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

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Overvoltage on the hot wires
B	Current flowing from one or more of the hot wires to the neutral wire
C	Current flowing from one or more of the hot wires directly to ground
D	All these choices are correct

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz
B	The lower frequency portion
C	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz
D	The upper frequency portion

4. - G1B06

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

Select	Answer
A	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
B	Under no circumstances, FCC rules take priority
C	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
D	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

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	50 watts PEP output
D	1500 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	General and Technician
B	None, only Amateur Extra class licensees may be accredited
C	Technician only
D	Amateur Extra, General, and Technician

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	All these choices are correct
C	When a station is transmitting spread spectrum emissions
D	When operating within one mile of an FCC Monitoring Station

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband is more efficient than upper sideband at these frequencies
B	Because it is fully compatible with an AM detector
C	Lower sideband is the only sideband legal on these frequency bands
D	It is commonly accepted amateur practice

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

Select	Answer
A	Only contacts with other stations within the 48 contiguous states
B	Only SSTV contacts
C	Only digital contacts
D	Only contacts with stations not within the 48 contiguous states

10. - G2C07

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

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

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Along the gray line
B	Toward the north
C	Toward the rising sun
D	180 degrees from the station’s short-path heading

12. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send a NAK code
B	Joining an existing contact is not possible, PACTOR connections are limited to two stations
C	Transmit a steady carrier until the PACTOR protocol times out and disconnects
D	Send broadcast packets containing your call sign while in MONITOR mode

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
B	A zero sunspot number indicates undisturbed conditions
C	A zero sunspot number indicates that radio propagation is not possible on any band
D	Lower sunspot numbers generally indicate greater probability of sporadic E propagation

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Time of day and season
B	Path distance and location
C	Solar radiation and ionospheric disturbances
D	All these choices are correct

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

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

16. - G4A06

What is the purpose of an antenna tuner?

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

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Gain of a directional antenna
B	Power output from a transmitter
C	Front-to-back ratio of an antenna
D	Impedance of coaxial cable

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Using a balun to feed an unbalanced antenna
B	Lack of rectification of the transmitter’s signal in power conductors
C	Not using a balun or line isolator to feed balanced antennas
D	Arcing at a poor electrical connection

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 2 times
B	Approximately 8 times
C	Approximately 1.5 times
D	Approximately 4 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	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
B	The socket’s wiring may be inadequate for the current drawn by the transceiver
C	Drawing more than 50 watts from this socket could cause the engine to overheat
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 increases
C	As the amplitude of the applied AC increases, the reactance increases
D	As the frequency of the applied AC increases, the reactance decreases

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	173 volts
B	245 volts
C	692 volts
D	346 volts

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	5.9 ohms
B	0.17 ohms
C	17 ohms
D	80 ohms

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor’s tolerance value would not be adequate
B	The resistor could overheat
C	The resistor’s inductance could make circuit performance unpredictable
D	The resistor’s internal capacitance would detune the circuit

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	500 MHz
B	4 GHz
C	40 GHz
D	50 MHz

26. - G7A09

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

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

27. - G7B03

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

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

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in an FM receiver to filter out unwanted sidebands
B	Used in a single sideband receiver to extract the modulated signal
C	Used in test gear to detect spurious mixing products
D	Used in transmitter to perform frequency multiplication

29. - G8A08

Which of the following is an effect of overmodulation?

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

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Image frequency
B	RF input
C	Beat frequency oscillator
D	Local oscillator

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 5-bit code with additional start and stop bits
B	A code using error detection and correction
C	A code using SELCAL and LISTEN
D	A 7-bit code with start, stop, and parity bits

32. - G9A07

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

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

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 must be longer than 1 wavelength
C	It produces only vertically polarized radiation
D	Station equipment may carry significant RF current

34. - G9C05

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

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

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	Omnidirectional in the plane of the halo
B	Opposite the feed point
C	On the same side as the feed point
D	Broadside to the plane of the halo

Figure G7-1