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. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	20 meters
C	12 meters
D	30 meters

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	A beacon station may not use automatic control
B	The frequency must be posted on the Internet or published in a national periodical
C	The frequency must be coordinated with the National Beacon Organization
D	There must be no more than one beacon signal transmitting in the same band from the same station location

3. - G1C10

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

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

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	The Federal Communications Commission
C	A Volunteer Examiner Coordinator
D	The Wireless Telecommunications Bureau

5. - G1E05

What types of messages for a third party in another country may be transmitted by an amateur station?

Select	Answer
A	Only messages for other licensed amateurs
B	Only messages relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief
C	Any message, as long as the amateur operator is not paid
D	Any messages, as long as the text of the message is recorded in the station log

6. - G2A09

Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?

Select	Answer
A	Because it is fully compatible with an AM detector
B	Current amateur practice is to use lower sideband on these frequency bands
C	Lower sideband is more efficient than upper sideband at these frequencies
D	Lower sideband is the only sideband legal on these frequency bands

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Approximately 3 kHz
B	Between 150 and 500 Hz
C	Approximately 10 kHz
D	Approximately 6 kHz

8. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 5 wpm
B	A slow speed until contact is established
C	The speed at which the CQ was sent
D	The fastest speed at which you are comfortable copying

9. - G2D10

What is QRP operation?

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

10. - G2E12

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is intensity, time is vertical
B	Frequency is vertical, signal strength is horizontal, time is intensity
C	Frequency is vertical, signal strength is intensity, time is horizontal
D	Frequency is horizontal, signal strength is vertical, time is intensity

11. - G3A11

Approximately how long is the typical sunspot cycle?

Select	Answer
A	11 years
B	40 hours
C	28 days
D	8 minutes

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

13. - G3C03

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

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

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

15. - G4B11

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

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

16. - G4C10

What could be a symptom of a ground loop somewhere in your station?

Select	Answer
A	The SWR reading for one or more antennas is suddenly very high
B	You receive reports of "hum" on your station's transmitted signal
C	An item of station equipment starts to draw excessive amounts of current
D	You receive reports of harmonic interference from your station

17. - G4D03

Which of the following can be the result of an incorrectly adjusted speech processor?

Select	Answer
A	Excessive background pickup
B	All of these choices are correct
C	Splatter
D	Distorted speech

18. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full size antenna?

Select	Answer
A	Harmonic radiation may increase
B	Short antennas can only receive circularly polarized signals
C	Operating bandwidth may be very limited
D	Short antennas are more likely to cause distortion of transmitted signals

19. - G5A01

What is impedance?

Select	Answer
A	The opposition to the flow of current in an AC circuit
B	The force of repulsion between two similar electric fields
C	The inverse of resistance
D	The electric charge stored by a capacitor

20. - G5B12

What would be the RMS voltage across a 50 ohm dummy load dissipating 1200 watts?

Select	Answer
A	692 volts
B	173 volts
C	245 volts
D	346 volts

21. - G5C07

What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?

Select	Answer
A	12.2 to 1
B	300 to 1
C	150 to 1
D	24.4 to 1

22. - G6A02

What is an advantage of the low internal resistance of nickel-cadmium batteries?

Select	Answer
A	Long life
B	Rapid recharge
C	High discharge current
D	High voltage

23. - G6B13

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

Select	Answer
A	PL-259
B	DB-25
C	RJ-11
D	Octal

24. - G7A13

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

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

25. - G7B06

What is a shift register?

Select	Answer
A	A clocked array of circuits that passes data in steps along the array
B	An array of operational amplifiers used for tri-state arithmetic operations
C	An analog mixer
D	A digital mixer

26. - G7C05

Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Select	Answer
A	Variable frequency with the stability of a crystal oscillator
B	Wide tuning range and no need for band switching
C	Relatively low power consumption
D	Relatively high power output

27. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency convolution
B	Frequency transformation
C	Frequency conversion
D	Frequency modulation

28. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	5 kHz
B	16 kHz
C	3 kHz
D	8 kHz

29. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 5-bit code with additional start and stop bits
B	A 7-bit code with start, stop and parity bits
C	A code using error detection and correction
D	A code using SELCAL and LISTEN

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 length of the line
B	The distance between the centers of the conductors and the radius of the conductors
C	The radius of the conductors and the frequency of the signal
D	The frequency of the signal 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	Shorten the radials
B	Slope the radials downward
C	Lengthen the radials
D	Slope the radials upward

32. - G9C18

What happens when the feed point of a quad antenna of any shape is moved from the midpoint of the top or bottom to the midpoint of either side?

Select	Answer
A	The polarization of the radiated signal changes from vertical to horizontal
B	The polarization of the radiated signal changes from horizontal to vertical
C	The radiated signal becomes circularly polarized
D	There is no change in polarization

33. - G9D07

Which of the following describes a log periodic antenna?

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

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It heats body tissue
B	It causes the blood count to reach a dangerously low level
C	It causes radiation poisoning
D	It cools body tissue

35. - G0B04

Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

Select	Answer
A	Danger of engine over torque
B	Danger of carbon monoxide poisoning
C	Lack of nitrogen for adequate combustion
D	Lack of oxygen for adequate combustion

Figure G7-1