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

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	They must be bonded together with all other grounds
B	They must be bonded to all buried water and gas lines
C	Bends in ground wires must be made as close as possible to a right angle
D	Lightning grounds must be connected to all ungrounded wiring

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	12 meters
B	160 meters
C	17 meters
D	30 meters

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country
B	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
C	Only when the foreign country has a formal third-party agreement filed with the FCC
D	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must hold an FCC granted amateur radio license of General class or above
B	The person’s home citizenship must be in ITU region 2
C	The person must be a resident of the US for a minimum of 5 years
D	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner

7. - G1E06

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

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

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	Less subject to interference from atmospheric static crashes
C	Ease of tuning on receive and immunity to impulse noise
D	Less bandwidth used and greater power efficiency

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per month
B	No more than 2 hours per month
C	No more than 1 hour per week
D	No more than 2 hours per week

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	Closing station now
C	Operating full break-in
D	Listening only for a specific station or stations

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the angle at which an amateur satellite crosses the equator
B	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
C	A map that shows true bearings and distances from a specific location
D	A map that shows accurate land masses

12. - G2E02

What is VARA?

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

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	At any point
B	At the summer solstice
C	Only at the maximum point
D	Only at the minimum point

14. - G3B08

What does MUF stand for?

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

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Signals are scattered from the magnetosphere, which is not a good reflector
B	Propagation is via ground waves, which absorb most of the signal energy
C	Only a small part of the signal energy is scattered into the skip zone
D	Propagation is via ducts in the F region, which absorb most of the energy

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To prevent excessive drive
B	To increase overall efficiency
C	To reduce harmonic radiation
D	To balance the transmitter audio frequency response

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 improves the frequency response
D	It allows for higher voltages to be safely measured

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	You receive reports of harmonic interference from your station
C	The SWR reading for one or more antennas is suddenly very high
D	You receive reports of “hum” on your station’s transmitted signal

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 1 kHz below the edge of the segment
B	At least 1 kHz above the edge of the segment
C	At least 3 kHz below the edge of the segment
D	At least 3 kHz above the edge of the segment

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The fuel delivery system
B	All these choices are correct
C	The control computers
D	The battery charging system

21. - G5A08

What is impedance?

Select	Answer
A	The product of current and reactance
B	The product of current and voltage
C	The ratio of current to voltage
D	The ratio of voltage to current

22. - G5B04

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

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

23. - G5C10

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

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

24. - G6A06

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

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

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	Its thickness
C	The composition, or “mix,” of materials used
D	Its conductivity

26. - G7A05

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

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

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class A
B	Class C
C	Class AB
D	Class B

28. - G7C10

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

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

29. - G8A01

How is direct binary FSK modulation generated?

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

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Odd-order
B	Second harmonics
C	Intercept point
D	Even-order

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Trailer
B	Header
C	Directory
D	Preamble

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

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Front-to-back ratio decreases
B	Resonant frequency is lower
C	Beamwidth increases
D	Gain increases

35. - G9D08

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

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