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. - G1A14

In what ITU region is operation in the 7.175 to 7.300 MHz band permitted for a control operator holding an FCC issued General Class license?

Select	Answer
A	All three regions
B	Region 2
C	Region 1
D	Region 3

2. - G1B09

When may an amateur station transmit communications in which the licensee or control operator has a pecuniary (monetary) interest?

Select	Answer
A	When other amateurs are being notified of the sale of any item with a monetary value less than $200 and such activity is not done on a regular basis
B	Never
C	When other amateurs are being notified of the sale of apparatus normally used in an amateur station and such activity is not done on a regular basis
D	Only when there is no other means of communications readily available

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	19.6 kilobaud
B	1200 baud
C	300 baud
D	56 kilobaud

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	30 days
B	180 days
C	365 days
D	For as long as your current license is valid

5. - G1E13

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

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

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	Lower sideband
B	Double sideband
C	Vestigial sideband
D	Upper sideband

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Listen for 2 minutes before calling CQ
B	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
C	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response
D	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	Send more slowly
B	I am troubled by static
C	Zero beat my signal
D	Stop sending

9. - G2D10

What is QRP operation?

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

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send an email to the system control operator
B	Respond when the station broadcasts its SSID
C	Transmit a connect message on the station's published frequency
D	Send QRL in Morse code

11. - G3A06

What is a geomagnetic storm?

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

12. - G3B01

How might a sky-wave signal sound if it arrives at your receiver by both short path and long path propagation?

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

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 D layer absorbs signals at these frequencies during daylight hours
C	The F layer absorbs signals at these frequencies during daylight hours
D	The F layer is unstable during daylight hours

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

Select	Answer
A	ALC will invert the modulation of the AFSK mode
B	When using digital modes, too much ALC activity can cause the transmitter to overheat
C	Improper action of ALC distorts the signal and can cause spurious emissions
D	All of these choices are correct

15. - G4B05

Why is high input impedance desirable for a voltmeter?

Select	Answer
A	It decreases the loading on circuits being measured
B	It improves the resolution of the readings
C	It improves the frequency response
D	It decreases battery consumption in the meter

16. - G4C11

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

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

17. - G4D06

Where is an S meter found?

Select	Answer
A	In a transmitter
B	In a receiver
C	In a conductance bridge
D	In an SWR bridge

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from 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

19. - G5A06

How does a capacitor react to AC?

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

20. - G5B11

What is the ratio of peak envelope power to average power for an unmodulated carrier?

Select	Answer
A	1.414
B	1.00
C	0.707
D	2.00

21. - G5C02

What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?

Select	Answer
A	Additional resistance must be added in parallel with the secondary to prevent overload
B	Additional resistance must be added in series with the primary to prevent overload
C	The transformer no longer functions as it is a unidirectional device
D	The secondary voltage becomes 4 times the primary voltage

22. - G6A19

How should the winding axes of two solenoid inductors be oriented to minimize their mutual inductance?

Select	Answer
A	Parallel to each other
B	In line
C	At right angles to each other
D	Interleaved

23. - G6B11

What is a microprocessor?

Select	Answer
A	A computer on a single integrated circuit
B	A low voltage amplifier used in a microwave transmitter modulator stage
C	A low power analog signal processor used as a microwave detector
D	A microwave detector, amplifier, and local oscillator on a single integrated circuit

24. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	360 degrees
B	270 degrees
C	90 degrees
D	180 degrees

25. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Divide the RF output power by the DC input power
C	Divide the DC input power by the DC output power
D	Add the RF input power to the DC output power

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	Mixer
B	Product detector
C	Phase inverter
D	Discriminator

27. - G8A01

How is an FSK signal generated?

Select	Answer
A	By using a transceiver's computer data interface protocol to change frequencies
B	By keying an FM transmitter with a sub-audible tone
C	By changing an oscillator's frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

28. - G8B03

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

Select	Answer
A	Cancellation
B	Synthesizing
C	Phase inverting
D	Heterodyning

29. - G8C09

What does the number 31 represent in "PSK31"?

Select	Answer
A	The version of the PSK protocol
B	The year in which PSK31 was invented
C	The approximate transmitted symbol rate
D	The number of characters that can be represented by PSK31

30. - G9A09

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 200 ohm impedance?

Select	Answer
A	1:2
B	1:4
C	4:1
D	2:1

31. - 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 steadily decreases
B	It is unaffected by the location of the feed point
C	It steadily increases
D	It peaks at about 1/8 wavelength from the end

32. - G9C06

What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?

Select	Answer
A	There must be an open circuit in the driven element at the point opposite the feed point
B	The reflector element must be approximately 5 percent longer than the driven element
C	The driven element must be fed with a balun transformer
D	The reflector element must be approximately 5 percent shorter than the driven element

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	SWR varies periodically as a function of boom length
B	Impedance varies periodically as a function of frequency
C	Length and spacing of the elements increase logarithmically from one end of the boom to the other
D	Gain varies logarithmically as a function of frequency

34. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	All of these choices are correct
B	By measurement of field strength using calibrated equipment
C	By calculation based on computer modeling
D	By calculation based on FCC OET Bulletin 65

35. - G0B13

What must you do when powering your house from an emergency generator?

Select	Answer
A	Insure that the generator is not grounded
B	Insure that all lightning grounds are disconnected
C	All of these choices are correct
D	Disconnect the incoming utility power feed