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

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. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	11 meters
B	12 meters
C	60 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	They may be used if they do not obscure the meaning of a message
B	Only “Q” signals are permitted
C	They are not permitted
D	They are limited to those expressly listed in Part 97 of the FCC rules

5. - G1C11

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

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

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	16 years
C	21 years
D	18 years

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	Anywhere in the band
B	Channels 42 through 45
C	Channels 1 through 4
D	No part

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

Select	Answer
A	Double sideband
B	Upper sideband
C	Suppressed sideband
D	Lower sideband

9. - G2B01

Which of the following is true concerning access to frequencies?

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

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. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	To help with a reply if the FCC requests information about your station
B	The FCC requires a log of all international contacts
C	The FCC requires a log of all international third-party traffic
D	The log provides evidence of operation needed to renew a license without retest

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	All these choices are correct
B	The mark and space frequencies may be reversed
C	You may have selected the wrong baud rate
D	You may be listening on the wrong sideband

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

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Send a series of dots and listen for echoes
B	All these choices are correct
C	Use a network of automated receiving stations on the internet to see where your transmissions are being received
D	Check the A-index

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
B	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
C	The long path azimuth of a distant station
D	The short path azimuth of a distant station

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Increase power transfer from the transmitter to the feed line
B	Reduce the SWR in the feed line to the antenna
C	All these choices are correct
D	Reduce the power dissipation in the feedline to the antenna

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It allows for higher voltages to be safely measured
B	It decreases the loading on circuits being measured
C	It improves the frequency response
D	It improves the resolution of the readings

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Using surge suppressor power outlets
B	Placing low-pass filters on all feed lines
C	Building all equipment in a metal enclosure
D	Bonding all equipment enclosures together

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.344 MHz to 14.347 MHz
B	14.347 MHz to 14.350 MHz
C	14.347 MHz to 14.647 MHz
D	14.3455 MHz to 14.3485 MHz

20. - G4E06

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

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

21. - G5A05

How does an inductor react to AC?

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

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	0.707
B	1.00
C	2.00
D	1.414

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	40 volts
B	25.5 volts
C	360 volts
D	120 volts

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

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

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	Ferrites expel magnetic fields
B	By creating an impedance in the current’s path
C	By creating an out-of-phase current to cancel the common-mode current
D	It converts common-mode current to differential mode current

26. - G7A09

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

Select	Answer
A	Symbol 4
B	Symbol 1
C	Symbol 2
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	FM
B	AM
C	All these choices are correct
D	SSB

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	IF amplifier
C	RF amplifier
D	Carrier oscillator

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To allow time for the other station to break in during a transmission
B	To aid in tuning your transmitter
C	Some modes have high duty cycles that could exceed the transmitter’s average power rating
D	To prevent overmodulation

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is intensity, time is vertical
B	Frequency is vertical, signal strength is horizontal, time is intensity
C	Frequency is horizontal, signal strength is vertical, time is intensity
D	Frequency is vertical, signal strength is intensity, time is horizontal

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 100 feet
B	Decibels per 1,000 feet
C	Ohms per 100 feet
D	Ohms per 1,000 feet

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

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Resonant frequency is lower
B	Front-to-back ratio decreases
C	Beamwidth increases
D	Gain increases

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To notch spurious frequencies
B	To provide balanced feed point impedance
C	To prevent out-of-band operation
D	To enable multiband operation

Figure G7-1