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

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	RF energy can convert the lead into a poisonous gas
B	Lead can contaminate food if hands are not washed carefully after handling the solder
C	High voltages can cause lead-tin solder to disintegrate suddenly
D	Tin in the solder can “cold flow,” causing shorts in the circuit

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	All these choices are correct
B	21.275 MHz to 21.300 MHz
C	7.125 MHz to 7.175 MHz
D	28.000 MHz to 28.025 MHz

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Occasional retransmission of weather and propagation forecast information from US government stations
B	Unidentified transmissions of less than 10 seconds duration for test purposes only
C	Encrypted messages, if not intended to facilitate a criminal act
D	Automatic retransmission of other amateur signals by any amateur station

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1500 watts PEP output
B	1200 watts PEP output
C	1000 watts PEP output
D	200 watts PEP output

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person’s home citizenship must be in ITU region 2
B	The person must be a resident of the US for a minimum of 5 years
C	The person must hold an FCC granted amateur radio license of General class or above
D	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
B	Under any circumstances in which third party messages are permitted by FCC rules
C	Only when the message is intended for licensed radio amateurs
D	Under no circumstances except for emergencies

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

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

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
B	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
C	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response
D	Listen for 2 minutes before calling CQ

10. - G2C09

What does the Q signal “QSL” mean?

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

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	The FCC requires a log of all international third-party traffic
C	To help with a reply if the FCC requests information about your station
D	The log provides evidence of operation needed to renew a license without retest

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	USB
B	DSB
C	LSB
D	CW

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

Select	Answer
A	8 minutes
B	1 to 2 hours
C	20 to 40 hours
D	28 days

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 for communications between two specific points
D	The Lowest Usable Frequency during a 24-hour period

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The D region absorbs signals at these frequencies during daylight hours
B	The E region is unstable during daylight hours
C	The F region is unstable during daylight hours
D	The F region absorbs signals at these frequencies during daylight hours

16. - G4A07

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

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

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of suppression of the carrier and undesired sideband for SSB
B	Percentage of frequency modulation
C	Percentage of carrier phase shift
D	Linearity

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It prevents a blown fuse in the event of an internal short circuit
B	It ensures that the neutral wire is grounded
C	It ensures that hazardous voltages cannot appear on the chassis
D	It prevents signal overload

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	15 dB
B	6 dB
C	18 dB
D	12 dB

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ensure the battery is placed terminals-up
B	Ground the solar panel outer metal framework
C	The solar panel must have a charge controller
D	A series resistor must be in place

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	The circuit radiates all its energy in the form of radio waves
B	Current and voltage are equal
C	Resistance is cancelled
D	Inductive reactance and capacitive reactance cancel

22. - G5B12

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

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

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

24. - G6A09

Which of the following describes MOSFET construction?

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

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	By creating an impedance in the current’s path
B	Ferrites expel magnetic fields
C	It converts common-mode current to differential mode current
D	By creating an out-of-phase current to cancel the common-mode current

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 1
B	Symbol 6
C	Symbol 7
D	Symbol 11

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	6
B	16
C	8
D	3

28. - G7C06

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	Its encoding provides error correction
B	All these choices are correct
C	Its bandwidth is approximately the same as BPSK31
D	It is sideband sensitive

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The sum and difference
B	The ratio
C	The arithmetic product
D	The average

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	On and off
B	High and low
C	Dot and dash
D	Mark and space

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR reduces the relative effect of transmission line loss
B	High SWR makes it difficult to measure transmission line loss
C	High SWR increases loss in a lossy transmission line
D	There is no relationship between transmission line loss and SWR

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower ground losses
B	Shorter radials
C	Lower feed point impedance
D	Lower radiation resistance

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBd is 1.25 dBd higher
B	Gain in dBd is 1.25 dBd lower
C	Gain in dBi is 2.15 dB higher
D	Gain in dBi is 2.15 dB lower

35. - G9D03

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

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

Figure G7-1