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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Make sure that MPE limits are not exceeded in occupied areas
B	Position the antenna along the edge of a wall to reduce parasitic radiation
C	Locate the antenna close to your operating position to minimize feed-line radiation
D	Make sure the antenna is properly shielded

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	All these choices are correct
C	Unground the base of the tower
D	Make sure all circuits that supply power to the tower are locked out and tagged

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

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Occasional retransmission of weather and propagation forecast information from US government stations
B	Encrypted messages, if not intended to facilitate a criminal act
C	Automatic retransmission of other amateur signals by any amateur station
D	Unidentified transmissions of less than 10 seconds duration for test purposes only

5. - G1C08

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

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

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	Whenever they operate on any amateur frequency
B	Whenever they operate using General class frequency privileges
C	Whenever they operate using Technician frequency privileges
D	A special identifier is not required if their General class license application has been filed with the FCC

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must be for other licensed amateurs
B	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	They must relate to emergencies or disaster relief
D	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

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

9. - G2B06

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

Select	Answer
A	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response
B	Listen for 2 minutes before calling CQ
C	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
D	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

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Automatic keyers, instead of hand keys, are used to send Morse code
B	Breaking stations send the Morse code prosign “BK”
C	Transmitting stations can receive between code characters and elements
D	An operator must activate a manual send/receive switch before and after every transmission

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 log provides evidence of operation needed to renew a license without retest
C	The FCC requires a log of all international third-party traffic
D	The FCC requires a log of all international contacts

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Transmit a connect message on the station’s published frequency
B	Respond when the station broadcasts its SSID
C	Send an email to the system control operator
D	Send QRL in Morse code

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

Select	Answer
A	28 days
B	14 days
C	4 to 8 minutes
D	15 hours to several days

14. - G3B04

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

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

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Scatter
B	Short-path
C	Chordal hop
D	Faraday rotation

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	Computer interface for PSK and RTTY operation
B	To allow time for switching the antenna from the receiver to the transmitter
C	Automatic generation of dots and dashes for CW operation
D	Automatic transmit/receive switching

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	A sidetone monitor
B	A wavemeter
C	A field strength meter
D	An oscilloscope

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

19. - G4D02

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

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

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Shunt
B	Series-parallel
C	Bypass
D	Full-wave bridge

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Siemens
C	Farad
D	Ampere

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

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	3,583 picofarads
B	1,733 picofarads
C	10.750 nanofarads
D	576.9 nanofarads

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Its reactance increases
B	Harmonics are generated
C	Catastrophic failure is likely
D	It becomes capacitive

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	PL-259
B	BNC
C	Type N
D	RCA Phono

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 4
B	Symbol 1
C	Symbol 5
D	Symbol 11

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC output power
B	Divide the RF output power by the DC input power
C	Add the RF input power to the DC output power
D	Multiply the RF input power by the reciprocal of the RF output power

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To reduce power supply ripple
B	To minimize radiation resistance
C	To minimize transmitter power output
D	To present the desired impedance to the transmitter and feed line

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Local oscillator
B	Beat frequency oscillator
C	RF input
D	Image frequency

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Error correction is used to ensure accurate message reception
B	Higher power is needed as compared to RTTY for similar error rates
C	Upper case letters use longer Varicode bit sequences and thus slow down transmission
D	Upper case letters are sent with more power

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Operating an antenna at its resonant frequency
B	A difference between feed line impedance and antenna feed point impedance
C	Using more transmitter power than the antenna can handle
D	Feeding the antenna with unbalanced feed line

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	Station equipment may carry significant RF current
B	It must be longer than 1 wavelength
C	It is more effective on the lower HF bands than on the higher bands
D	It produces only vertically polarized radiation

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 6 dB higher
B	Approximately 1.5 dB higher
C	Approximately 9 dB higher
D	Approximately 3 dB higher

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Inverted L
B	Lazy H
C	Inverted V
D	Sloper

Figure G7-1