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. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	30 meters
B	12 meters
C	160 meters
D	17 meters

2. - G1B11

How does the FCC require an amateur station to be operated in all respects not specifically covered by the Part 97 rules?

Select	Answer
A	All of these choices are correct
B	In conformance with good engineering and good amateur practice
C	In conformance with Amateur Radio custom
D	In conformance with the rules of the IARU

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	56 kilobaud
B	300 baud
C	19.6 kilobaud
D	1200 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 except 30-meters and 60-meters
C	Only on the Technician band segments until your license arrives in the mail
D	On any General or Technician Class band segment

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Automatically controlled digital station
B	Robotically controlled station
C	Locally controlled station
D	Fail-safe digital station

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

8. - G2C10

What does the Q signal "QRN" mean?

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

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	All of these choices are correct
B	Call sign of station contacted and the signal report given
C	Date and time of contact
D	Band and/or frequency of the contact

10. - G2E03

What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?

Select	Answer
A	All of these choices are correct
B	Long pauses in message transmission
C	Frequent retries or timeouts
D	Failure to establish a connection between stations

11. - G3A13

What does the A-index indicate?

Select	Answer
A	The relative position of sunspots on the surface of the Sun
B	The solar radio flux at Boulder, Colorado
C	The amount of polarization of the Sun's electric field
D	The long term stability of the Earth's geomagnetic field

12. - G3B06

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

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

13. - G3C09

What type of radio wave propagation allows a signal to be detected at a distance too far for ground wave propagation but too near for normal sky-wave propagation?

Select	Answer
A	Short-path skip
B	Scatter
C	Faraday rotation
D	Sporadic-E skip

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Q Multiplier
B	Balanced modulator
C	SWR Bridge
D	Antenna coupler or antenna tuner

15. - G4B12

What problem can occur when making measurements on an antenna system with an antenna analyzer?

Select	Answer
A	Permanent damage to the analyzer may occur if it is operated into a high SWR
B	Connecting the analyzer to an antenna can cause it to absorb harmonics
C	The analyzer can be damaged if measurements outside the ham bands are attempted
D	Strong signals from nearby transmitters can affect the accuracy of measurements

16. - G4C10

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

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

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 20 times less powerful
B	It is 20 times more powerful
C	It is 10 times less powerful
D	It is 100 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. - G5A10

What unit is used to measure impedance?

Select	Answer
A	Ohm
B	Watt
C	Ampere
D	Volt

20. - G5B03

How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load?

Select	Answer
A	3200 watts
B	0.5 watts
C	400 watts
D	200 watts

21. - G5C15

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Select	Answer
A	80 ohms
B	0.17 ohms
C	5.9 ohms
D	10000 ohms

22. - G6A13

Why is the polarity of applied voltages important for polarized capacitors?

Select	Answer
A	The capacitor could overheat and explode
B	Incorrect polarity can cause the capacitor to short-circuit
C	All of these choices are correct
D	Reverse voltages can destroy the dielectric layer of an electrolytic capacitor

23. - G6B15

What is the main reason to use keyed connectors instead of non-keyed types?

Select	Answer
A	Reduced chance of incorrect mating
B	Prevention of use by unauthorized persons
C	Higher current carrying capacity
D	All of these choices are correct

24. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A series of DC pulses at the same frequency as the AC input
B	A steady DC voltage
C	A series of DC pulses at twice the frequency of the AC input
D	A sine wave at half the frequency of the AC input

25. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	8
B	6
C	3
D	16

26. - G7C09

Which of the following is needed for a Digital Signal Processor IF filter?

Select	Answer
A	A digital to analog converter
B	An analog to digital converter
C	All of the these choices are correct
D	A digital processor chip

27. - G8A06

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

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

28. - G8B06

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

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

29. - G8C10

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

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

30. - G9A15

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Transmission line loss does not affect the SWR measurement
B	The higher the transmission line loss, the more the SWR will read artificially low
C	The higher the transmission line loss, the more the SWR will read artificially high
D	The higher the transmission line loss, the more accurate the SWR measurement will be

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

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

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They present low impedance on all design frequencies
B	They have poor harmonic rejection
C	They must be used with an antenna tuner
D	They must be fed with open wire line

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	All of these choices are correct
B	Its power density
C	Its duty cycle
D	Its frequency

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