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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An SWR meter with a peak-reading function
B	A calibrated field strength meter with a calibrated antenna
C	An oscilloscope with a high-stability crystal marker generator
D	A receiver with digital signal processing (DSP) noise reduction

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 20
B	AWG number 8
C	AWG number 16
D	AWG number 12

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

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	200 watts PEP output
B	100 watts PEP output
C	10 watts PEP output
D	20 watts PEP output

5. - G1C06

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

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

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	365 days
B	180 days
C	For as long as your current license is valid
D	30 days

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

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single sideband
B	Double sideband
C	Single phase modulation
D	Frequency modulation

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 contacts with stations not within the 48 contiguous states
D	Only digital contacts

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	I am troubled by static
B	Stop sending
C	Zero beat my signal
D	Send more slowly

11. - G2D10

What is QRP operation?

Select	Answer
A	Low-power transmit operation
B	Transmission using Quick Response Protocol
C	Traffic relay procedure net operation
D	Remote piloted model control

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Always call on the station’s frequency
B	Find a clear frequency during the same time slot as the calling station
C	Call on any frequency in the waterfall except the station’s frequency
D	Find a clear frequency during the alternate time slot to the calling station

13. - G3A10

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

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

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	All these choices are correct
B	Check the A-index
C	Send a series of dots and listen for echoes
D	Use a network of automated receiving stations on the internet to see where your transmissions are being received

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

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 allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
C	To prevent key clicks on CW
D	To prevent transient overmodulation

17. - G4B08

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

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

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	Clearly audible speech
B	A steady hum whenever the transmitter is on the air
C	Distorted speech
D	On-and-off humming or clicking

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 10 times less powerful
B	It is 20 times more powerful
C	It is 20 times less powerful
D	It is 100 times more powerful

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 socket’s wiring may be inadequate for the current drawn by the transceiver
B	Drawing more than 50 watts from this socket could cause the engine to overheat
C	The socket is not wired with an RF-shielded power cable
D	The DC polarity of the socket is reversed from the polarity of modern HF transceivers

21. - G5A08

What is impedance?

Select	Answer
A	The ratio of current to voltage
B	The product of current and reactance
C	The product of current and voltage
D	The ratio of voltage to current

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	169.7 volts
B	339.4 volts
C	84.8 volts
D	240.0 volts

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	0.30 henries
B	3.3 millihenries
C	30 millihenries
D	3.3 henries

24. - G6A02

What is an advantage of batteries with low internal resistance?

Select	Answer
A	High discharge current
B	High voltage
C	Long life
D	Rapid recharge

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Transformers and transducers
B	Diodes
C	Capacitors and inductors
D	All these choices are correct

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	All these choices are correct
B	AM
C	FM
D	SSB

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	All these choices are correct
B	Input amplifier gain
C	Demodulator stage bandwidth
D	Input amplifier noise figure

29. - G8A08

Which of the following is an effect of overmodulation?

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

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Reactance modulator
B	Multiplier
C	Balanced converter
D	Mixer

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Entire file received correctly
B	Packet was received without error
C	Request retransmission of the packet
D	Receiving station connected and ready for transmissions

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	2:1
C	5:1
D	1:5

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

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The point of maximum current in a radiating antenna element
B	The direction of maximum radiated field strength from the antenna
C	The magnitude of the maximum vertical angle of radiation
D	The maximum voltage standing wave point on a radiating element

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Directional transmitting for low HF bands
B	Directional receiving for MF and low HF bands
C	Portable direction finding at higher HF frequencies
D	Portable direction finding at lower HF frequencies