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

2. - G0B13

Where should lightning arrestors be located?

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

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

Select	Answer
A	80 meters, 40 meters, 20 meters, and 15 meters
B	60 meters, 30 meters, 17 meters, and 12 meters
C	160 meters, 60 meters, 15 meters, and 12 meters
D	80 meters, 20 meters, 15 meters, and 10 meters

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	No more than one beacon station may transmit in the same band from the same station location
B	All these choices are correct
C	The frequency must be coordinated with the National Beacon Organization
D	The frequency must be posted on the internet or published in a national periodical

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	1500 watts PEP output
C	200 watts PEP output
D	50 watts PEP output

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	365 days
B	For as long as your current license is valid
C	180 days
D	30 days

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	1500 watts
B	100 watts
C	100 milliwatts
D	10 watts

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single sideband
B	Frequency modulation
C	Double sideband
D	Single phase modulation

9. - G2B06

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

Select	Answer
A	Listen for 2 minutes before calling CQ
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	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	I am troubled by static
B	Zero beat my signal
C	Send more slowly
D	Stop sending

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Send a QSL card to the stations worked, or QSL via Logbook of The World
B	Identify your station according to normal FCC regulations
C	All these choices are correct
D	Submit a log to the contest sponsor

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	DSB
B	CW
C	LSB
D	USB

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

Select	Answer
A	1 to 2 hours
B	28 days
C	8 minutes
D	20 to 40 hours

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	HF communications over the path are enhanced
B	Double-hop propagation along the path is more common
C	Propagation via ordinary skywave communications is not possible over that path
D	Propagation over the path on all HF frequencies is enhanced

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

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

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	Desensitization which can cause intermodulation products which interfere with impedance readings
B	All these choices are correct
C	Received power that interferes with SWR readings
D	Generation of harmonics which interfere with frequency readings

18. - G4C01

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

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

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It increases peak power
B	It reduces harmonic distortion
C	It increases average power
D	It reduces intermodulation distortion

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To limit the current flowing from the panel to a safe value
B	To prevent damage to the battery due to excessive voltage at high illumination levels
C	To prevent overload by regulating the charging voltage
D	To prevent discharge of the battery through the panel during times of low or no illumination

21. - G5A03

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

Select	Answer
A	Conductance
B	Reactance
C	Admittance
D	Reluctance

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The peak value
B	The RMS value
C	The peak-to-peak value
D	The reciprocal of the RMS value

23. - G5C14

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

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

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

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

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	MMIC
C	Programmable Logic
D	Digital

26. - G7A05

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

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

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	6
B	3
C	8
D	16

28. - G7C14

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

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

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase convolution
B	Phase modulation
C	Phase transformation
D	Phase inversion

30. - G8B13

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

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

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	Mark and space
B	Dot and dash
C	High and low
D	On and off

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	2:1
B	5:1
C	1:2
D	1:5

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a circle (equal radiation in all directions)
B	It is a figure-eight at right angles to the antenna
C	It is a figure-eight off both ends of the antenna
D	It has a pair of lobes on one side of the antenna and a single lobe on the other side

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
B	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
D	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
B	A horizontal dipole placed at approximately 1/2 wavelength above the ground
C	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
D	A vertical dipole placed at approximately 1/2 wavelength above the ground