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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	All these choices are correct
C	Its power density
D	Its frequency

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	Lightning grounds must be connected to all ungrounded wiring
B	They must be bonded together with all other grounds
C	They must be bonded to all buried water and gas lines
D	Bends in ground wires must be made as close as possible to a right angle

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
D	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	50 feet
B	250 feet
C	100 feet
D	200 feet

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	2.8 kHz
B	3 kHz
C	1.8 kHz
D	5.6 kHz

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Amateur Extra, General, and Technician
B	None, only Amateur Extra class licensees may be accredited
C	Technician only
D	General and Technician

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

8. - G2A09

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

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

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Advise the interfering stations that you are on the frequency and that you have priority
B	Switch to the opposite sideband
C	Decrease power and continue to transmit
D	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 5 wpm
B	The fastest speed at which you are comfortable copying, but no slower than the CQ
C	The fastest speed at which you are comfortable copying, but no faster than the CQ
D	At the standard calling speed of 10 wpm

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows accurate land masses
B	A map that shows true bearings and distances from a specific location
C	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
D	A map that shows the angle at which an amateur satellite crosses the equator

12. - G2E15

Which of the following is a common location for FT8?

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

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A sudden drop in the solar flux index
B	Ripples in the geomagnetic force
C	A temporary disturbance in Earth’s geomagnetic field
D	A thunderstorm that affects radio propagation

14. - G3B07

What does LUF stand for?

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

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

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

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	Received signals may become distorted
B	Received frequency may become unstable
C	CW signals may become severely attenuated
D	Received frequency may shift several kHz

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 audio frequency range square wave signals of equal amplitude
C	Two swept frequency tones
D	Two non-harmonically related audio signals

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	Insulated wire has been used for the ground wire
B	The ground wire has high impedance on that frequency
C	Flat braid rather than round wire has been used for the ground wire
D	The ground rod is resonant

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 1 kHz below the edge of the segment
B	At least 3 kHz above the edge of the band
C	At least 3 kHz below the edge of the band
D	At least 1 kHz above the edge of the segment

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

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reactance
B	Admittance
C	Reluctance
D	Conductance

22. - G5B12

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

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

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	360 volts
B	120 volts
C	25.5 volts
D	40 volts

24. - G6A12

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

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

25. - G6B04

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

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

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 1
B	Symbol 11
C	Symbol 4
D	Symbol 5

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class AB
B	Class C
C	Class A
D	Class B

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Modulation
B	All these choices are correct
C	Detection
D	Filtering

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The waveform created by connecting the peak values of the modulated signal
B	The carrier frequency that contains the signal
C	The bandwidth of the modulated signal
D	Spurious signals that envelop nearby frequencies

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To allow time for the other station to break in during a transmission
B	To aid in tuning your transmitter
C	To prevent overmodulation
D	Some modes have high duty cycles that could exceed the transmitter’s average power rating

31. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	MFSK16
B	SSB-SC
C	WSPR
D	PSK31

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

33. - G9B01

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

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

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 6 dB higher
B	Approximately 9 dB higher
C	Approximately 1.5 dB higher
D	Approximately 3 dB higher

35. - G9D07

Which of the following describes a log-periodic antenna?

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

Figure G7-1