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

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 directly to ground
C	All these choices are correct
D	Current flowing from one or more of the hot wires to the neutral wire

3. - G1A09

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

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

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 control operator
B	The IEEE
C	The ITU
D	The FCC

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	16 years
B	18 years
C	21 years
D	There is no age limit

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	The control operator of the interrogating station must hold an Amateur Extra class license
C	The station initiating the contact must be under local or remote control
D	No third-party traffic may be transmitted

8. - G2A03

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

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

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	A person holding an FCC-issued amateur operator license or an appropriate government official
B	Only a RACES net control operator
C	Any control operator when normal communication systems are operational
D	Only a person holding an FCC-issued amateur operator license

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Automatic keyers, instead of hand keys, are used to send Morse code
B	Breaking stations send the Morse code prosign “BK”
C	Transmitting stations can receive between code characters and elements
D	An operator must activate a manual send/receive switch before and after every transmission

11. - G2D06

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

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

12. - G2E15

Which of the following is a common location for FT8?

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

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	The position of the Moon in its orbit
B	Long term oscillations in the upper atmosphere
C	Cyclic variation in Earth’s radiation belts
D	Rotation of the Sun’s surface layers around its axis

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	World-wide propagation during daylight hours
B	High levels of atmospheric noise or static
C	Poor propagation at any time of day
D	Heavy distortion on signals due to photon absorption

15. - G3C07

What makes HF scatter signals often sound distorted?

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

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier power supply to reach operating level
B	To prevent key clicks on CW
C	To prevent transient overmodulation
D	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output

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 field strength meter
C	A wavemeter
D	A sidetone monitor

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	High RF voltages on the enclosures of station equipment
B	Corrosion of the ground rod
C	Overheating of ground straps
D	A ground loop

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 MHz to 14.647 MHz
B	14.3455 MHz to 14.3485 MHz
C	14.344 MHz to 14.347 MHz
D	14.347 MHz to 14.350 MHz

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	FCC rules limiting mobile output power on the 75-meter band
B	Efficiency of the electrically short antenna
C	The wire gauge of the DC power line to the transceiver
D	“Picket fencing”

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Siemens
C	Farad
D	Ohm

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	400 watts
B	200 watts
C	3200 watts
D	0.5 watts

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

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	Enhancement and depletion modes
B	Peak and valley current points
C	Saturation and cutoff
D	The active region (between cutoff and saturation)

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	The ratio of outer diameter to inner diameter
B	The composition, or “mix,” of materials used
C	Its thickness
D	Its conductivity

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	High-frequency operation allows the use of smaller components
B	Inherently more stable
C	Faster switching time makes higher output voltage possible
D	Fewer circuit components are required

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To limit the modulation index
B	To eliminate self-oscillations
C	To keep the carrier on frequency
D	To cut off the final amplifier during standby periods

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Mixing products are greatly reduced
B	The DSP filter is much more effective at VHF frequencies
C	A wide range of filter bandwidths and shapes can be created
D	Fewer digital components are required

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Phase modulation
B	Power modulation
C	Frequency modulation
D	Amplitude modulation

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It minimizes power consumption in the receiver
B	It improves impedance matching of the antenna
C	It is required by FCC rules
D	It results in the best signal-to-noise ratio

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using SELCAL and LISTEN
B	A code using error detection and correction
C	A 7-bit code with start, stop, and parity bits
D	A 5-bit code with additional start and stop 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 impedance must be matched to the characteristic impedance of the feed line
C	The feed line must be an odd number of electrical quarter wavelengths long
D	The antenna feed point must be at DC ground potential

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

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The number of directors versus the number of reflectors
C	The power radiated in the major lobe compared to that in the opposite direction
D	The relative position of the driven element with respect to the reflectors and directors

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It allows quick selection of vertical or horizontal polarization
B	It narrows the main lobe in azimuth
C	It narrows the main lobe in elevation
D	It allows simultaneous vertical and horizontal polarization