US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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1. - G1A07

Which of the following frequencies is within the General Class portion of the 20-meter phone band?

Select	Answer
A	14005 kHz
B	14305 kHz
C	14105 kHz
D	14405 kHz

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	Only "Q" signals are permitted
B	Only "10 codes" are permitted
C	They may be used if they do not obscure the meaning of a message
D	They are not permitted

3. - G1C09

What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?

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

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	Only the Technician band segments until your upgrade is posted in the FCC database
B	On any General or Technician Class band segment
C	Only on the Technician band segments until your license arrives in the mail
D	On any General or Technician Class band segment except 30-meters and 60-meters

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Countries in ITU Region 2
B	Any country which is not a member of the International Amateur Radio Union (IARU)
C	Countries in ITU Region 1
D	Every foreign country, unless there is a third party agreement in effect with that country

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Frequency modulation
B	Double sideband
C	Single sideband
D	Phase modulation

7. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	When they seize your equipment for use in disaster communications
B	When the President's War Emergency Powers have been invoked
C	Only when all amateur stations are instructed to stop transmitting
D	When they declare a temporary state of communication emergency

8. - G2C01

Which of the following describes full break-in telegraphy (QSK)?

Select	Answer
A	Automatic keyers are used to send Morse code instead of hand keys
B	An operator must activate a manual send/receive switch before and after every transmission
C	Transmitting stations can receive between code characters and elements
D	Breaking stations send the Morse code prosign BK

9. - G2D10

What is QRP operation?

Select	Answer
A	Traffic relay procedure net operation
B	Low power transmit operation
C	Remote piloted model control
D	Transmission using Quick Response Protocol

10. - G2E06

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

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

11. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A sudden drop in the solar flux index
B	Ripples in the ionosphere
C	A thunderstorm which affects radio propagation
D	A temporary disturbance in the Earth's magnetosphere

12. - G3B08

What does MUF stand for?

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

13. - G3C05

Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?

Select	Answer
A	The E layer is unstable during daylight hours
B	The F layer is unstable during daylight hours
C	The F layer absorbs signals at these frequencies during daylight hours
D	The D layer absorbs signals at these frequencies during daylight hours

14. - G4A05

What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?

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

15. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	All of these choices are correct
B	Receiver
C	Antenna and feed line
D	Transmitter

16. - G4C11

Which of the following is a function of a digital signal processor?

Select	Answer
A	To provide adequate grounding
B	To increase antenna bandwidth
C	To increase antenna gain
D	To remove noise from received signals

17. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 10 times less powerful
B	It is 20 times more powerful
C	It is 100 times more powerful
D	It is 20 times less powerful

18. - G4E07

Which of the following may cause interference to be heard in the receiver of an HF radio installed in a recent model vehicle?

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

19. - G5A03

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

Select	Answer
A	Reluctance
B	Conductance
C	Reactance
D	Admittance

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	25.9 percent
B	10.9 percent
C	20.5 percent
D	12.2 percent

21. - G5C11

What is the inductance of a 20 millihenry inductor connected in series with a 50 millihenry inductor?

Select	Answer
A	1000 millihenrys
B	0.07 millihenrys
C	70 millihenrys
D	14.3 millihenrys

22. - G6A14

Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?

Select	Answer
A	High stability
B	Tight tolerance
C	High capacitance for given volume
D	Comparatively low cost

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A DC power connector rated for currents between 30 and 50 amperes
B	A special watertight connector for use in marine applications
C	A family of multiple circuit connectors suitable for audio and control signals
D	A special connector for microwave interfacing

24. - G7A04

What is the peak-inverse-voltage across the rectifier in a half-wave power supply?

Select	Answer
A	Two times the normal peak output voltage of the power supply
B	One-half the normal output voltage of the power supply
C	One-half the normal peak output voltage of the power supply
D	Equal to the normal output voltage of the power supply

25. - G7B01

Complex digital circuitry can often be replaced by what type of integrated circuit?

Select	Answer
A	Phase detector
B	Microcontroller
C	Charge-coupled device
D	Window comparator

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Phase inverter
B	Product detector
C	Mixer
D	Discriminator

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Frequency modulation
C	Single sideband
D	Double sideband

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Higher symbol rates require wider bandwidth
B	Symbol rate and bandwidth are not related
C	Lower symbol rates require wider bandwidth
D	Bandwidth is always half the symbol rate

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By transmitting redundant information with the data
B	By using the varicode character set
C	By controlling transmitter output power for optimum signal strength
D	By using a parity bit with each character

30. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The radius of the conductors and the frequency of the signal
C	The frequency of the signal and the length of the line
D	The distance between the centers of the conductors and the length of the line

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Slope the radials upward
B	Shorten the radials
C	Slope the radials downward
D	Lengthen the radials

32. - G9C10

Which of the following is a Yagi antenna design variable that could be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth?

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

33. - G9D03

At what height above ground is an NVIS antenna typically installed?

Select	Answer
A	Between 1/10 and 1/4 wavelength
B	As close to one wavelength as possible
C	Height is not critical as long as it is significantly more than 1/2 wavelength
D	As close to 1/2 wavelength as possible

34. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations when transmitter power exceeds levels specified in FCC Part 97.13?

Select	Answer
A	All of these choices are correct
B	Post a copy of FCC Part 97.13 in the station
C	Perform a routine RF exposure evaluation
D	Post a copy of OET Bulletin 65 in the station

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	All wires
B	Only the neutral wire
C	Only the two wires carrying voltage
D	Only the ground wire