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. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By measurement of field strength using calibrated equipment
B	By calculation based on computer modeling
C	All these choices are correct
D	By calculation based on FCC OET Bulletin 65

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut off the power supply if too much voltage is produced
B	To shut down the unit if it becomes too hot
C	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
D	To ensure that dangerous voltages are removed if the cabinet is opened

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	30 meters
B	11 meters
C	12 meters
D	60 meters

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	200 watts PEP output
B	20 watts PEP output
C	10 watts PEP output
D	100 watts PEP output

5. - G1C11

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

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

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	All these choices are correct
B	When using a band where the Amateur Service is secondary
C	When a station is transmitting spread spectrum emissions
D	When operating within one mile of an FCC Monitoring Station

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Very high-fidelity voice modulation
B	Ease of tuning on receive and immunity to impulse noise
C	Less subject to interference from atmospheric static crashes
D	Less bandwidth used and greater power efficiency

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

Select	Answer
A	Only contacts with stations not within the 48 contiguous states
B	Only digital contacts
C	Only SSTV contacts
D	Only contacts with other stations within the 48 contiguous states

10. - G2C05

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

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

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E02

What is VARA?

Select	Answer
A	A radio direction finding system used on VHF and UHF
B	A digital protocol used with Winlink
C	A DX spotting system using a network of software defined radios
D	A low signal-to-noise digital mode used for EME (moonbounce)

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	VHF/UHF ducting is disturbed
B	VHF/UHF ducting is improved
C	HF communication is disturbed
D	HF communication is improved

14. - G3B11

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

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

15. - G3C03

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

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

16. - G4A08

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

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

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It decreases the loading on circuits being measured
B	It improves the resolution of the readings
C	It allows for higher voltages to be safely measured
D	It improves the frequency response

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Arcing at a poor electrical connection
B	Not using a balun or line isolator to feed balanced antennas
C	Using a balun to feed an unbalanced antenna
D	Lack of rectification of the transmitter’s signal in power conductors

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. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent damage to the battery due to excessive voltage at high illumination levels
B	To limit the current flowing from the panel to a safe value
C	To prevent overload by regulating the charging voltage
D	To prevent discharge of the battery through the panel during times of low or no illumination

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance increases
B	As the amplitude of the applied AC increases, the reactance decreases
C	As the frequency of the applied AC increases, the reactance decreases
D	As the amplitude of the applied AC increases, the reactance increases

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	24 volts
B	12 volts
C	8.5 volts
D	34 volts

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	3.3 millihenries
B	0.30 henries
C	3.3 henries
D	30 millihenries

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor could overheat
B	The resistor’s internal capacitance would detune the circuit
C	The resistor’s tolerance value would not be adequate
D	The resistor’s inductance could make circuit performance unpredictable

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	40 GHz
B	500 MHz
C	4 GHz
D	50 MHz

26. - G7A06

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

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

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	Any RF power amplifier used in conjunction with an amateur transceiver
B	An amplifier in which the output preserves the input waveform
C	A Class C high efficiency amplifier
D	An amplifier used as a frequency multiplier

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Carrier oscillator
B	RF amplifier
C	Filter
D	IF amplifier

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By reconfiguring the CW keying input to act as a tone generator
B	By using a transceiver’s computer data interface protocol to change frequencies
C	By changing an oscillator’s frequency directly with a digital control signal
D	By keying an FM transmitter with a sub-audible tone

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	3 kHz
B	16 kHz
C	8 kHz
D	5 kHz

31. - G8C02

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

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

32. - G9A05

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

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

33. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It is unaffected by the location of the feed point
B	It steadily increases
C	It peaks at about 1/8 wavelength from the end
D	It steadily decreases

34. - G9C08

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

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

35. - G9D02

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

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