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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	File an Environmental Impact Statement (EIS-97) with the FCC
B	All these choices are correct
C	Take action to prevent human exposure to the excessive RF fields
D	Secure written permission from your neighbors to operate above the controlled MPE limits

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut off the power supply if too much voltage is produced
B	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
C	To shut down the unit if it becomes too hot
D	To ensure that dangerous voltages are removed if the cabinet is opened

3. - G1A05

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

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

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	On any frequency if transmissions are in Morse code
B	21.08 MHz to 21.09 MHz
C	28.20 MHz to 28.30 MHz
D	On any frequency if power is less than 1 watt

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	300 baud
B	1200 baud
C	19.6 kilobaud
D	56 kilobaud

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Federal Communications Commission
B	A Volunteer Examiner Coordinator
C	The Universal Licensing System
D	The Wireless Telecommunications Bureau

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 3
B	Region 2
C	Region 1
D	Region 4

8. - G2A08

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

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

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	Have a backup frequency in case of interference or poor conditions
B	All these choices are correct
C	Transmit the full net roster at the beginning of every session
D	Always use multiple sets of phonetics during check-in

10. - G2C09

What does the Q signal “QSL” mean?

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

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	180 degrees from the station’s short-path heading
B	Along the gray line
C	Toward the rising sun
D	Toward the north

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	Send QRL in Morse code
C	Respond when the station broadcasts its SSID
D	Transmit a connect message on the station’s published frequency

13. - G3A06

What is a geomagnetic storm?

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

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency during a 24-hour period
B	The Minimum Usable Frequency for communications between two points
C	The Minimum Usable Frequency during a 24-hour period
D	The Maximum Usable Frequency for communications between two points

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

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Reduce the SWR in the feed line to the antenna
B	All these choices are correct
C	Increase power transfer from the transmitter to the feed line
D	Reduce the power dissipation in the feedline to the antenna

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Transmitter
B	Receiver
C	All these choices are correct
D	Antenna and feed line

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Reverse-biased diode
B	Bypass inductor
C	Bypass capacitor
D	Forward-biased diode

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 4 times
C	Approximately 2 times
D	Approximately 1.5 times

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	A series resistor must be in place
C	Ground the solar panel outer metal framework
D	The solar panel must have a charge controller

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Susceptance
B	Reluctance
C	Conductance
D	Admittance

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It equals the sum of the currents through each branch
B	It decreases as more parallel branches are added to the circuit
C	It equals the average of the branch currents
D	It is the sum of the reciprocal of each individual voltage drop

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	67 ohms
B	75 ohms
C	150 ohms
D	300 ohms

24. - G6A12

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

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

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 7
B	Symbol 1
C	Symbol 4
D	Symbol 6

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	100%
B	50%
C	Less than 50%
D	More than 50% but less than 100%

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	180 degrees
B	Zero
C	45 degrees
D	90 degrees

29. - G8A08

Which of the following is an effect of overmodulation?

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

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Symbol rate and bandwidth are not related
B	Lower symbol rates require wider bandwidth
C	Higher symbol rates require wider bandwidth
D	Bandwidth is half the symbol rate

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Varicode
B	Binary
C	Volumetric
D	Viterbi

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation increases
B	Attenuation follows Marconi’s Law of Attenuation
C	Attenuation decreases
D	Attenuation is independent of frequency

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	On the surface or buried a few inches below the ground
B	At the center of the antenna
C	Parallel to the antenna element
D	As high as possible above the ground

34. - G9C04

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

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

35. - G9D09

What is the primary use of a Beverage antenna?

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

Figure G7-1