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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	A calibrated field strength meter with a calibrated antenna
B	A receiver with digital signal processing (DSP) noise reduction
C	An SWR meter with a peak-reading function
D	An oscilloscope with a high-stability crystal marker generator

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut off the power supply if too much voltage is produced
B	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
C	To ensure that dangerous voltages are removed if the cabinet is opened
D	To shut down the unit if it becomes too hot

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.000 MHz to 28.300 MHz only
B	The entire band
C	28.000 MHz to 28.025 MHz only
D	28.025 MHz to 28.300 MHz only

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

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

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	5.6 kHz
B	2.8 kHz
C	3 kHz
D	1.8 kHz

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Technician only
B	General and Technician
C	Amateur Extra, General, and Technician
D	None, only Amateur Extra class licensees may be accredited

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	Channels 42 through 45
B	Channels 1 through 4
C	No part
D	Anywhere in the band

8. - G2A05

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

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

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	Have a backup frequency in case of interference or poor conditions
B	All these choices are correct
C	Always use multiple sets of phonetics during check-in
D	Transmit the full net roster at the beginning of every session

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Are you busy?” or “Is this frequency in use?”
B	“Are you listening only for a specific station?”
C	“Will you keep the frequency clear?”
D	“Are you operating full break-in?” or “Can you operate full break-in?”

11. - G2D02

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

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

12. - G2E08

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

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

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A sudden drop in the solar flux index
B	Ripples in the geomagnetic force
C	A temporary disturbance in Earth’s geomagnetic field
D	A thunderstorm that affects radio propagation

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. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of the Doppler effect
B	Because of temperature inversions
C	Because it is the highest
D	Because it is the densest

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce the transmitter power when driving a linear amplifier
B	To prevent receiver overload from strong incoming signals
C	To reduce power consumption when operating from batteries
D	To reduce excessive audio level on strong signals

17. - G4B11

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

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

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Bypass inductor
B	Reverse-biased diode
C	Bypass capacitor
D	Forward-biased diode

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 10 times less powerful
B	It is 100 times more powerful
C	It is 20 times less powerful
D	It is 20 times more powerful

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To increase the “Q” of the antenna
B	To reduce RF voltage discharge from the tip of the antenna while transmitting
C	To reduce the chance of damage if the antenna should strike an object
D	To narrow the operating bandwidth of the antenna

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Farad
B	Siemens
C	Ohm
D	Ampere

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The RMS value
B	The reciprocal of the RMS value
C	The peak-to-peak value
D	The peak value

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	360 volts
B	40 volts
C	120 volts
D	25.5 volts

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	Much less leakage than any other type
B	Inexpensive RF capacitor
C	Tight tolerance
D	High capacitance for a given volume

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A nickel plated version of the PL-259
B	A small bayonet connector used for data circuits
C	A low noise figure VHF connector
D	A moisture-resistant RF connector useful to 10 GHz

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It discharges the filter capacitors when power is removed
B	It acts as a fuse for excess voltage
C	It eliminates ground loop current
D	It removes shock hazards from the induction coils

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is high when either or both inputs are low
B	Output is low when either or both inputs are high
C	Output is low only when both inputs are high
D	Output is high only when both inputs are high

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Modulation
B	Filtering
C	All these choices are correct
D	Detection

29. - G8A14

What is link margin?

Select	Answer
A	The difference between received power level and minimum required signal level at the input to the receiver
B	Transmit power minus receiver sensitivity
C	Receiver sensitivity plus 3 dB
D	The opposite of fade margin

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Multiplier
B	Balanced converter
C	Mixer
D	Reactance modulator

31. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	SSB-SC
B	PSK31
C	MFSK16
D	WSPR

32. - G9A03

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

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

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
B	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
C	If the antenna is too high, the pattern becomes unpredictable
D	Antenna height has no effect on the pattern

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

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Wide bandwidth
B	Polarization diversity
C	Harmonic suppression
D	Higher gain per element than a Yagi antenna