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	Change to a non-polarized antenna with higher gain
D	All these choices are correct

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Always hold on to the tower with one hand
B	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
C	Ensure that all heavy tools are securely fastened to the harness
D	All these choices are correct

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
C	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
D	Amateur stations may use the band only during emergencies

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 ITU
C	The IEEE
D	The FCC

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Obtain an experimental license from the FCC
B	Publicly document the technical characteristics of the protocol
C	Type-certify equipment to FCC standards
D	Submit a rule-making proposal to the FCC describing the codes and methods of the technique

6. - G1D02

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

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

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

8. - G2A08

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

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

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Inform your local emergency coordinator
B	Immediately decrease power to avoid interfering with the station in distress
C	Immediately cease all transmissions
D	Acknowledge the station in distress and determine what assistance may be needed

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Closing station now
B	Operating full break-in
C	No US stations should call
D	Listening only for a specific station or stations

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send an email to the system control operator
B	Transmit a connect message on the station’s published frequency
C	Respond when the station broadcasts its SSID
D	Send QRL in Morse code

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is improved
B	HF communication is disturbed
C	VHF/UHF ducting is disturbed
D	VHF/UHF ducting is improved

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

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. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To improve frequency accuracy by allowing variable frequency output (VFO) operation
B	To transmit on one frequency and listen on another
C	To allow transmitting on two frequencies at once
D	To permit full duplex operation -- that is, transmitting and receiving at the same time

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Gain of a directional antenna
B	Front-to-back ratio of an antenna
C	Impedance of coaxial cable
D	Power output from a transmitter

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	A soldered joint will likely be destroyed by the heat of a lightning strike
B	Solder has too high a dielectric constant to provide adequate lightning protection
C	Solder flux will prevent a low conductivity connection
D	All these choices are correct

19. - G4D04

What does an S meter measure?

Select	Answer
A	Carrier suppression
B	Received signal strength
C	Impedance
D	Transmitter power output

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Shunt
B	Series-parallel
C	Bypass
D	Full-wave bridge

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A transformer
B	A Pi-network
C	A length of transmission line
D	All these choices are correct

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	100 watts
B	400 watts
C	353.5 watts
D	1.4 watts

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	10.750 nanofarads
B	576.9 nanofarads
C	1,733 picofarads
D	3,583 picofarads

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Suppressor grid
B	Screen grid
C	Trigger electrode
D	Control grid

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A08

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

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

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is high when either or both inputs are low
B	Output is low only when both inputs are high
C	Output is low when either or both inputs are high
D	Output is high only when both inputs are high

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	90 degrees
B	Zero
C	45 degrees
D	180 degrees

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	8 kHz
B	16 kHz
C	3 kHz
D	5 kHz

31. - G8C02

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

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

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 100 feet
B	Decibels per 1,000 feet
C	Ohms per 1,000 feet
D	Ohms per 100 feet

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a figure-eight off both ends of the antenna
B	It is a figure-eight at right angles to the antenna
C	It is a circle (equal radiation in all directions)
D	It has a pair of lobes on one side of the antenna and a single lobe on the other side

34. - G9C08

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

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

35. - G9D08

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

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