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

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the neutral wire
B	Only the hot wires
C	All wires
D	Only the ground wire

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	All HF bands
D	80 meters, 40 meters, 20 meters, and 15 meters

4. - G1B04

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

Select	Answer
A	Occasional retransmission of weather and propagation forecast information from US government stations
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	Encrypted messages, if not intended to facilitate a criminal act

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

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	180 days
B	For as long as your current license is valid
C	365 days
D	30 days

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Under any circumstances in which third party messages are permitted by FCC rules
B	Under no circumstances except for emergencies
C	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
D	Only when the message is intended for licensed radio amateurs

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Except during emergencies, no amateur station has priority access to any frequency
B	Contest operations should yield to non-contest use of frequencies
C	QSOs in progress have priority
D	Nets have priority

10. - G2C03

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

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

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Identify your station according to normal FCC regulations
B	Send a QSL card to the stations worked, or QSL via Logbook of The World
C	All these choices are correct
D	Submit a log to the contest sponsor

12. - G2E06

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

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

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
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	A zero sunspot number indicates undisturbed conditions

14. - G3B10

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the E region?

Select	Answer
A	12,000 miles
B	2,500 miles
C	180 miles
D	1,200 miles

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

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To allow transmitting on two frequencies at once
B	To permit full duplex operation -- that is, transmitting and receiving at the same time
C	To transmit on one frequency and listen on another
D	To improve frequency accuracy by allowing variable frequency output (VFO) operation

17. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Less prone to overload
B	Better for measuring computer circuits
C	Higher precision
D	Faster response

18. - G4C03

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

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

19. - G4D04

What does an S meter measure?

Select	Answer
A	Transmitter power output
B	Impedance
C	Received signal strength
D	Carrier suppression

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

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Impedance is equal to the arithmetic mean of the inductance and capacitance
B	Impedance is equal to the geometric mean of the inductance and capacitance
C	Resonance causes impedance to be very low
D	Resonance causes impedance to be very high

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 3 dB
B	Approximately 9 dB
C	Approximately 6 dB
D	Approximately 2 dB

23. - G5C04

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

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

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Screen grid
B	Trigger electrode
C	Control grid
D	Suppressor grid

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. - G7A06

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

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

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	8
B	6
C	3
D	16

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To minimize radiation resistance
B	To present the desired impedance to the transmitter and feed line
C	To minimize transmitter power output
D	To reduce power supply ripple

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Pulse modulation
B	Amplitude modulation
C	Multiplex modulation
D	Phase modulation

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	5 kHz
B	101.75 Hz
C	60 kHz
D	416.7 Hz

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	FT8, FT4, and FST4
B	Winlink, PACTOR II, and PACTOR III
C	DMR, D-STAR, and SystemFusion
D	WSPR, MFSK16, and EasyPAL

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 100 feet
B	Decibels per 1,000 feet
C	Ohms per 1,000 feet
D	Ohms per 100 feet

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower radiation resistance
B	Lower feed point impedance
C	Lower ground losses
D	Shorter radials

34. - G9C08

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

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

35. - G9D08

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

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