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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its power density
B	Its duty cycle
C	Its frequency
D	All these choices are correct

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	In series with each ground lead
B	On the antenna, opposite the feed point
C	Where the feed lines enter the building
D	At the closest power pole ground electrode

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

4. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
B	Under no circumstances, FCC rules take priority
C	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
D	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure

5. - G1C10

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

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

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of Technician class
B	At least three Volunteer Examiners of General class or higher
C	At least two Volunteer Examiners of General class or higher
D	At least two Volunteer Examiners of Technician class or higher

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party’s amateur license has been revoked and not reinstated
B	The third party is not a US citizen
C	All these choices are correct
D	The third party is speaking in a language other than English

8. - G2A12

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

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

9. - G2B03

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

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

10. - G2C11

What does the Q signal “QRV” mean?

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

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
B	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
C	Amateur volunteers who conduct amateur licensing examinations
D	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency

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

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	None, because only areas on the night side of the Earth are affected
B	It enhances propagation on all HF frequencies
C	It disrupts communications via satellite more than direct communications
D	It disrupts signals on lower frequencies more than those on higher frequencies

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are refracted and trapped in the ionosphere to circle Earth
B	They pass through the ionosphere
C	They are refracted back to Earth
D	They are attenuated before reaching the destination

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The E region is unstable during daylight hours
B	The F region is unstable during daylight hours
C	The F region absorbs signals at these frequencies during daylight hours
D	The D region absorbs signals at these frequencies during daylight hours

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	No change will be observed
B	A slow, rhythmic oscillation
C	A pronounced dip
D	A pronounced peak

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Impedance of coaxial cable
B	Power output from a transmitter
C	Gain of a directional antenna
D	Front-to-back ratio of an antenna

18. - G4C01

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

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

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz above the edge of the segment
B	At least 1 kHz below the edge of the segment
C	At least 3 kHz below the edge of the segment
D	At least 1 kHz above the edge of the segment

20. - G4E06

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

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

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Reluctance
B	Reactance
C	Admittance
D	Conductance

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	173 volts
B	346 volts
C	692 volts
D	245 volts

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	0.17 ohms
B	5.9 ohms
C	17 ohms
D	80 ohms

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	Inexpensive RF capacitor
B	High capacitance for a given volume
C	Much less leakage than any other type
D	Tight tolerance

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Digital
B	Analog
C	MMIC
D	Programmable Logic

26. - G7A05

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

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

27. - G7B06

What is a shift register?

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

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Double-sideband modulated RF
B	Frequency modulated RF
C	Audio with equalized frequency response
D	Audio extracted from the modulation signal

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Single sideband
B	Phase modulation
C	Vestigial sideband
D	Frequency modulation

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	2F1-F2
B	All these choices are correct
C	5F1-3F2
D	3F1-F2

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using error detection and correction
B	A 5-bit code with additional start and stop bits
C	A code using SELCAL and LISTEN
D	A 7-bit code with start, stop, and parity bits

32. - G9A07

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

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

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

34. - G9C08

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

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

35. - G9D08

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

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