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

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Ensure that all heavy tools are securely fastened to the harness
B	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
C	All these choices are correct
D	Always hold on to the tower with one hand

3. - G1A09

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

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

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	100 feet
C	200 feet
D	250 feet

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

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

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least two Volunteer Examiners of General class or higher
B	At least two Volunteer Examiners of Technician class or higher
C	At least three Volunteer Examiners of General class or higher
D	At least three Volunteer Examiners of Technician class

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 relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
B	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
C	They must be for other licensed amateurs
D	They must relate to emergencies or disaster relief

8. - G2A03

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

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

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	2 kHz to 3 kHz
B	Approximately 6 kHz
C	5 Hz to 50 Hz
D	150 Hz to 500 Hz

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 10 wpm
B	The fastest speed at which you are comfortable copying, but no faster than the CQ
C	The fastest speed at which you are comfortable copying, but no slower than the CQ
D	At the standard calling speed of 5 wpm

11. - G2D07

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

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

12. - G2E06

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

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

13. - G3A01

How does a higher sunspot number affect HF propagation?

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

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Time of day and season
B	Path distance and location
C	Solar radiation and ionospheric disturbances
D	All these choices are correct

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The D region
B	The F2 region
C	The F1 region
D	The E region

16. - G4A08

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

Select	Answer
A	Minimum plate current without exceeding maximum allowable grid current
B	Minimum SWR on the antenna
C	Highest plate voltage while minimizing grid current
D	Desired power output without exceeding maximum allowable plate current

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two audio signals of the same frequency shifted 90 degrees
B	Two audio frequency range square wave signals of equal amplitude
C	Two swept frequency tones
D	Two non-harmonically related audio signals

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	A steady hum whenever the transmitter is on the air
B	Distorted speech
C	On-and-off humming or clicking
D	Clearly audible speech

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 2 times
B	Approximately 1.5 times
C	Approximately 4 times
D	Approximately 8 times

20. - G4E05

Which of the following most limits an HF mobile installation?

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

21. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of alternating current caused by capacitance or inductance
B	Reinforcement of the flow of alternating current caused by capacitance or inductance
C	Reinforcement of the flow of direct current caused by resistance
D	Opposition to the flow of direct current caused by resistance

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	400 watts
B	3200 watts
C	0.5 watts
D	200 watts

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	67 ohms
B	300 ohms
C	75 ohms
D	150 ohms

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	Monolithic Microwave Integrated Circuit
D	Mode Modulated Integrated Circuit

26. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	360 degrees
B	90 degrees
C	180 degrees
D	270 degrees

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To limit the modulation index
B	To eliminate self-oscillations
C	To cut off the final amplifier during standby periods
D	To keep the carrier on frequency

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	45 degrees
B	Zero
C	90 degrees
D	180 degrees

29. - G8A14

What is link margin?

Select	Answer
A	The opposite of fade margin
B	Transmit power minus receiver sensitivity
C	Receiver sensitivity plus 3 dB
D	The difference between received power level and minimum required signal level at the input to the receiver

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It improves impedance matching of the antenna
B	It is required by FCC rules
C	It minimizes power consumption in the receiver
D	It results in the best signal-to-noise ratio

31. - G8C05

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

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

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Transmission line loss does not affect the SWR measurement
B	Higher loss increases SWR measured at the input to the line
C	Higher loss increases the accuracy of SWR measured at the input to the line
D	Higher loss reduces SWR measured at the input to the line

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

34. - G9C08

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

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

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