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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The total time of the exposure
B	The average time it takes RF radiation to have any long-term effect on the body
C	The average amount of power developed by the transmitter over a specific 24-hour period
D	The total RF exposure averaged over a certain period

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	Make sure all circuits that supply power to the tower are locked out and tagged
D	Unground the base of the tower

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The lower frequency portion
B	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz
C	The upper frequency portion
D	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	50 feet
B	250 feet
C	200 feet
D	100 feet

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1000 watts PEP output
B	1200 watts PEP output
C	1500 watts PEP output
D	200 watts PEP output

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	A license from the foreign country and a special remote station permit from the FCC
B	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
C	A US operator/primary station license
D	Only an appropriate US operator/primary license and a special remote station permit from the FCC

7. - G1E12

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

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

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband and the carrier are transmitted; the other sideband is suppressed
B	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
C	Only one sideband is transmitted; the other sideband and carrier are suppressed
D	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Decrease power and continue to transmit
B	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
C	Advise the interfering stations that you are on the frequency and that you have priority
D	Switch to the opposite sideband

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Are you listening only for a specific station?”
B	“Will you keep the frequency clear?”
C	“Are you busy?” or “Is this frequency in use?”
D	“Are you operating full break-in?” or “Can you operate full break-in?”

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
B	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
C	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary
D	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary

12. - G2E03

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

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

13. - G3A04

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

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

14. - G3B11

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

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

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

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

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To permit full duplex operation -- that is, transmitting and receiving at the same time
B	To improve frequency accuracy by allowing variable frequency output (VFO) operation
C	To allow transmitting on two frequencies at once
D	To transmit on one frequency and listen on another

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of frequency modulation
B	Percentage of suppression of the carrier and undesired sideband for SSB
C	Linearity
D	Percentage of carrier phase shift

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Bond equipment enclosures together
B	Avoid using lock washers and star washers when making ground connections
C	Connect the AC neutral conductor to the ground wire
D	Connect all ground conductors in series

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	12 dB
B	18 dB
C	6 dB
D	15 dB

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	Ensure the battery is placed terminals-up
C	A series resistor must be in place
D	Ground the solar panel outer metal framework

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Conductance
B	Admittance
C	Reluctance
D	Reactance

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 3 dB
B	Approximately 2 dB
C	Approximately 9 dB
D	Approximately 6 dB

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	24 to 1
B	3.5 to 1
C	12 to 1
D	144 to 1

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	Comparatively low cost
C	High stability
D	High capacitance for given volume

25. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Multi-Mode Integrated Circuit
B	Metal Monolayer Integrated Circuit
C	Mode Modulated Integrated Circuit
D	Monolithic Microwave Integrated Circuit

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	The output voltage is two times the peak input voltage
B	The ripple frequency is twice that of a full-wave rectifier
C	More current can be drawn from the half-wave rectifier
D	Only one diode is required

27. - G7B06

What is a shift register?

Select	Answer
A	A clocked array of circuits that passes data in steps along the array
B	A digital mixer
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	Insertion loss
B	Notch depth
C	Ultimate rejection
D	Rolloff

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using quadra-pole sideband keying to generate spread spectrum signals
B	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
C	Modulation using quasi-parallel to serial conversion to reduce bandwidth
D	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	5 kHz
B	416.7 Hz
C	101.75 Hz
D	60 kHz

31. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	MFSK16
B	PSK31
C	WSPR
D	SSB-SC

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. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength above ground
C	It is unaffected by the height above ground
D	It steadily increases

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	The reflector is shorter, and the director is longer
B	The reflector is longer, and the director is shorter
C	Relative length depends on the frequency of operation
D	They are all the same length

35. - G9D04

What is the primary function of antenna traps?

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