

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

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	12 meters
B	160 meters
C	30 meters
D	17 meters

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 FCC
B	The IEEE
C	The control operator
D	The ITU

5. - G1C02

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

Select	Answer
A	50 watts PEP output
B	200 watts PEP output
C	An effective radiated power equivalent to 100 watts from a half-wave dipole
D	1500 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 except 30 meters and 60 meters
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	Only on the Technician band segments until you have a receipt for the FCC application fee payment
D	On any General or Technician class band segment

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	No third-party traffic may be transmitted
B	The interrogating transmission must be made by another automatically controlled station
C	The station initiating the contact must be under local or remote control
D	The control operator of the interrogating station must hold an Amateur Extra class license

8. - G2A12

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

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

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	2 kHz to 3 kHz
C	Approximately 6 kHz
D	5 Hz to 50 Hz

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	You are sending too fast
B	I am quitting for the day
C	There is interference on the frequency
D	I am ready to receive

11. - G2D10

What is QRP operation?

Select	Answer
A	Remote piloted model control
B	Transmission using Quick Response Protocol
C	Low-power transmit operation
D	Traffic relay procedure net operation

12. - G2E08

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

Select	Answer
A	In the middle of the CW segment, near 14.100 MHz
B	At the bottom of the slow-scan TV segment, near 14.230 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 solar radio flux at Boulder, Colorado
C	The relative position of sunspots on the surface of the Sun
D	The short-term stability of Earth’s geomagnetic field

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency for communications between two specific points
B	Lowest Usable Frequency during the past 60 minutes
C	Lowest Usable Frequency for communications to any point outside a 100-mile radius
D	The Lowest Usable Frequency during a 24-hour period

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	Propagation is via ground waves, which absorb most of the signal energy
C	Propagation is via ducts in the F region, which absorb most of the energy
D	Only a small part of the signal energy is scattered into the skip zone

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By temporarily increasing received bandwidth
B	By redirecting noise pulses into a filter capacitor
C	By clipping noise peaks
D	By reducing receiver gain during a noise pulse

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Less prone to overload
B	Better for measuring computer circuits
C	Faster response
D	Higher precision

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Connect the center conductor to the shield of all cables to short circuit the RFI signal
B	Place a ferrite choke on the cable
C	Add an additional insulating jacket to the cable
D	Ground the center conductor of the audio cable causing the interference

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 1.5 times
B	Approximately 4 times
C	Approximately 8 times
D	Approximately 2 times

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To limit the current flowing from the panel to a safe value
B	To prevent damage to the battery due to excessive voltage at high illumination levels
C	To prevent overload by regulating the charging voltage
D	To prevent discharge of the battery through the panel during times of low or no illumination

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Admittance
B	Conductance
C	Susceptance
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	400 watts
B	3200 watts
C	0.5 watts
D	200 watts

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	12 to 1
D	3.5 to 1

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.7 volts
B	0.3 volts
C	1.0 volts
D	0.1 volt

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	4 GHz
B	50 MHz
C	500 MHz
D	40 GHz

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 7
B	Symbol 6
C	Symbol 1
D	Symbol 4

27. - G7B10

Which of the following describes a linear amplifier?

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

28. - G7C05

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

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

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency transformation
B	Frequency convolution
C	Frequency conversion
D	Frequency 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	RF input
C	Image frequency
D	Beat frequency oscillator

31. - G8C15

What does an FT8 signal report of +3 mean?

Select	Answer
A	The signal is 3 dB over S9
B	The signal is S3 (weak signals)
C	The signal is 3 times the noise level of an equivalent SSB signal
D	The signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth

32. - G9A03

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

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

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower feed point impedance
B	Lower radiation resistance
C	Lower ground losses
D	Shorter radials

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	Gain increases
C	Resonant frequency is lower
D	Beamwidth increases

35. - G9D05

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

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

Figure G7-1