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

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Lead can contaminate food if hands are not washed carefully after handling the solder
B	High voltages can cause lead-tin solder to disintegrate suddenly
C	Tin in the solder can “cold flow,” causing shorts in the circuit
D	RF energy can convert the lead into a poisonous gas

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The portion between 28.3 MHz and 28.5 MHz
B	The portion between 28.1 MHz and 28.2 MHz
C	The portion above 29.5 MHz
D	The entire band

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 control operator
C	The IEEE
D	The ITU

5. - G1C02

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

Select	Answer
A	1500 watts PEP output
B	200 watts PEP output
C	50 watts PEP output
D	An effective radiated power equivalent to 100 watts from a half-wave dipole

6. - G1D11

What action is required to obtain a new General class license after a previously held license has expired and the two-year grace period has passed?

Select	Answer
A	There are no requirements other than being able to show a copy of the expired license
B	They must have a letter from the FCC showing they once held an amateur or commercial license
C	Contact the FCC to have the license reinstated
D	The applicant must show proof of the appropriate expired license grant and pass the current Element 2 exam

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

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

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	1 kHz to 3 kHz
B	5 Hz to 50 Hz
C	3 kHz to 6 kHz
D	150 Hz to 500 Hz

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Key clicks
B	100 percent copy
C	Report was read from an S meter rather than estimated
D	Chirpy or unstable signal

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who conduct amateur licensing examinations
B	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
C	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
D	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	DSB
B	USB
C	SSB
D	LSB

13. - G3A13

What does the A-index measure?

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above 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 amplified by interaction with the ionosphere
D	They are refracted back to Earth

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The ionospheric region involved is unstable
B	The E region is not present
C	Energy is scattered into the skip zone through several different paths
D	Ground waves are absorbing much of the signal

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To balance the transmitter audio frequency response
B	To reduce harmonic radiation
C	To prevent excessive drive
D	To increase overall efficiency

17. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Radio wave propagation
B	Antenna front-to-back ratio
C	Standing wave ratio
D	RF interference

18. - G4C01

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

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

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	12 dB
B	18 dB
C	6 dB
D	15 dB

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ensure the battery is placed terminals-up
B	A series resistor must be in place
C	The solar panel must have a charge controller
D	Ground the solar panel outer metal framework

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance increases
C	As the frequency of the applied AC increases, the reactance decreases
D	As the amplitude of the applied AC increases, the reactance decreases

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	100 watts
B	1.4 watts
C	400 watts
D	353.5 watts

23. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

Select	Answer
A	Mutual capacitance
B	Mutual inductance
C	Capacitive coupling
D	Displacement current coupling

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Trigger electrode
B	Control grid
C	Screen grid
D	Suppressor grid

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. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 1
B	Symbol 4
C	Symbol 5
D	Symbol 2

27. - G7B06

What is a shift register?

Select	Answer
A	A digital mixer
B	A clocked array of circuits that passes data in steps along the array
C	An analog mixer
D	An array of operational amplifiers used for tri-state arithmetic operations

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	Zero
B	90 degrees
C	45 degrees
D	180 degrees

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By keying an FM transmitter with a sub-audible tone
B	By using a transceiver’s computer data interface protocol to change frequencies
C	By changing an oscillator’s frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	8 kHz
B	5 kHz
C	16 kHz
D	3 kHz

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters are sent with more power
B	Upper case letters use longer Varicode bit sequences and thus slow down transmission
C	Higher power is needed as compared to RTTY for similar error rates
D	Error correction is used to ensure accurate message reception

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	1:2
B	2:1
C	1:4
D	4:1

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

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 1.5 dB higher
B	Approximately 3 dB higher
C	Approximately 6 dB higher
D	Approximately 9 dB higher

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Impedance varies periodically as a function of frequency
B	SWR varies periodically as a function of boom length
C	Element length and spacing vary logarithmically along the boom
D	Gain varies logarithmically as a function of frequency

Figure G7-1