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. - G1B02

With which of the following conditions must beacon stations comply?

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

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

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	Only in the non-phone Extra Class segments of the bands
C	On any band segment where digital operation is permitted
D	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands

6. - G2A04

Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?

Select	Answer
A	Vestigial sideband
B	Lower sideband
C	Upper sideband
D	Double 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	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
B	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response
C	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
D	Listen for 2 minutes before calling CQ

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	Send slower
B	We have worked before
C	We have already confirmed by card
D	I acknowledge receipt

9. - G2D08

What is a reason why many amateurs keep a station log?

Select	Answer
A	To help with a reply if the FCC requests information
B	The ITU requires a log of all international contacts
C	The log provides evidence of operation needed to renew a license without retest
D	The ITU requires a log of all international third party traffic

10. - G2E10

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

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

11. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	At any point in the solar cycle
B	Only at the maximum point of the solar cycle
C	At the summer solstice
D	Only at the minimum point of the solar cycle

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Check the strength of signals in the MF AM broadcast band
B	Check the strength of TV signals from Western Europe
C	Send a series of dots on the band and listen for echoes from your signal
D	Listen for signals from an international beacon in the frequency range you plan to use

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

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

14. - G4A03

What is normally meant by operating a transceiver in "split" mode?

Select	Answer
A	The radio is operating at half power
B	The transmitter is emitting an SSB signal, as opposed to DSB operation
C	The transceiver is set to different transmit and receive frequencies
D	The transceiver is operating from an external power source

15. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Radio wave propagation
B	Antenna front-to-back ratio
C	Standing wave ratio
D	RF interference

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	The DSP filter is much more effective at VHF frequencies
C	Mixing products are greatly reduced
D	A wide range of filter bandwidths and shapes can be created

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Increase transmitter bass response for more natural sounding SSB signals
B	Decrease high-frequency voice output to prevent out of band operation
C	Prevent distortion of voice signals
D	Increase the intelligibility of transmitted phone signals during poor conditions

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

19. - G5A08

Why is impedance matching important?

Select	Answer
A	To ensure that the resistance and reactance in the circuit are equal
B	So the source can deliver maximum power to the load
C	So the load will draw minimum power from the source
D	To ensure that there is less resistance than reactance in the circuit

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

Select	Answer
A	Approximately 11 milliwatts
B	Approximately 61 milliwatts
C	Approximately 11 watts
D	Approximately 61 watts

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

22. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?

Select	Answer
A	12 volts
B	10.5 volts
C	6 volts
D	8.5 volts

23. - G6B13

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

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

24. - G7A12

Which symbol in Figure G7-1 represents a multiple-winding transformer?

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

25. - G7B03

Which of the following describes the function of a two input AND gate?

Select	Answer
A	Output is low only when both inputs are high
B	Output is high when either or both inputs are low
C	Output is high only when both inputs are high
D	Output is low when either or both inputs are high

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	Detector
C	Discriminator
D	IF amplifier

27. - G8A06

What is one advantage of carrier suppression in a single sideband phone transmission versus full carrier amplitude modulation?

Select	Answer
A	Simpler receiving equipment can be used
B	Greater modulation percentage is obtainable with lower distortion
C	Available transmitter power can be used more effectively
D	Audio fidelity is improved

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	5 kHz
B	416.7 Hz
C	101.75 Hz
D	60 kHz

29. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	On and Off
B	High and Low
C	Dot and Dash
D	Mark and Space

30. - G9A07

What must be done to prevent standing waves on an antenna feed line?

Select	Answer
A	The antenna feed point must be at DC ground potential
B	The feed line must be cut to a length equal to an even number of physical half wavelengths
C	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
D	The feed line must be cut to a length equal to an odd number of electrical quarter wavelengths

31. - G9B03

What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?

Select	Answer
A	It increases
B	It decreases
C	It stays the same
D	It reaches a maximum at an angle of 45 degrees

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

33. - G9D02

Which of the following is an advantage of an NVIS antenna?

Select	Answer
A	Low vertical angle radiation for working stations out to ranges of several thousand kilometers
B	All of these choices are correct
C	High forward gain
D	High vertical angle radiation for working stations within a radius of a few hundred kilometers

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

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable bandwidth limits
B	Electrical safety inside the ham shack
C	RF exposure limits of the human body
D	Acceptable modulation limits

Figure G7-1