US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A09

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

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

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	Fuel should be stored near the generator for rapid refueling in case of an emergency
B	All these choices are correct
C	The generator must be insulated from ground
D	The generator should be operated in a well-ventilated area

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 use the band only during emergencies
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 may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
D	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users

4. - G1B04

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

Select	Answer
A	Automatic retransmission of other amateur signals by any amateur station
B	Encrypted messages, if not intended to facilitate a criminal act
C	Unidentified transmissions of less than 10 seconds duration for test purposes only
D	Occasional retransmission of weather and propagation forecast information from US government stations

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	1.8 kHz
B	5.6 kHz
C	2.8 kHz
D	3 kHz

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of both the remote station’s country and the FCC
B	Only those of the FCC
C	Only those of the remote station’s country
D	Those of the remote station’s country and the FCC’s third-party regulations

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 amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
B	They must be for other licensed amateurs
C	They must relate to emergencies or disaster relief
D	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

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Acknowledge the station in distress and determine what assistance may be needed
C	Immediately cease all transmissions
D	Inform your local emergency coordinator

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Sending without error
B	Matching the transmit frequency to the frequency of a received signal
C	Operating split to avoid interference on frequency
D	Matching the speed of the transmitting station

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Toward the north
B	180 degrees from the station’s short-path heading
C	Toward the rising sun
D	Along the gray line

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	Printer/Server
B	RJ-45
C	Terminal Node Controller
D	Gateway

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	A zero sunspot number indicates undisturbed conditions
B	A zero sunspot number indicates that radio propagation is not possible on any band
C	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
D	Lower sunspot numbers generally indicate greater probability of sporadic E propagation

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	The signal might be cancelled causing severe attenuation
D	Signal strength increased by 3 dB

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The long path azimuth of a distant station
B	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
C	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The short path azimuth of a distant station

16. - G4A03

How does a noise blanker work?

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

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	An oscilloscope
B	A field strength meter
C	A wavemeter
D	A sidetone monitor

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It prevents signal overload
B	It prevents a blown fuse in the event of an internal short circuit
C	It ensures that the neutral wire is grounded
D	It ensures that hazardous voltages cannot appear on the chassis

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 8 times
B	Approximately 2 times
C	Approximately 4 times
D	Approximately 1.5 times

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The socket is not wired with an RF-shielded power cable
B	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
C	The socket’s wiring may be inadequate for the current drawn by the transceiver
D	Drawing more than 50 watts from this socket could cause the engine to overheat

21. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the frequency of the applied AC increases, the reactance increases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the amplitude of the applied AC increases, the reactance increases

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	400 watts
B	353.5 watts
C	1.4 watts
D	100 watts

23. - G5C09

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

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

24. - G6A09

Which of the following describes MOSFET construction?

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

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 6
B	Symbol 4
C	Symbol 1
D	Symbol 7

27. - G7B05

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

Select	Answer
A	16
B	8
C	6
D	3

28. - G7C10

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	All these choices are correct
B	Its bandwidth is approximately the same as BPSK31
C	It is sideband sensitive
D	Its encoding provides error correction

30. - G8B03

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

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

31. - G8C15

What does an FT8 signal report of +3 mean?

Select	Answer
A	The signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth
B	The signal is S3 (weak signals)
C	The signal is 3 times the noise level of an equivalent SSB signal
D	The signal is 3 dB over S9

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	A difference between feed line impedance and antenna feed point impedance
B	Operating an antenna at its resonant frequency
C	Using more transmitter power than the antenna can handle
D	Feeding the antenna with unbalanced feed line

33. - G9B03

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

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

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 1.5 dB higher
B	Approximately 6 dB higher
C	Approximately 9 dB higher
D	Approximately 3 dB higher

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A vertical dipole placed at approximately 1/2 wavelength above the ground
B	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
C	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
D	A horizontal dipole placed at approximately 1/2 wavelength above the ground

Figure G7-1