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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An oscilloscope with a high-stability crystal marker generator
B	A receiver with digital signal processing (DSP) noise reduction
C	An SWR meter with a peak-reading function
D	A calibrated field strength meter with a calibrated antenna

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	30 amperes
B	15 amperes
C	25 amperes
D	20 amperes

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 may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
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. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The control operator
B	The FCC
C	The IEEE
D	The ITU

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	200 watts PEP output
C	1500 watts PEP output
D	50 watts PEP output

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Federal Communications Commission
B	A Volunteer Examiner Coordinator
C	The Universal Licensing System
D	The Wireless Telecommunications Bureau

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

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Attenuator level
B	Antenna inductance or capacitance
C	Transmit audio or microphone gain
D	RF clipping level

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
B	Decrease power and continue to transmit
C	Advise the interfering stations that you are on the frequency and that you have priority
D	Switch to the opposite sideband

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Change frequency
B	Repeat everything twice
C	Increase your power
D	Send slower

11. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare vertical and horizontal signal strengths on the input frequency
B	Compare signal strengths between the input and output of the repeater
C	All these choices are correct
D	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	A wireless network capable of both VHF and HF band operation
B	A form of Packet Radio
C	An amateur radio wireless network to send and receive email on the internet
D	All of the above

13. - G3A12

What does the K-index measure?

Select	Answer
A	The relative position of sunspots on the surface of the Sun
B	The short-term stability of the Sun’s magnetic field
C	The solar radio flux at Boulder, Colorado
D	The short-term stability of Earth’s geomagnetic field

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency during a 24-hour period
B	Lowest Usable Frequency for communications to any point outside a 100-mile radius
C	The Lowest Usable Frequency for communications between two specific points
D	Lowest Usable Frequency during the past 60 minutes

15. - G3C11

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

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

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	More stations can be accommodated within a given signal passband
B	It may be possible to reduce or eliminate interference from other signals
C	Accidental out-of-band operation can be prevented
D	Interference from impulse noise will be eliminated

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Complex impedances can be easily measured
B	Complex waveforms can be measured
C	Greater precision
D	An oscilloscope uses less power

18. - G4C02

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

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

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.178 MHz to 7.181 MHz
B	7.1765 MHz to 7.1795 MHz
C	7.175 MHz to 7.178 MHz
D	7.178 MHz to 7.184 MHz

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To reduce RF voltage discharge from the tip of the antenna while transmitting
B	To narrow the operating bandwidth of the antenna
C	To reduce the chance of damage if the antenna should strike an object
D	To increase the “Q” of the antenna

21. - G5A03

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

Select	Answer
A	Reactance
B	Reluctance
C	Admittance
D	Conductance

22. - G5B03

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

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

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	0.07 microfarads
B	70 microfarads
C	14.3 microfarads
D	1,000 microfarads

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is separated from the channel by a thin insulating layer
B	The gate is formed by a back-biased junction
C	The source is separated from the drain by a thin insulating layer
D	The source is formed by depositing metal on silicon

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	In the tunnel-effect region
C	Forward biased
D	Reverse biased

26. - G7A03

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

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

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

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

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in a single sideband receiver to extract the modulated signal
B	Used in transmitter to perform frequency multiplication
C	Used in an FM receiver to filter out unwanted sidebands
D	Used in test gear to detect spurious mixing products

29. - G8A13

What is a link budget?

Select	Answer
A	The financial costs associated with operating a radio link
B	The sum of transmit power and antenna gains minus system losses as seen at the receiver
C	The sum of antenna gains minus system losses
D	The difference between transmit power and receiver sensitivity

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Synthesizing
B	Phase inversion
C	Frequency inversion
D	Heterodyning

31. - G8C03

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

Select	Answer
A	Directory
B	Trailer
C	Header
D	Preamble

32. - G9A05

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

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

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 peaks at about 1/8 wavelength from the end
C	It steadily decreases
D	It steadily increases

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	1/4 wavelength
B	1 wavelength
C	3/4 wavelength
D	1/2 wavelength

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	Opposite the feed point
B	On the same side as the feed point
C	Broadside to the plane of the halo
D	Omnidirectional in the plane of the halo