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 oscilloscope with a high-stability crystal marker generator
D	An SWR meter with a peak-reading function

2. - G0B13

Where should lightning arrestors be located?

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

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	18155 kHz
B	21300 kHz
C	14250 kHz
D	24900 kHz

4. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
B	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
C	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
D	Under no circumstances, FCC rules take priority

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	1200 baud
B	300 baud
C	56 kilobaud
D	19.6 kilobaud

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of General class or higher
B	At least two Volunteer Examiners of Technician class or higher
C	At least three Volunteer Examiners of Technician class
D	At least two Volunteer Examiners of General class or higher

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When messages are not encrypted
B	When under automatic control
C	Under no circumstances
D	When messages are encrypted

8. - G2A03

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

Select	Answer
A	Upper sideband
B	Suppressed sideband
C	Lower sideband
D	Double sideband

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	Approximately 6 kHz
C	2 kHz to 3 kHz
D	5 Hz to 50 Hz

10. - G2C02

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

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

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To be sure the contact will count for award programs
B	To follow standard radiogram structure
C	To allow each station to operate according to conditions
D	To allow each station to calibrate their frequency display

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide DX spotting reports to aid contesters and DXers
B	To provide high-speed data services during an emergency or community event
C	To provide real time propagation data by monitoring amateur radio transmissions worldwide
D	To provide FM repeater coverage in remote areas

13. - G3A13

What does the A-index measure?

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

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just above the LUF
B	Just below the MUF
C	Just below the critical frequency
D	Just above the critical frequency

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The F1 region
B	The D region
C	The F2 region
D	The E region

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	To allow time for switching the antenna from the receiver to the transmitter
B	Computer interface for PSK and RTTY operation
C	Automatic generation of dots and dashes for CW operation
D	Automatic transmit/receive switching

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of suppression of the carrier and undesired sideband for SSB
B	Percentage of frequency modulation
C	Percentage of carrier phase shift
D	Linearity

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	The ground rod is resonant
B	Flat braid rather than round wire has been used for the ground wire
C	Insulated wire has been used for the ground wire
D	The ground wire has high impedance on that frequency

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	All these choices are correct
B	Distorted speech
C	Excessive background noise
D	Excess intermodulation products

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

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Admittance
B	Conductance
C	Susceptance
D	Reluctance

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

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
B	To improve the coupling between the primary and secondary
C	To prevent parasitic oscillations due to resistive losses in the primary
D	To accommodate the higher current of the primary

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

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

25. - G6B11

What is an SMA connector?

Select	Answer
A	A connector designed for serial multiple access signals
B	A type-S to type-M adaptor
C	A small threaded connector suitable for signals up to several GHz
D	A type of push-on connector intended for high-voltage applications

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A sine wave at half the frequency of the AC input
B	A series of DC pulses at twice the frequency of the AC input
C	A steady DC voltage
D	A series of DC pulses at the same frequency as the AC input

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The inductance and capacitance in the tank circuit
B	The time delay of the lag circuit
C	The number of stages in the divider
D	The number of stages in the counter

28. - G7C05

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

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

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	Vestigial sideband
B	Amplitude compressed AM
C	8-tone frequency shift keying
D	8-bit direct sequence spread spectrum

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Second harmonics
B	Intercept point
C	Odd-order
D	Even-order

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Directory
B	Trailer
C	Header
D	Preamble

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The antenna feed point must be at DC ground potential
B	The feed line must be an odd number of electrical quarter wavelengths long
C	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
D	The feed line must be an even number of physical half wavelengths long

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	Shorter radials
D	Lower ground losses

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	It is useful for matching multiband antennas
B	It does not require the driven element to be insulated from the boom
C	It does not require any inductors or capacitors
D	All these choices are correct

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
B	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
C	A vertical dipole placed at approximately 1/2 wavelength above the ground
D	A horizontal dipole placed at approximately 1/2 wavelength above the ground