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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	Only stations with antennas lower than one wavelength above the ground
B	All stations with a time-averaged transmission of more than one milliwatt
C	All commercial stations; amateur radio stations are exempt
D	Only stations transmitting more than 500 watts PEP

2. - G0B08

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

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

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	12 meters
B	30 meters
C	160 meters
D	20 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	Only when the foreign country has a formal third-party agreement filed with the FCC
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 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
D	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications

5. - G1C08

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

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

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	There is no age limit
B	18 years
C	21 years
D	16 years

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When messages are encrypted
B	Under no circumstances
C	When messages are not encrypted
D	When under automatic control

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say “CQ” followed by the call sign of either station
B	Say “QRZ” several times, followed by your call sign
C	Say “Breaker Breaker”
D	Say your call sign once

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	QSOs in progress have priority
B	Nets have priority
C	Contest operations should yield to non-contest use of frequencies
D	Except during emergencies, no amateur station has priority access to any frequency

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	The fastest speed at which you are comfortable copying, but no slower than the CQ
B	At the standard calling speed of 5 wpm
C	At the standard calling speed of 10 wpm
D	The fastest speed at which you are comfortable copying, but no faster than the CQ

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

12. - G2E02

What is VARA?

Select	Answer
A	A DX spotting system using a network of software defined radios
B	A low signal-to-noise digital mode used for EME (moonbounce)
C	A radio direction finding system used on VHF and UHF
D	A digital protocol used with Winlink

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	8 minutes
C	28 days
D	20 to 40 hours

14. - G3B09

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the F2 region?

Select	Answer
A	12,000 miles
B	2,500 miles
C	180 miles
D	1,200 miles

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Double hop propagation near the LUF
B	Long path HF propagation at sunrise and sunset
C	Short distance MF or HF propagation at high elevation angles
D	Propagation near the MUF

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

17. - G4B07

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

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

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Using a balun to feed an unbalanced antenna
B	Lack of rectification of the transmitter’s signal in power conductors
C	Arcing at a poor electrical connection
D	Not using a balun or line isolator to feed balanced antennas

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.1765 MHz to 7.1795 MHz
B	7.178 MHz to 7.184 MHz
C	7.175 MHz to 7.178 MHz
D	7.178 MHz to 7.181 MHz

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	The solar panel must have a charge controller
B	Ground the solar panel outer metal framework
C	A series resistor must be in place
D	Ensure the battery is placed terminals-up

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A length of transmission line
B	All these choices are correct
C	A transformer
D	A Pi-network

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	24 volts
B	34 volts
C	12 volts
D	8.5 volts

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

Select	Answer
A	7 millihenries
B	70 millihenries
C	1,000 millihenries
D	14.3 millihenries

24. - G6A05

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

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

25. - G6B01

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

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

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 1
B	Symbol 2
C	Symbol 4
D	Symbol 5

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	AM
B	FM
C	All these choices are correct
D	SSB

28. - G7C11

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

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

29. - G8A13

What is a link budget?

Select	Answer
A	The difference between transmit power and receiver sensitivity
B	The financial costs associated with operating a radio link
C	The sum of antenna gains minus system losses
D	The sum of transmit power and antenna gains minus system losses as seen at the receiver

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Detection
B	Intermodulation
C	Rolloff
D	Heterodyning

31. - G8C15

What does an FT8 signal report of +3 mean?

Select	Answer
A	The signal is S3 (weak signals)
B	The signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth
C	The signal is 3 dB over S9
D	The signal is 3 times the noise level of an equivalent SSB signal

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	75 ohms
B	450 ohms
C	50 ohms
D	100 ohms

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	Antenna height has no effect on the pattern
B	If the antenna is too high, the pattern becomes unpredictable
C	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
D	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBd is 1.25 dBd lower
B	Gain in dBi is 2.15 dB lower
C	Gain in dBi is 2.15 dB higher
D	Gain in dBd is 1.25 dBd higher

35. - G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

Select	Answer
A	Electrically small loops are omnidirectional
B	Broadside to the loop
C	In the plane of the loop
D	Broadside and in the plane of the loop

Figure G7-1