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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	All stations with a time-averaged transmission of more than one milliwatt
B	All commercial stations; amateur radio stations are exempt
C	Only stations transmitting more than 500 watts PEP
D	Only stations with antennas lower than one wavelength above the ground

2. - G0B12

What is the purpose of a power supply interlock?

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

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	12 meters
B	30 meters
C	11 meters
D	60 meters

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the foreign country has a formal third-party agreement filed with the FCC
B	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
C	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country
D	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country

5. - G1C06

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

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

6. - G1D01

Who may receive partial credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
B	Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago
C	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
D	Any person who can demonstrate that they once held an FCC-issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for licensed radio amateurs
B	Under no circumstances except for emergencies
C	Under any circumstances in which third party messages are permitted by FCC rules
D	Only when the message is intended for third parties in areas where licensing is controlled by the FCC

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

Select	Answer
A	Upper sideband
B	Double sideband
C	Suppressed sideband
D	Lower sideband

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Advise the interfering stations that you are on the frequency and that you have priority
B	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
C	Decrease power and continue to transmit
D	Switch to the opposite sideband

10. - G2C03

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

Select	Answer
A	Operating full break-in
B	No US stations should call
C	Closing station now
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 FCC requires a log of all international third-party traffic
C	The log provides evidence of operation needed to renew a license without retest
D	To help with a reply if the FCC requests information about your station

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Anywhere in the CW portion of the band
B	Approximately 14.110 MHz to 14.113 MHz
C	Anywhere in the voice portion of the band
D	Approximately 14.074 MHz to 14.077 MHz

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Reduce long delayed echoes
B	Improve HF long path propagation
C	Creates auroras that can reflect VHF signals
D	Increases signal strength for HF signals passing through the polar regions

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 are amplified by interaction with the ionosphere
C	They pass through the ionosphere
D	They are refracted and trapped in the ionosphere to circle Earth

15. - G3C09

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

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

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To prevent excessive drive
B	To increase overall efficiency
C	To balance the transmitter audio frequency response
D	To reduce harmonic radiation

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Better for measuring computer circuits
B	Faster response
C	Less prone to overload
D	Higher precision

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	A chirpy CW signal
B	A CW signal at a nearly pure audio frequency
C	On-and-off humming or clicking
D	Severely distorted audio

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It increases peak power
B	It increases average power
C	It reduces harmonic distortion
D	It reduces intermodulation distortion

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Short antennas are more likely to cause distortion of transmitted signals
B	Operating bandwidth may be very limited
C	Harmonic radiation may increase
D	Q of the antenna will be very low

21. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of direct current caused by resistance
B	Reinforcement of the flow of alternating current caused by capacitance or inductance
C	Opposition to the flow of alternating current caused by capacitance or inductance
D	Reinforcement of the flow of direct current caused by resistance

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	625 watts
B	8.75 watts
C	5000 watts
D	2500 watts

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	24 to 1
B	3.5 to 1
C	144 to 1
D	12 to 1

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	Comparatively low cost
C	High capacitance for given volume
D	High stability

25. - G6B11

What is an SMA connector?

Select	Answer
A	A type-S to type-M adaptor
B	A type of push-on connector intended for high-voltage applications
C	A connector designed for serial multiple access signals
D	A small threaded connector suitable for signals up to several GHz

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	360 degrees
B	180 degrees
C	90 degrees
D	270 degrees

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To eliminate self-oscillations
B	To keep the carrier on frequency
C	To cut off the final amplifier during standby periods
D	To limit the modulation index

28. - G7C05

Which of the following is characteristic of a direct digital synthesizer (DDS)?

Select	Answer
A	Relatively high-power output
B	Pure sine wave output
C	Extremely narrow tuning range
D	Variable output frequency with the stability of a crystal oscillator

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency transformation
B	Frequency convolution
C	Frequency conversion
D	Frequency 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 is required by FCC rules
C	It results in the best signal-to-noise ratio
D	It improves impedance matching of the antenna

31. - G8C15

What does an FT8 signal report of +3 mean?

Select	Answer
A	The signal is 3 times the noise level of an equivalent SSB signal
B	The signal is S3 (weak signals)
C	The signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth
D	The signal is 3 dB over S9

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	Between 1:1 and 5:1 depending on the reflected power at the transmitter
B	5:1
C	1:1
D	Between 1:1 and 5:1 depending on the characteristic impedance of the line

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	24 feet
B	33 feet
C	16 feet
D	8 feet

34. - G9C07

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

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

35. - G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

Select	Answer
A	Broadside and in the plane of the loop
B	Broadside to the loop
C	Electrically small loops are omnidirectional
D	In the plane of the loop