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

2. - G0B08

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

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

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	12 meters
B	30 meters
C	20 meters
D	160 meters

4. - G1B06

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

Select	Answer
A	Under no circumstances, FCC rules take priority
B	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
C	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
D	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure

5. - G1C02

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

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

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	On any General or Technician class band segment
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	On any General or Technician class band segment except 30 meters and 60 meters
D	Only on the Technician band segments until you have a receipt for the FCC application fee payment

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
B	Under no circumstances except for emergencies
C	Only when the message is intended for licensed radio amateurs
D	Under any circumstances in which third party messages are permitted by FCC rules

8. - G2A03

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

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

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	5 Hz to 50 Hz
B	3 kHz to 6 kHz
C	150 Hz to 500 Hz
D	1 kHz to 3 kHz

10. - G2C08

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

Select	Answer
A	KN
B	BK
C	AR
D	SK

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	Frequent retries or timeouts
B	Long pauses in message transmission
C	Failure to establish a connection between stations
D	All these choices are correct

13. - G3A04

Which of the following are the least reliable bands for long-distance communications during periods of low solar activity?

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

14. - G3B11

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

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

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The lowest frequency which is refracted back to Earth
B	The highest frequency which is refracted back to Earth
C	The frequency at which the signal-to-noise ratio is 6 dB
D	The frequency at which the signal-to-noise ratio approaches unity

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By reducing receiver gain during a noise pulse
B	By redirecting noise pulses into a filter capacitor
C	By clipping noise peaks
D	By temporarily increasing received bandwidth

17. - G4B05

Why do voltmeters have high input impedance?

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

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	You receive reports of harmonic interference from your station
B	An item of station equipment starts to draw excessive amounts of current
C	You receive reports of “hum” on your station’s transmitted signal
D	The SWR reading for one or more antennas is suddenly very high

19. - G4D02

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

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

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The battery charging system
B	The control computers
C	All these choices are correct
D	The fuel delivery system

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Farad
B	Ohm
C	Siemens
D	Ampere

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

Select	Answer
A	2120 watts
B	1500 watts
C	1060 watts
D	530 watts

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

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

24. - G6A03

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

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

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	High power handling capability
B	Low power consumption
C	Better suited for power supply regulation
D	Better suited for RF amplification

26. - G7A09

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

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

27. - G7B06

What is a shift register?

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

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Ultimate rejection
B	Rolloff
C	Insertion loss
D	Notch depth

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Frequency modulation
C	Phase modulation
D	Power modulation

30. - G8B13

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

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

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	10.7 GHz
B	2.4 GHz
C	432 MHz
D	902 MHz

32. - G9A09

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

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

33. - G9B02

Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Slope the radials downward
B	Coil the radials
C	Slope the radials upward
D	Lengthen the radials beyond one wavelength

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 3 dB higher
B	Approximately 6 dB higher
C	Approximately 1.5 dB higher
D	Approximately 9 dB higher

35. - G9D08

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

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

Figure G7-1