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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	Only stations with antennas lower than one wavelength above the ground
B	All stations with a time-averaged transmission of more than one milliwatt
C	All commercial stations; amateur radio stations are exempt
D	Only stations transmitting more than 500 watts PEP

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
B	To shut off the power supply if too much voltage is produced
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. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

Select	Answer
A	60 meters, 30 meters, 17 meters, and 12 meters
B	80 meters, 40 meters, 20 meters, and 15 meters
C	80 meters, 20 meters, 15 meters, and 10 meters
D	160 meters, 60 meters, 15 meters, and 12 meters

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	Automatic identification of repeaters
C	Transmission of bulletins of general interest to amateur radio licensees
D	All these choices are correct

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Type-certify equipment to FCC standards
B	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
C	Publicly document the technical characteristics of the protocol
D	Obtain an experimental license from the FCC

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	A Volunteer Examiner Coordinator
B	The Universal Licensing System
C	The Wireless Telecommunications Bureau
D	The Federal Communications Commission

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

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	It allows “hands free” operation
B	It provides more power output
C	The received signal is more natural sounding
D	It occupies less bandwidth

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

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

12. - G2E15

Which of the following is a common location for FT8?

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

13. - G3A12

What does the K-index measure?

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

14. - G3B07

What does LUF stand for?

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

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Propagation near the MUF
B	Long path HF propagation at sunrise and sunset
C	Short distance MF or HF propagation at high elevation angles
D	Double hop propagation near the LUF

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Increase power transfer from the transmitter to the feed line
B	Reduce the SWR in the feed line to the antenna
C	Reduce the power dissipation in the feedline to the antenna
D	All these choices are correct

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two audio signals of the same frequency shifted 90 degrees
B	Two non-harmonically related audio signals
C	Two audio frequency range square wave signals of equal amplitude
D	Two swept frequency tones

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Bond equipment enclosures together
B	Connect all ground conductors in series
C	Avoid using lock washers and star washers when making ground connections
D	Connect the AC neutral conductor to the ground wire

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 2 times
D	Approximately 8 times

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
C	The socket’s wiring may be inadequate for the current drawn by the transceiver
D	The socket is not wired with an RF-shielded power cable

21. - G5A05

How does an inductor react to AC?

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

22. - G5B06

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

Select	Answer
A	1.4 watts
B	400 watts
C	353.5 watts
D	100 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	Displacement current coupling
B	Capacitive coupling
C	Mutual capacitance
D	Mutual inductance

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase efficiency
B	To increase the control grid resistance
C	To decrease plate resistance
D	To reduce grid-to-plate capacitance

25. - G6B05

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

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

26. - G7A09

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

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

27. - G7B06

What is a shift register?

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

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Image and harmonic
B	Cutoff and rolloff
C	Pole and zero
D	Upper and lower half-power

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Excessive bandwidth
B	Insufficient audio
C	Insufficient bandwidth
D	Frequency drift

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	Reactance modulator
D	Mixer

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	2.4 GHz
B	10.7 GHz
C	432 MHz
D	902 MHz

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	Between 1:1 and 5:1 depending on the characteristic impedance of the line
B	Between 1:1 and 5:1 depending on the reflected power at the transmitter
C	5:1
D	1:1

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It is more effective on the lower HF bands than on the higher bands
B	It produces only vertically polarized radiation
C	Station equipment may carry significant RF current
D	It must be longer than 1 wavelength

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The number of elements on the boom
B	All these choices are correct
C	The spacing of each element along the boom
D	The physical length of the boom

35. - G9D07

Which of the following describes a log-periodic antenna?

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

Figure G7-1