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. - G1A11

When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

Select	Answer
A	The upper frequency end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
B	The upper frequency end
C	The lower frequency end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz
D	The lower frequency end

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	During a declared communications emergency
B	Only with Special Temporary Authorization from the FCC
C	To control a space station
D	Only when the information is of a routine, personal nature

3. - G1C11

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

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

4. - G1D08

Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must be a resident of the U.S. for a minimum of 5 years
B	The person must hold an FCC granted Amateur Radio license of General Class or above
C	The person's home citizenship must be in ITU region 2
D	None of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Under no circumstances
B	Only if the 10-meter repeater control operator holds at least a General Class license
C	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
D	Only during an FCC declared general state of communications emergency

6. - G2A11

What does the expression "CQ DX" usually indicate?

Select	Answer
A	A general call for any station
B	A distress call
C	The caller is looking for any station outside their own country
D	The caller is listening for a station in Germany

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	Listen for 2 minutes before calling CQ
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	I am troubled by static
B	Zero beat my signal
C	Send more slowly
D	Stop sending

9. - G2D11

Which HF antenna would be the best to use for minimizing interference?

Select	Answer
A	A directional antenna
B	A quarter-wave vertical antenna
C	An isotropic antenna
D	An omnidirectional antenna

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Insufficient modulation
B	Backscatter propagation
C	Long Path propagation
D	Overmodulation

11. - G3A13

What does the A-index indicate?

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

12. - G3B12

What factor or factors affect the MUF?

Select	Answer
A	All of these choices are correct
B	Time of day and season
C	Solar radiation and ionospheric disturbances
D	Path distance and location

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Only a small part of the signal energy is scattered into the skip zone
B	Propagations is through ducts in F region which absorb most of the energy
C	Propagation is through ground waves which absorb most of the signal energy
D	Signals are scattered from the magnetosphere which is not a good reflector

14. - G4A09

Why is a time delay sometimes included in a transmitter keying circuit?

Select	Answer
A	To allow time for a warning signal to be sent to other stations
B	To allow time for transmit-receive changeover operations to complete properly before RF output is allowed
C	To prevent stations from interfering with one another
D	To allow the transmitter power regulators to charge properly

15. - G4B06

What is an advantage of a digital voltmeter as compared to an analog voltmeter?

Select	Answer
A	Better precision for most uses
B	Faster response
C	Better for RF measurements
D	Better for measuring computer circuits

16. - G4C09

How can a ground loop be avoided?

Select	Answer
A	Avoid using lock washers and star washers when making ground connections
B	Connect all ground conductors to a single point
C	Connect the AC neutral conductor to the ground wire
D	Connect all ground conductors in series

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.3455 to 14.3485 MHz
B	14.347 to 14.647 MHz
C	14.347 to 14.350 MHz
D	14.344 to 14.347 MHz

18. - G4E02

What is the purpose of a corona ball on a HF mobile antenna?

Select	Answer
A	To increase the "Q" of the antenna
B	To reduce the chance of damage if the antenna should strike an object
C	To narrow the operating bandwidth of the antenna
D	To reduce high voltage discharge from the tip of the antenna

19. - G5A06

How does a capacitor react to AC?

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

20. - G5B06

What is the output PEP from a transmitter if an oscilloscope measures 200 volts peak-to-peak across a 50 ohm dummy load connected to the transmitter output?

Select	Answer
A	1.4 watts
B	400 watts
C	100 watts
D	353.5 watts

21. - G5C03

Which of the following components should be added to an existing resistor to increase the resistance?

Select	Answer
A	A capacitor in series
B	A resistor in series
C	A capacitor in parallel
D	A resistor in parallel

22. - G6A18

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	Large values of inductance may be obtained
B	All of these choices are correct
C	Most of the magnetic field is contained in the core
D	The magnetic properties of the core may be optimized for a specific range of frequencies

23. - G6B14

Which of these connector types is commonly used for audio signals in Amateur Radio stations?

Select	Answer
A	Type N
B	BNC
C	PL-259
D	RCA Phono

24. - G7A13

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

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

25. - G7B13

What is the reason for neutralizing the final amplifier stage of a transmitter?

Select	Answer
A	To limit the modulation index
B	To eliminate self-oscillations
C	To keep the carrier on frequency
D	To cut off the final amplifier during standby periods

26. - G7C11

What is meant by the term "software defined radio" (SDR)?

Select	Answer
A	A computer model that can simulate performance of a radio to aid in the design process
B	A radio in which most major signal processing functions are performed by software
C	A radio that uses crystal filters designed using software
D	A radio that provides computer interface for automatic logging of band and frequency

27. - G8A02

What is the name of the process that changes the phase angle of an RF wave to convey information?

Select	Answer
A	Radian inversion
B	Angle convolution
C	Phase convolution
D	Phase modulation

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	101.75 Hz
B	416.7 Hz
C	60 kHz
D	5 kHz

29. - G8C10

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

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

30. - G9A04

What might cause reflected power at the point where a feed line connects to an antenna?

Select	Answer
A	Feeding the antenna with unbalanced feed line
B	Operating an antenna at its resonant frequency
C	Using more transmitter power than the antenna can handle
D	A difference between feed line impedance and antenna feed point impedance

31. - G9B05

How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
B	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
C	If the antenna is too high, the pattern becomes unpredictable
D	Antenna height has no effect on the pattern

32. - G9C05

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

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

33. - G9D05

What is an advantage of vertical stacking of horizontally polarized Yagi antennas?

Select	Answer
A	It allows simultaneous vertical and horizontal polarization
B	It narrows the main lobe in azimuth
C	It narrows the main lobe in elevation
D	It allows quick selection of vertical or horizontal polarization

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should be installed such that it is protected against unauthorized access
B	It should limited to 10 feet in height
C	It should not be installed higher than you can reach
D	It should not be installed in a wet area

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Lead can contaminate food if hands are not washed carefully after handling the solder
B	High voltages can cause lead-tin solder to disintegrate suddenly
C	Tin in the solder can "cold flow" causing shorts in the circuit
D	RF energy can convert the lead into a poisonous gas

Figure G7-1