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

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	At the closest power pole ground electrode
B	Where the feed lines enter the building
C	On the antenna, opposite the feed point
D	In series with each ground lead

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 not cause harmful interference to primary users and must accept interference from primary users
C	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
D	Amateur stations may use the band only during emergencies

4. - G1B10

What is the power limit for beacon stations?

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

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

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

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	A license from the foreign country and a special remote station permit from the FCC
B	A US operator/primary station license
C	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
D	Only an appropriate US operator/primary license and a special remote station permit from the FCC

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	They must relate to emergencies or disaster relief
B	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log
D	They must be for other licensed amateurs

8. - G2A04

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

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

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	2 kHz to 3 kHz
B	5 Hz to 50 Hz
C	Approximately 6 kHz
D	150 Hz to 500 Hz

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	You are sending too fast
B	There is interference on the frequency
C	I am ready to receive
D	I am quitting for the day

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows accurate land masses
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 the angle at which an amateur satellite crosses the equator

12. - G2E06

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

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

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 Earth’s geomagnetic field
C	The solar radio flux at Boulder, Colorado
D	The short-term stability of the Sun’s magnetic field

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	A slightly delayed echo might be heard
B	Periodic fading approximately every 10 seconds
C	Signal strength increased by 3 dB
D	The signal might be cancelled causing severe attenuation

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Energy is scattered into the skip zone through several different paths
B	Ground waves are absorbing much of the signal
C	The E region is not present
D	The ionospheric region involved is unstable

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By reducing receiver gain during a noise pulse
B	By temporarily increasing received bandwidth
C	By clipping noise peaks
D	By redirecting noise pulses into a filter capacitor

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	An oscilloscope uses less power
D	Greater precision

18. - G4C03

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

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

19. - G4D04

What does an S meter measure?

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

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Shunt
B	Bypass
C	Full-wave bridge
D	Series-parallel

21. - G5A01

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

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

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The peak value
B	The peak-to-peak value
C	The RMS value
D	The reciprocal of the RMS value

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	33.3 microfarads
B	0.33 microfarads
C	300 microfarads
D	3.0 microfarads

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	Inexpensive RF capacitor
B	Tight tolerance
C	High capacitance for a given volume
D	Much less leakage than any other type

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A low noise figure VHF connector
B	A moisture-resistant RF connector useful to 10 GHz
C	A small bayonet connector used for data circuits
D	A nickel plated version of the PL-259

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 5
B	Symbol 11
C	Symbol 4
D	Symbol 1

27. - G7B05

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

Select	Answer
A	3
B	8
C	6
D	16

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Filtering
B	All these choices are correct
C	Modulation
D	Detection

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase convolution
B	Phase transformation
C	Phase inversion
D	Phase modulation

30. - G8B03

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

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

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	High and low
B	Dot and dash
C	On and off
D	Mark and space

32. - G9A06

In what units is RF feed line loss usually expressed?

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

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Bi-directional in azimuth
B	Omnidirectional in azimuth
C	Hemispherical
D	Isotropic

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

35. - G9D02

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

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

Figure G7-1