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

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable bandwidth limits
B	Electrical safety of the station
C	Acceptable modulation limits
D	RF exposure limits of the human body

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	The entire band
B	28.000 MHz to 28.300 MHz only
C	28.000 MHz to 28.025 MHz only
D	28.025 MHz to 28.300 MHz only

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	All these choices are correct
B	Transmissions to assist with learning the International Morse code
C	Unidentified test transmissions of less than 10 seconds in duration
D	Regular transmissions offering equipment for sale, if intended for amateur radio use

5. - G1C05

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

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

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Federal Communications Commission
B	The Universal Licensing System
C	A Volunteer Examiner Coordinator
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 1
B	Region 2
C	Region 3
D	Region 4

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
B	Only one sideband and the carrier are transmitted; the other sideband is suppressed
C	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
D	Only one sideband is transmitted; the other sideband and carrier are suppressed

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
B	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
C	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response
D	Listen for 2 minutes before calling CQ

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	I am ready to receive
B	I am quitting for the day
C	You are sending too fast
D	There is interference on the frequency

11. - G2D06

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

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

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Find a clear frequency during the same time slot as the calling station
B	Always call on the station’s frequency
C	Call on any frequency in the waterfall except the station’s frequency
D	Find a clear frequency during the alternate time slot to the calling station

13. - G3A12

What does the K-index measure?

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

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	A slightly delayed echo might be heard
B	Periodic fading approximately every 10 seconds
C	Signal strength increased by 3 dB
D	The signal might be cancelled causing severe attenuation

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. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To eliminate receiver interference from impulse noise sources
B	To restrict the transmitter voice bandwidth
C	To remove interfering splatter generated by signals on adjacent frequencies
D	To reduce interference from carriers in the receiver passband

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two non-harmonically related audio signals
B	Two audio frequency range square wave signals of equal amplitude
C	Two audio signals of the same frequency shifted 90 degrees
D	Two swept frequency tones

18. - G4C01

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

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

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.3455 MHz to 14.3485 MHz
B	14.347 MHz to 14.647 MHz
C	14.347 MHz to 14.350 MHz
D	14.344 MHz to 14.347 MHz

20. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.5 VDC
B	1.38 VDC
C	0.2 VDC
D	0.02 VDC

21. - G5A02

What is reactance?

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

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	34 volts
B	24 volts
C	12 volts
D	8.5 volts

23. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

Select	Answer
A	Displacement current coupling
B	Mutual inductance
C	Capacitive coupling
D	Mutual capacitance

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is separated from the channel by a thin insulating layer
B	The source is formed by depositing metal on silicon
C	The gate is formed by a back-biased junction
D	The source is separated from the drain by a thin insulating layer

25. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Multi-Mode Integrated Circuit
B	Metal Monolayer Integrated Circuit
C	Mode Modulated Integrated Circuit
D	Monolithic Microwave Integrated Circuit

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. - G7B03

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

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

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Return loss
B	Q
C	Insertion loss
D	Ultimate rejection

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

Select	Answer
A	Signal distortion caused by insufficient collector current
B	The transmitter’s carrier is properly suppressed
C	Signal distortion caused by excessive drive or speech levels
D	The transmitter’s automatic level control (ALC) is properly adjusted

30. - G8B06

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

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

31. - G8C10

How does forward error correction (FEC) allow the receiver to correct data errors?

Select	Answer
A	By transmitting redundant information with the data
B	By controlling transmitter output power for optimum signal strength
C	By using a parity bit with each character
D	By using the Varicode character set

32. - G9A01

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

Select	Answer
A	The distance between the centers of the conductors and the length of the line
B	The frequency of the signal 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. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter radials
B	Lower radiation resistance
C	Lower ground losses
D	Lower feed point impedance

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	Relative length depends on the frequency of operation
B	The reflector is longer, and the director is shorter
C	They are all the same length
D	The reflector is shorter, and the director is longer

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Higher gain per element than a Yagi antenna
B	Polarization diversity
C	Harmonic suppression
D	Wide bandwidth