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. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
B	A lower duty cycle permits greater power levels to be transmitted
C	A higher duty cycle permits greater power levels to be transmitted
D	High duty cycle transmitters are exempt from RF exposure requirements

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 12
B	AWG number 16
C	AWG number 20
D	AWG number 8

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
C	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
D	Amateur stations may use the band only during emergencies

4. - G1B10

What is the power limit for beacon stations?

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

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third-party traffic
B	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
C	You must keep a record of the date, time, frequency, power level, and stations worked
D	You must keep a record of the manufacturer of your equipment and the antenna used

6. - G1D01

Who may receive partial credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago
B	Any person who can demonstrate that they once held an FCC-issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC
C	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
D	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license

7. - G1E06

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

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

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Only a RACES net control operator
B	Only a person holding an FCC-issued amateur operator license
C	Any control operator when normal communication systems are operational
D	A person holding an FCC-issued amateur operator license or an appropriate government official

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Closing station now
C	Operating full break-in
D	No US stations should call

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide DX spotting reports to aid contesters and DXers
B	To provide real time propagation data by monitoring amateur radio transmissions worldwide
C	To provide FM repeater coverage in remote areas
D	To provide high-speed data services during an emergency or community event

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Reduce long delayed echoes
B	Creates auroras that can reflect VHF signals
C	Increases signal strength for HF signals passing through the polar regions
D	Improve HF long path propagation

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Minimum Usable Frequency during a 24-hour period
B	The Maximum Usable Frequency during a 24-hour period
C	The Minimum Usable Frequency for communications between two points
D	The Maximum Usable Frequency for communications between two points

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The D region absorbs signals at these frequencies during daylight hours
B	The F region absorbs signals at these frequencies during daylight hours
C	The E region is unstable during daylight hours
D	The F region is unstable during daylight hours

16. - G4A08

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

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

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. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	Insulated wire has been used for the ground wire
B	Flat braid rather than round wire has been used for the ground wire
C	The ground rod is resonant
D	The ground wire has high impedance on that frequency

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 10 times less powerful
B	It is 100 times more powerful
C	It is 20 times less powerful
D	It is 20 times more powerful

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To reduce radiation resistance
B	To electrically lengthen a physically short antenna
C	To lower the radiation angle
D	To increase the power handling capacity of a whip antenna

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Reluctance
C	Admittance
D	Reactance

22. - G5B04

How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	6 watts
B	60 watts
C	2.4 watts
D	24 watts

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. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	1.0 volts
B	0.3 volts
C	0.7 volts
D	0.1 volt

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	The ratio of outer diameter to inner diameter
B	The composition, or “mix,” of materials used
C	Its conductivity
D	Its thickness

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Full-wave
B	Synchronous
C	Full-wave bridge
D	Half-wave

27. - G7B01

What is the purpose of neutralizing an amplifier?

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

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	All types of modulation can be created with appropriate processing
B	Automatic conversion of the signal from digital to analog
C	The need for high resolution analog-to-digital converters is eliminated
D	Minimum detectible signal level is reduced

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Excessive bandwidth
B	Insufficient audio
C	Insufficient bandwidth
D	Frequency drift

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Higher symbol rates require wider bandwidth
B	Bandwidth is half the symbol rate
C	Symbol rate and bandwidth are not related
D	Lower symbol rates require wider bandwidth

31. - G8C02

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

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

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	2:1
C	5:1
D	1:5

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It has a pair of lobes on one side of the antenna and a single lobe on the other side
B	It is a circle (equal radiation in all directions)
C	It is a figure-eight off both ends of the antenna
D	It is a figure-eight at right angles to the antenna

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	All these choices are correct
B	The spacing of each element along the boom
C	The physical length of the boom
D	The number of elements on the boom

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying its body capacitance
B	By varying the base loading inductance
C	By extending and retracting the whip
D	By deploying a capacitance hat