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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
B	Change to a non-polarized antenna with higher gain
C	Use an antenna with a higher front-to-back ratio
D	All these choices are correct

2. - G0B08

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

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

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	20 meters
B	12 meters
C	160 meters
D	30 meters

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	Only “Q” signals are permitted
B	They are not permitted
C	They are limited to those expressly listed in Part 97 of the FCC rules
D	They may be used if they do not obscure the meaning of a message

5. - G1C10

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

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

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. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	A system of propagation beacon stations operates on those frequencies
B	These frequencies are set aside for emergency operations
C	These frequencies are set aside for bulletins from the FCC
D	A system of automatic digital stations operates on those frequencies

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Transmit audio or microphone gain
B	Attenuator level
C	Antenna inductance or capacitance
D	RF clipping level

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Acknowledge the station in distress and determine what assistance may be needed
C	Immediately cease all transmissions
D	Inform your local emergency coordinator

10. - G2C09

What does the Q signal “QSL” mean?

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

11. - G2D07

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

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

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	LSB
B	DSB
C	SSB
D	USB

13. - G3A13

What does the A-index measure?

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

14. - G3B08

What does MUF stand for?

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

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The F2 region
B	The E region
C	The D region
D	The F1 region

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	Accidental out-of-band operation can be prevented
B	More stations can be accommodated within a given signal passband
C	Interference from impulse noise will be eliminated
D	It may be possible to reduce or eliminate interference from other signals

17. - G4B07

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

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

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Add an additional insulating jacket to the cable
B	Ground the center conductor of the audio cable causing the interference
C	Place a ferrite choke on the cable
D	Connect the center conductor to the shield of all cables to short circuit the RFI signal

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	All these choices are correct
B	Excess intermodulation products
C	Distorted speech
D	Excessive background noise

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The socket is not wired with an RF-shielded power cable
B	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
C	The socket’s wiring may be inadequate for the current drawn by the transceiver
D	Drawing more than 50 watts from this socket could cause the engine to overheat

21. - G5A08

What is impedance?

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

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	169.7 volts
B	84.8 volts
C	240.0 volts
D	339.4 volts

23. - G5C04

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

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

24. - G6A02

What is an advantage of batteries with low internal resistance?

Select	Answer
A	Long life
B	High voltage
C	Rapid recharge
D	High discharge current

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	50 MHz
B	500 MHz
C	4 GHz
D	40 GHz

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A series of DC pulses at the same frequency as the AC input
B	A steady DC voltage
C	A sine wave at half the frequency of the AC input
D	A series of DC pulses at twice the frequency of the AC input

27. - G7B06

What is a shift register?

Select	Answer
A	An array of operational amplifiers used for tri-state arithmetic operations
B	A clocked array of circuits that passes data in steps along the array
C	An analog mixer
D	A digital mixer

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Mixing products are greatly reduced
B	A wide range of filter bandwidths and shapes can be created
C	Fewer digital components are required
D	The DSP filter is much more effective at VHF frequencies

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	8-tone frequency shift keying
B	8-bit direct sequence spread spectrum
C	Vestigial sideband
D	Amplitude compressed AM

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It improves impedance matching of the antenna
B	It is required by FCC rules
C	It minimizes power consumption in the receiver
D	It results in the best signal-to-noise ratio

31. - G8C09

Which is true of mesh network microwave nodes?

Select	Answer
A	Having more nodes increases signal strengths
B	Links between two nodes in a network may have different frequencies and bandwidths
C	If one node fails, a packet may still reach its target station via an alternate node
D	More nodes reduce overall microwave out of band interference

32. - G9A05

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

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

33. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It steadily decreases
B	It is unaffected by the location of the feed point
C	It steadily increases
D	It peaks at about 1/8 wavelength from the end

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 6 dB higher
B	Approximately 1.5 dB higher
C	Approximately 9 dB higher
D	Approximately 3 dB higher

35. - G9D09

What is the primary use of a Beverage antenna?

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