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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes radiation poisoning
B	It heats body tissue
C	It cools body tissue
D	It causes the blood count to reach a dangerously low level

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	15 amperes
B	25 amperes
C	20 amperes
D	30 amperes

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	14250 kHz
B	21300 kHz
C	24900 kHz
D	18155 kHz

4. - G1B04

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

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

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	1.8 kHz
B	5.6 kHz
C	3 kHz
D	2.8 kHz

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

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	A system of automatic digital stations operates on those frequencies
B	These frequencies are set aside for emergency operations
C	A system of propagation beacon stations operates on those frequencies
D	These frequencies are set aside for bulletins from the FCC

8. - G2A03

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

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

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	All these choices are correct
B	Listen on the frequency for at least two minutes to be sure it is clear
C	Identify your station by transmitting your call sign at least 3 times
D	Follow the voluntary band plan

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	I am ready to receive
B	I am quitting for the day
C	There is interference on the frequency
D	You are sending too fast

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	America, Boston, Canada, Denmark
B	Alpha, Bravo, Charlie, Delta
C	Adam, Boy, Charles, David
D	Able, Baker, Charlie, Dog

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Call on any frequency in the waterfall except the station’s frequency
B	Always call on the station’s frequency
C	Find a clear frequency during the same time slot as the calling station
D	Find a clear frequency during the alternate time slot to the calling station

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	A zero sunspot number indicates undisturbed conditions
C	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
D	Lower sunspot numbers generally indicate greater probability of sporadic E propagation

14. - G3B11

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

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

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of the Doppler effect
B	Because it is the highest
C	Because it is the densest
D	Because of temperature inversions

16. - G4A03

How does a noise blanker work?

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

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An oscilloscope
B	A signal generator
C	An ammeter
D	An ohmmeter

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	High RF voltages on the enclosures of station equipment
B	Overheating of ground straps
C	A ground loop
D	Corrosion of the ground rod

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

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	FCC rules limiting mobile output power on the 75-meter band
B	Efficiency of the electrically short antenna
C	The wire gauge of the DC power line to the transceiver
D	“Picket fencing”

21. - G5A04

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

Select	Answer
A	Admittance
B	Reluctance
C	Conductance
D	Reactance

22. - G5B11

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

Select	Answer
A	1.414
B	0.707
C	1.00
D	2.00

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	360 volts
B	40 volts
C	120 volts
D	25.5 volts

24. - G6A11

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

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

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A small bayonet connector used for data circuits
B	A moisture-resistant RF connector useful to 10 GHz
C	A low noise figure VHF connector
D	A nickel plated version of the PL-259

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. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the counter
B	The time delay of the lag circuit
C	The number of stages in the divider
D	The inductance and capacitance in the tank circuit

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Cutoff and rolloff
B	Upper and lower half-power
C	Pole and zero
D	Image and harmonic

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Frequency inversion
B	Phase inversion
C	Synthesizing
D	Heterodyning

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Entire file received correctly
B	Receiving station connected and ready for transmissions
C	Request retransmission of the packet
D	Packet was received without error

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation decreases
B	Attenuation increases
C	Attenuation is independent of frequency
D	Attenuation follows Marconi’s Law of Attenuation

33. - G9B01

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

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

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The number of directors versus the number of reflectors
B	The relative position of the driven element with respect to the reflectors and directors
C	The power radiated in the major lobe compared to that in the opposite direction
D	The ratio of forward gain to dipole gain

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 50 ohms
B	Approximately 300 ohms
C	Very high
D	Very low