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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	All these choices are correct
B	Change to a non-polarized antenna with higher gain
C	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
D	Use an antenna with a higher front-to-back ratio

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Make sure all circuits that supply power to the tower are locked out and tagged
B	All these choices are correct
C	Notify the electric company that a person will be working on the tower
D	Unground the base of the tower

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	20 meters
C	30 meters
D	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	All these choices are correct
C	Automatic identification of repeaters
D	Transmission of bulletins of general interest to amateur radio licensees

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1500 watts PEP output
B	100 watts PEP output
C	2000 watts PEP output
D	1000 watts PEP output

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Only those of the FCC
B	Those of both the remote station’s country and the FCC
C	Only those of the remote station’s country
D	Those of the remote station’s country and the FCC’s third-party regulations

7. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Only in the non-phone Extra Class segments of the bands
B	On any band segment where digital operation is permitted
C	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
D	Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Ease of tuning on receive and immunity to impulse noise
B	Very high-fidelity voice modulation
C	Less subject to interference from atmospheric static crashes
D	Less bandwidth used and greater power efficiency

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

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	We have worked before
B	Send slower
C	I have received and understood
D	We have already confirmed the contact

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. - G2E12

Which of the following describes Winlink?

Select	Answer
A	A wireless network capable of both VHF and HF band operation
B	An amateur radio wireless network to send and receive email on the internet
C	A form of Packet Radio
D	All of the above

13. - G3A01

How does a higher sunspot number affect HF propagation?

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

14. - G3B02

What factors affect the MUF?

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

15. - G3C07

What makes HF scatter signals often sound distorted?

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

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	Interference from impulse noise will be eliminated
B	More stations can be accommodated within a given signal passband
C	Accidental out-of-band operation can be prevented
D	It may be possible to reduce or eliminate interference from other signals

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	An oscilloscope
B	A sidetone monitor
C	A field strength meter
D	A wavemeter

18. - G4C02

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

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

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

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

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent overload by regulating the charging voltage
B	To prevent discharge of the battery through the panel during times of low or no illumination
C	To prevent damage to the battery due to excessive voltage at high illumination levels
D	To limit the current flowing from the panel to a safe value

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A Pi-network
B	A transformer
C	All these choices are correct
D	A length of transmission line

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	40 volts
B	360 volts
C	120 volts
D	25.5 volts

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is separated from the drain by a thin insulating layer
B	The gate is separated from the channel by a thin insulating layer
C	The source is formed by depositing metal on silicon
D	The gate is formed by a back-biased junction

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	Forward biased
C	In the tunnel-effect region
D	Reverse biased

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. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Add the RF input power to the DC output power
C	Divide the RF output power by the DC input power
D	Divide the DC input power by the DC output power

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	Minimum detectible signal level is reduced
B	The need for high resolution analog-to-digital converters is eliminated
C	Automatic conversion of the signal from digital to analog
D	All types of modulation can be created with appropriate processing

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase inversion
B	Phase modulation
C	Phase transformation
D	Phase convolution

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Symbol rate and bandwidth are not related
B	Bandwidth is half the symbol rate
C	Higher symbol rates require wider bandwidth
D	Lower symbol rates require wider bandwidth

31. - G8C04

Which of the following describes Baudot code?

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

32. - G9A09

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

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

33. - G9B02

Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Coil the radials
B	Slope the radials downward
C	Lengthen the radials beyond one wavelength
D	Slope the radials upward

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

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To enable multiband operation
B	To notch spurious frequencies
C	To prevent out-of-band operation
D	To provide balanced feed point impedance