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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	File an Environmental Impact Statement (EIS-97) with the FCC
B	Secure written permission from your neighbors to operate above the controlled MPE limits
C	All these choices are correct
D	Take action to prevent human exposure to the excessive RF fields

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	RF exposure limits of the human body
B	Acceptable modulation limits
C	Acceptable bandwidth limits
D	Electrical safety of the station

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	All HF bands except 160 meters and 10 meters
B	60 meters, 30 meters, 17 meters, and 12 meters
C	80 meters, 40 meters, 20 meters, and 15 meters
D	All HF bands

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	All these choices are correct
B	No more than one beacon station may transmit in the same band from the same station location
C	The frequency must be posted on the internet or published in a national periodical
D	The frequency must be coordinated with the National Beacon Organization

5. - G1C11

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

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

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

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 3
B	Region 1
C	Region 2
D	Region 4

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single sideband
B	Frequency modulation
C	Single phase modulation
D	Double sideband

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Nets have priority
B	QSOs in progress 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. - G2C01

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

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

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	850 Hz
B	85 Hz
C	425 Hz
D	170 Hz

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	A zero sunspot number indicates that radio propagation is not possible on any band
B	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
C	A zero sunspot number indicates undisturbed conditions
D	Lower sunspot numbers generally indicate greater probability of sporadic E propagation

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just below the critical frequency
B	Just above the critical frequency
C	Just below the MUF
D	Just above the LUF

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The E region is not present
B	The ionospheric region involved is unstable
C	Energy is scattered into the skip zone through several different paths
D	Ground waves are absorbing much of the signal

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To prevent receiver overload from strong incoming signals
B	To reduce the transmitter power when driving a linear amplifier
C	To reduce excessive audio level on strong signals
D	To reduce power consumption when operating from batteries

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Antenna and feed line
B	All these choices are correct
C	Receiver
D	Transmitter

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	All these choices are correct
B	Solder flux will prevent a low conductivity connection
C	Solder has too high a dielectric constant to provide adequate lightning protection
D	A soldered joint will likely be destroyed by the heat of a lightning strike

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 3 kHz below the edge of the band
B	At least 1 kHz above the edge of the segment
C	At least 1 kHz below the edge of the segment
D	At least 3 kHz above the edge of the band

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the alternator or generator using insulated heavy duty balanced transmission line
B	To the alternator or generator using heavy-gauge wire
C	To the battery using insulated heavy duty balanced transmission line
D	To the battery using heavy-gauge wire

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Susceptance
B	Reluctance
C	Admittance
D	Conductance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	20.6 percent
B	25.9 percent
C	10.9 percent
D	12.2 percent

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	300 microfarads
B	3.0 microfarads
C	0.33 microfarads
D	33.3 microfarads

24. - G6A02

What is an advantage of batteries with low internal resistance?

Select	Answer
A	Long life
B	High voltage
C	Rapid recharge
D	High discharge current

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	In the tunnel-effect region
B	Reverse biased
C	At the Zener voltage
D	Forward biased

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Diodes
B	All these choices are correct
C	Transformers and transducers
D	Capacitors and inductors

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class B
B	Class A
C	Class C
D	Class AB

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. - G8A12

What is QPSK modulation?

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

30. - G8B01

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

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

31. - G8C01

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

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

32. - G9A04

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

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

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	84 feet
C	42 feet
D	132 feet

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The point of maximum current in a radiating antenna element
B	The direction of maximum radiated field strength from the antenna
C	The magnitude of the maximum vertical angle of radiation
D	The maximum voltage standing wave point on a radiating element

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They must be fed with open wire line
B	They have poor harmonic rejection
C	They must be used with an antenna tuner
D	They present low impedance on all design frequencies