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

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Make sure all circuits that supply power to the tower are locked out and tagged
B	All these choices are correct
C	Notify the electric company that a person will be working on the tower
D	Unground the base of the tower

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	12 meters
B	160 meters
C	30 meters
D	17 meters

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

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

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	10 watts RMS
B	1500 watts PEP
C	ERP of 100 watts PEP with respect to an isotropic antenna
D	ERP of 100 watts PEP with respect to a dipole

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of General class or higher
B	At least two Volunteer Examiners of General class or higher
C	At least two Volunteer Examiners of Technician class or higher
D	At least three Volunteer Examiners of Technician class

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	When a station is transmitting spread spectrum emissions
C	When operating within one mile of an FCC Monitoring Station
D	All these choices are correct

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Very high-fidelity voice modulation
B	Ease of tuning on receive and immunity to impulse noise
C	Less subject to interference from atmospheric static crashes
D	Less bandwidth used and greater power efficiency

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	A person holding an FCC-issued amateur operator license or an appropriate government official
B	Only a RACES net control operator
C	Any control operator when normal communication systems are operational
D	Only a person holding an FCC-issued amateur operator license

10. - G2C10

What does the Q signal “QRN” mean?

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

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	A wireless network capable of both VHF and HF band operation
B	A form of Packet Radio
C	An amateur radio wireless network to send and receive email on the internet
D	All of the above

13. - G3A12

What does the K-index measure?

Select	Answer
A	The solar radio flux at Boulder, Colorado
B	The short-term stability of Earth’s geomagnetic field
C	The relative position of sunspots on the surface of the Sun
D	The short-term stability of the Sun’s magnetic field

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted back to Earth
B	They pass through the ionosphere
C	They are amplified by interaction with the ionosphere
D	They are refracted and trapped in the ionosphere to circle Earth

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The highest frequency which is refracted back to Earth
B	The frequency at which the signal-to-noise ratio is 6 dB
C	The lowest frequency which is refracted back to Earth
D	The frequency at which the signal-to-noise ratio approaches unity

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A slow, rhythmic oscillation
B	A pronounced peak
C	A pronounced dip
D	No change will be observed

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	An external RF oscillator
B	The attenuated RF output of the transmitter
C	The local oscillator of the transmitter
D	The transmitter balanced mixer output

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	You receive reports of “hum” on your station’s transmitted signal
C	You receive reports of harmonic interference from your station
D	The SWR reading for one or more antennas is suddenly very high

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 100 times more powerful
D	It is 20 times less powerful

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To reduce RF voltage discharge from the tip of the antenna while transmitting
B	To reduce the chance of damage if the antenna should strike an object
C	To increase the “Q” of the antenna
D	To narrow the operating bandwidth of the antenna

21. - G5A08

What is impedance?

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

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

Select	Answer
A	2120 watts
B	1500 watts
C	530 watts
D	1060 watts

23. - G5C13

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

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

24. - G6A10

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

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

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	The ratio of outer diameter to inner diameter
B	Its conductivity
C	The composition, or “mix,” of materials used
D	Its thickness

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 2
B	Symbol 4
C	Symbol 1
D	Symbol 5

27. - G7B11

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

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

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	Minimum detectible signal level is reduced
B	The need for high resolution analog-to-digital converters is eliminated
C	All types of modulation can be created with appropriate processing
D	Automatic conversion of the signal from digital to analog

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase transformation
B	Phase inversion
C	Phase modulation
D	Phase convolution

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Beat frequency oscillator
B	Local oscillator
C	RF input
D	Image frequency

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 7-bit code with start, stop, and parity bits
B	A code using error detection and correction
C	A 5-bit code with additional start and stop bits
D	A code using SELCAL and LISTEN

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The frequency of the signal and the length of the line
B	The distance between the centers of the conductors and the length of the line
C	The radius of the conductors and the frequency of the signal
D	The distance between the centers of the conductors and the radius of the conductors

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	Parallel to the antenna element
C	As high as possible above the ground
D	At the center of the antenna

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The power radiated in the major lobe compared to that in the opposite direction
B	The ratio of forward gain to dipole gain
C	The number of directors versus the number of reflectors
D	The relative position of the driven element with respect to the reflectors and directors

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 300 ohms
B	Approximately 50 ohms
C	Very low
D	Very high

Figure G7-1