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

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	All these choices are correct
B	Always hold on to the tower with one hand
C	Ensure that all heavy tools are securely fastened to the harness
D	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations may use the band only during emergencies
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
C	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
D	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	They may be used if they do not obscure the meaning of a message
B	They are limited to those expressly listed in Part 97 of the FCC rules
C	They are not permitted
D	Only “Q” signals are permitted

5. - G1C02

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

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	200 watts PEP output
C	1500 watts PEP output
D	50 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	None, only Amateur Extra class licensees may be accredited
B	Amateur Extra, General, and Technician
C	General and Technician
D	Technician only

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

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	Send slower
B	We have already confirmed the contact
C	I have received and understood
D	We have worked before

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

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Anywhere in the voice portion of the band
B	Approximately 14.074 MHz to 14.077 MHz
C	Anywhere in the CW portion of the band
D	Approximately 14.110 MHz to 14.113 MHz

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Long term oscillations in the upper atmosphere
B	The position of the Moon in its orbit
C	Rotation of the Sun’s surface layers around its axis
D	Cyclic variation in Earth’s radiation belts

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are refracted and trapped in the ionosphere to circle Earth
C	They are refracted back to Earth
D	They are attenuated before reaching the destination

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Scatter propagation occurs only at night
B	Signals have a fluttering sound
C	There are very large, sudden swings in signal strength
D	Phone signals have high intelligibility

16. - G4A03

How does a noise blanker work?

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

17. - G4B11

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

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

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	Distorted speech
B	Clearly audible speech
C	A steady hum whenever the transmitter is on the air
D	On-and-off humming or clicking

19. - G4D04

What does an S meter measure?

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

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

21. - G5A08

What is impedance?

Select	Answer
A	The product of current and reactance
B	The product of current and voltage
C	The ratio of current to voltage
D	The ratio of voltage to current

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It decreases as more parallel branches are added to the circuit
B	It equals the sum of the currents through each branch
C	It equals the average of the branch currents
D	It is the sum of the reciprocal of each individual voltage drop

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	33.3 microfarads
B	300 microfarads
C	0.33 microfarads
D	3.0 microfarads

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is formed by a back-biased junction
B	The source is separated from the drain by a thin insulating layer
C	The gate is separated from the channel by a thin insulating layer
D	The source is formed by depositing metal on silicon

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	The magnetic properties of the core may be optimized for a specific range of frequencies
B	Most of the magnetic field is contained in the core
C	Large values of inductance may be obtained
D	All these choices are correct

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Fewer circuit components are required
B	Inherently more stable
C	High-frequency operation allows the use of smaller components
D	Faster switching time makes higher output voltage possible

27. - G7B05

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

Select	Answer
A	3
B	8
C	16
D	6

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Carrier oscillator
B	IF amplifier
C	RF amplifier
D	Filter

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	It is sideband sensitive
B	Its bandwidth is approximately the same as BPSK31
C	All these choices are correct
D	Its encoding provides error correction

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	All these choices are correct
B	5F1-3F2
C	3F1-F2
D	2F1-F2

31. - G8C15

What does an FT8 signal report of +3 mean?

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

32. - G9A03

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

Select	Answer
A	75 ohms
B	100 ohms
C	50 ohms
D	450 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	Shorter radials
B	Lower ground losses
C	Lower feed point impedance
D	Lower radiation resistance

34. - G9C05

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

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

35. - G9D08

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

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