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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Make sure the antenna is properly shielded
C	Make sure that MPE limits are not exceeded in occupied areas
D	Locate the antenna close to your operating position to minimize feed-line radiation

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the hot wires
B	Only the neutral wire
C	Only the ground wire
D	All wires

3. - G1A04

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

Select	Answer
A	11 meters
B	60 meters
C	12 meters
D	30 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	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
B	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
C	Only when the foreign country has a formal third-party agreement filed with the FCC
D	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

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of both the remote station’s country and the FCC
B	Only those of the FCC
C	Those of the remote station’s country and the FCC’s third-party regulations
D	Only those of the remote station’s country

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The station initiating the contact must be under local or remote control
B	No third-party traffic may be transmitted
C	The interrogating transmission must be made by another automatically controlled station
D	The control operator of the interrogating station must hold an Amateur Extra class license

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

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	3 kHz to 6 kHz
B	1 kHz to 3 kHz
C	5 Hz to 50 Hz
D	150 Hz to 500 Hz

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Chirpy or unstable signal
B	100 percent copy
C	Report was read from an S meter rather than estimated
D	Key clicks

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	America, Boston, Canada, Denmark
B	Adam, Boy, Charles, David
C	Alpha, Bravo, Charlie, Delta
D	Able, Baker, Charlie, Dog

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	Failure to establish a connection between stations
B	All these choices are correct
C	Long pauses in message transmission
D	Frequent retries or timeouts

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	At any point
B	At the summer solstice
C	Only at the minimum point
D	Only at the maximum point

14. - G3B07

What does LUF stand for?

Select	Answer
A	Lowest Usable Frequency during the past 60 minutes
B	The Lowest Usable Frequency during a 24-hour period
C	The Lowest Usable Frequency for communications between two specific points
D	Lowest Usable Frequency for communications to any point outside a 100-mile radius

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Energy is scattered into the skip zone through several different paths
B	The ionospheric region involved is unstable
C	The E region is not present
D	Ground waves are absorbing much of the signal

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By reducing receiver gain during a noise pulse
B	By redirecting noise pulses into a filter capacitor
C	By clipping noise peaks
D	By temporarily increasing received bandwidth

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

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Bond equipment enclosures together
B	Connect the AC neutral conductor to the ground wire
C	Connect all ground conductors in series
D	Avoid using lock washers and star washers when making ground connections

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	14.347 MHz to 14.350 MHz
B	14.347 MHz to 14.647 MHz
C	14.344 MHz to 14.347 MHz
D	14.3455 MHz to 14.3485 MHz

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	Efficiency of the electrically short antenna
B	The wire gauge of the DC power line to the transceiver
C	FCC rules limiting mobile output power on the 75-meter band
D	“Picket fencing”

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Impedance is equal to the arithmetic mean of the inductance and capacitance
B	Resonance causes impedance to be very low
C	Resonance causes impedance to be very high
D	Impedance is equal to the geometric mean of the inductance and capacitance

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	400 watts
B	3200 watts
C	0.5 watts
D	200 watts

23. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

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

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.7 volts
B	0.1 volt
C	1.0 volts
D	0.3 volts

25. - G6B02

What is meant by the term MMIC?

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

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Transformers and transducers
B	Capacitors and inductors
C	Diodes
D	All these choices are correct

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class B
B	Class A
C	Class C
D	Class AB

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Filtering
B	Modulation
C	Detection
D	All these choices are correct

29. - G8A14

What is link margin?

Select	Answer
A	The opposite of fade margin
B	Transmit power minus receiver sensitivity
C	The difference between received power level and minimum required signal level at the input to the receiver
D	Receiver sensitivity plus 3 dB

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To allow time for the other station to break in during a transmission
B	To prevent overmodulation
C	Some modes have high duty cycles that could exceed the transmitter’s average power rating
D	To aid in tuning your transmitter

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	FT8
B	MFSK32
C	MSK144
D	AMTOR

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The antenna feed point must be at DC ground potential
B	The feed line must be an even number of physical half wavelengths long
C	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
D	The feed line must be an odd number of electrical quarter wavelengths long

33. - G9B10

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

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

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 3 dB higher
B	Approximately 6 dB higher
C	Approximately 1.5 dB higher
D	Approximately 9 dB higher

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 its body capacitance
C	By deploying a capacitance hat
D	By varying the base loading inductance