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	File an Environmental Impact Statement (EIS-97) with the FCC
C	Secure written permission from your neighbors to operate above the controlled MPE limits
D	All these choices are correct

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	Fuel should be stored near the generator for rapid refueling in case of an emergency
B	All these choices are correct
C	The generator should be operated in a well-ventilated area
D	The generator must be insulated from ground

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz
B	The upper frequency portion
C	The lower frequency portion
D	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The IEEE
B	The FCC
C	The ITU
D	The control operator

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	PEP input to the antenna
B	RMS output from the transmitter
C	RMS input to the antenna
D	PEP output from the transmitter

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	A special identifier is not required if their General class license application has been filed with the FCC
B	Whenever they operate on any amateur frequency
C	Whenever they operate using General class frequency privileges
D	Whenever they operate using Technician frequency privileges

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 3
B	Region 2
C	Region 4
D	Region 1

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

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	Listen for 2 minutes before calling CQ
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	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

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	BK
B	AR
C	SK
D	KN

11. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare signal strengths between the input and output of the repeater
B	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
C	Compare vertical and horizontal signal strengths on the input frequency
D	All these choices are correct

12. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send a NAK code
B	Joining an existing contact is not possible, PACTOR connections are limited to two stations
C	Send broadcast packets containing your call sign while in MONITOR mode
D	Transmit a steady carrier until the PACTOR protocol times out and disconnects

13. - G3A09

How can high geomagnetic activity benefit radio communications?

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

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just below the MUF
B	Just above the LUF
C	Just above the critical frequency
D	Just below the critical frequency

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 frequency at which the signal-to-noise ratio approaches unity
D	The lowest frequency which is refracted back to Earth

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
B	To prevent key clicks on CW
C	To allow time for the amplifier power supply to reach operating level
D	To prevent transient overmodulation

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of carrier phase shift
B	Percentage of frequency modulation
C	Linearity
D	Percentage of suppression of the carrier and undesired sideband for SSB

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	Solder has too high a dielectric constant to provide adequate lightning protection
B	All these choices are correct
C	A soldered joint will likely be destroyed by the heat of a lightning strike
D	Solder flux will prevent a low conductivity connection

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	18 dB
B	6 dB
C	12 dB
D	15 dB

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 narrow the operating bandwidth of the antenna
D	To increase the “Q” of the antenna

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance decreases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

22. - G5B08

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

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

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	0.07 microfarads
B	70 microfarads
C	14.3 microfarads
D	1,000 microfarads

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. - G6B01

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

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

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 4
B	Symbol 7
C	Symbol 1
D	Symbol 6

27. - G7B01

What is the purpose of neutralizing an amplifier?

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

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Cutoff and rolloff
B	Upper and lower half-power
C	Image and harmonic
D	Pole and zero

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	Its encoding provides error correction
B	All these choices are correct
C	It is sideband sensitive
D	Its bandwidth is approximately the same as BPSK31

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The average
B	The arithmetic product
C	The ratio
D	The sum and difference

31. - G8C09

Which is true of mesh network microwave nodes?

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

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	4:1
B	1:4
C	2:1
D	1:2

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	At the center of the antenna
D	As high as possible above the ground

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The direction of maximum radiated field strength from the antenna
B	The maximum voltage standing wave point on a radiating element
C	The point of maximum current in a radiating antenna element
D	The magnitude of the maximum vertical angle of radiation

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying the base loading inductance
B	By deploying a capacitance hat
C	By extending and retracting the whip
D	By varying its body capacitance

Figure G7-1