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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	1875 kHz
B	3900 kHz
C	3750 kHz
D	4005 kHz

2. - G1B07

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

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

3. - 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

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

5. - G1E13

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Anywhere in the 1.25-meter or shorter wavelength bands, and in specified segments of the 80-meter through 2-meter bands
B	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
C	Only in the non-phone Extra Class segments of the bands
D	On any band segment where digital operation is permitted

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	As a common courtesy, move your contact to another frequency
B	Increase power to overcome interference
C	Tell the interfering stations to change frequency
D	Report the interference to your local Amateur Auxiliary Coordinator

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Operating full break-in
C	Listening for novice stations
D	Closing station now

9. - G2D04

Which of the following describes an azimuthal projection map?

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

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	USB
B	SSB
C	DSB
D	LSB

11. - G3A04

Which of the following are least reliable for long distance communications during periods of low solar activity?

Select	Answer
A	30 meters and 20 meters
B	80 meters and 160 meters
C	15 meters, 12 meters and 10 meters
D	60 meters and 40 meters

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are bent and trapped in the ionosphere to circle the Earth
B	They are completely absorbed by the ionosphere
C	They pass through the ionosphere
D	They are bent back to the Earth

13. - G3C03

Why is the F2 region mainly responsible for the longest distance radio wave propagation?

Select	Answer
A	Because it is the densest ionospheric layer
B	Because it is the highest ionospheric region
C	Because it does not absorb radio waves as much as other ionospheric regions
D	All of these choices are correct

14. - G4A01

What is the purpose of the "notch filter" found on many HF transceivers?

Select	Answer
A	To restrict the transmitter voice bandwidth
B	To reduce interference from carriers in the receiver passband
C	To enhance the reception of a specific frequency on a crowded band
D	To eliminate receiver interference from impulse noise sources

15. - G4B02

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

Select	Answer
A	Input impedance is much lower
B	Complex impedances can be easily measured
C	An oscilloscope uses less power
D	Complex waveforms can be measured

16. - G4C12

Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?

Select	Answer
A	Fewer digital components are required
B	Mixing products are greatly reduced
C	The DSP filter is much more effective at VHF frequencies
D	A wide range of filter bandwidths and shapes can be created

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 less powerful
C	It is 100 times more powerful
D	It is 20 times more powerful

18. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To allow automatic band changing
B	To electrically lengthen a physically short antenna
C	To increase the power handling capacity of a whip antenna
D	To allow remote tuning

19. - G5A05

How does an inductor react to AC?

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

20. - G5B01

What dB change represents a two-times increase or decrease in power?

Select	Answer
A	Approximately 6 dB
B	Approximately 3 dB
C	Approximately 12 dB
D	Approximately 2 dB

21. - G5C12

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

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

22. - G6A08

Why must the cases of some large power transistors be insulated from ground?

Select	Answer
A	To improve the power dissipation capability
B	To reduce stray capacitance
C	To avoid shorting the collector or drain voltage to ground
D	To increase the beta of the transistor

23. - G6B01

Which of the following is an analog integrated circuit?

Select	Answer
A	Frequency Counter
B	Linear voltage regulator
C	Microprocessor
D	NAND Gate

24. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 11
B	Symbol 1
C	Symbol 7
D	Symbol 6

25. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	AM
B	All of these choices are correct
C	CW
D	SSB

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Select	Answer
A	Balanced modulator
B	Discriminator
C	IF amplifier
D	Detector

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient audio
B	Excessive bandwidth
C	Frequency drift
D	Insufficient bandwidth

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

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

29. - G8C05

In the PACTOR protocol, what is meant by an NAK response to a transmitted packet?

Select	Answer
A	The entire file has been received correctly
B	The receiver is requesting the packet be retransmitted
C	The receiver is busy decoding the packet
D	The receiver is reporting the packet was received without error

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 distance between the centers of the conductors and the length of the line
D	The frequency of the signal and the length of the line

31. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	At the center of the antenna
B	As high as possible above the ground
C	On the surface of the Earth or buried a few inches below the ground
D	Parallel to the antenna element

32. - G9C05

How does increasing boom length and adding directors affect a Yagi antenna?

Select	Answer
A	Front to back ratio decreases
B	Front to side ratio decreases
C	Gain increases
D	Beamwidth increases

33. - G9D03

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

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

34. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Change to a non-polarized antenna with higher gain
B	Take precautions to ensure that the antenna cannot be pointed in their direction
C	Use an antenna with a higher front-to-back ratio
D	Post a warning sign that is clearly visible to the neighbor

35. - G0B06

Why must the metal enclosure of every item of station equipment be grounded?

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

Figure G7-1