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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes radiation poisoning
B	It heats body tissue
C	It cools body tissue
D	It causes the blood count to reach a dangerously low level

2. - G0B10

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

Select	Answer
A	High voltages can cause lead-tin solder to disintegrate suddenly
B	RF energy can convert the lead into a poisonous gas
C	Lead can contaminate food if hands are not washed carefully after handling the solder
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	28.000 MHz to 28.025 MHz
B	21.275 MHz to 21.300 MHz
C	7.125 MHz to 7.175 MHz
D	All these choices are correct

4. - G1B10

What is the power limit for beacon stations?

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

5. - G1C05

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

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

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	Whenever they operate using General class frequency privileges
B	Whenever they operate on any amateur frequency
C	Whenever they operate using Technician frequency privileges
D	A special identifier is not required if their General class license application has been filed with the FCC

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When messages are encrypted
B	When messages are not encrypted
C	Under no circumstances
D	When under automatic control

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say your call sign once
B	Say “QRZ” several times, followed by your call sign
C	Say “CQ” followed by the call sign of either station
D	Say “Breaker Breaker”

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

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	SK
B	AR
C	BK
D	KN

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Send a QSL card to the stations worked, or QSL via Logbook of The World
B	Identify your station according to normal FCC regulations
C	Submit a log to the contest sponsor
D	All these choices are correct

12. - G2E02

What is VARA?

Select	Answer
A	A digital protocol used with Winlink
B	A low signal-to-noise digital mode used for EME (moonbounce)
C	A DX spotting system using a network of software defined radios
D	A radio direction finding system used on VHF and UHF

13. - G3A08

How can a geomagnetic storm affect HF propagation?

Select	Answer
A	Improve high-latitude HF propagation
B	Degrade ground wave propagation
C	Degrade high-latitude HF propagation
D	Improve ground wave propagation

14. - G3B10

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the E region?

Select	Answer
A	180 miles
B	2,500 miles
C	1,200 miles
D	12,000 miles

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Scatter
B	Short-path
C	Faraday rotation
D	Chordal hop

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	Automatic generation of dots and dashes for CW operation
B	Automatic transmit/receive switching
C	Computer interface for PSK and RTTY operation
D	To allow time for switching the antenna from the receiver to the transmitter

17. - G4B08

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

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

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Place a ferrite choke on the cable
B	Connect the center conductor to the shield of all cables to short circuit the RFI signal
C	Add an additional insulating jacket to the cable
D	Ground the center conductor of the audio cable causing the interference

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 8 times
B	Approximately 2 times
C	Approximately 4 times
D	Approximately 1.5 times

20. - G4E05

Which of the following most limits an HF mobile installation?

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

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	Z
B	X
C	B
D	Y

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	25.9 percent
B	20.6 percent
C	12.2 percent
D	10.9 percent

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	An inductor in series
B	A capacitor in parallel
C	A capacitor in series
D	An inductor in parallel

24. - G6A02

What is an advantage of batteries with low internal resistance?

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

25. - G6B08

How is an LED biased when emitting light?

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

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	Fewer circuit components are required
C	Inherently more stable
D	Faster switching time makes higher output voltage possible

27. - G7B08

How is the efficiency of an RF power amplifier determined?

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

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Frequency modulated RF
B	Audio with equalized frequency response
C	Audio extracted from the modulation signal
D	Double-sideband modulated RF

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Phase modulation
B	Multiplex modulation
C	Pulse 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 results in the best signal-to-noise ratio
C	It improves impedance matching of the antenna
D	It is required by FCC rules

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Backscatter propagation
B	Long path propagation
C	Insufficient modulation
D	Overmodulation

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	A difference between feed line impedance and antenna feed point impedance
B	Using more transmitter power than the antenna can handle
C	Feeding the antenna with unbalanced feed line
D	Operating an antenna at its resonant frequency

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Hemispherical
B	Isotropic
C	Bi-directional in azimuth
D	Omnidirectional in azimuth

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
B	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
D	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying its body capacitance
B	By extending and retracting the whip
C	By varying the base loading inductance
D	By deploying a capacitance hat