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	Region 3
B	Region 2
C	Region 1
D	All three regions

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 apparatus normally used in an amateur station and such activity is not done on a regular basis
B	Never
C	Only when there is no other means of communications readily available
D	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

3. - G1C02

What is the maximum transmitting power an amateur station may use on the 12-meter band?

Select	Answer
A	1500 watts PEP output
B	An effective radiated power equivalent to 100 watts from a half-wave dipole
C	50 watts PEP output
D	200 watts PEP output

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	General only
B	Extra, General and Technician
C	General and Technician
D	Technician only

5. - G1E04

Which of the following conditions require a licensed Amateur Radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	All of these choices are correct
B	When using a band where the Amateur Service is secondary
C	When a station is transmitting spread spectrum emissions
D	When operating within one mile of an FCC Monitoring Station

6. - G2A03

Which of the following is most commonly used for SSB voice communications in the VHF and UHF bands?

Select	Answer
A	Vestigial sideband
B	Upper sideband
C	Double sideband
D	Lower sideband

7. - G2B04

When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	5 to 50 Hz
B	1 to 3 kHz
C	150 to 500 Hz
D	3 to 6 kHz

8. - G2C05

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

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

9. - G2D08

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

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

10. - G2E07

What segment of the 80-meter band is most commonly used for digital transmissions?

Select	Answer
A	3700 - 3750 kHz
B	3500 - 3525 kHz
C	3775 - 3825 kHz
D	3570 - 3600 kHz

11. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from solar flares to affect radio propagation on the Earth?

Select	Answer
A	8 minutes
B	20 to 40 hours
C	1 to 2 hours
D	28 days

12. - G3B03

Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?

Select	Answer
A	Select a frequency just below the critical frequency
B	Select a frequency just below the MUF
C	Select a frequency just above the critical frequency
D	Select a frequency just above the LUF

13. - G3C08

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

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

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Excessive drive power
B	Shorting the input signal to ground
C	Insufficient drive power
D	Low input SWR

15. - G4B09

Which of the following can be determined with a field strength meter?

Select	Answer
A	The radiation pattern of an antenna
B	The radiation resistance of an antenna
C	The presence and amount of amplitude distortion of a transmitter
D	The presence and amount of phase distortion of a transmitter

16. - G4C07

What is one good way to avoid unwanted effects of stray RF energy in an amateur station?

Select	Answer
A	Use a ground loop for best conductivity
B	Connect all equipment grounds together
C	Install an RF filter in series with the ground wire
D	Install a few ferrite beads on the ground wire where it connects to your station

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	14.347 to 14.350 MHz
B	14.347 to 14.647 MHz
C	14.344 to 14.347 MHz
D	14.3455 to 14.3485 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. - G5A05

How does an inductor react to AC?

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

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	20.5 percent
B	25.9 percent
C	10.9 percent
D	12.2 percent

21. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

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

22. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To reduce grid-to-plate capacitance
B	To increase the control grid resistance
C	To decrease plate resistance
D	To increase efficiency

23. - G6B18

What is a type SMA connector?

Select	Answer
A	A type of push-on connector intended for high voltage applications
B	A large bayonet connector usable at power levels in excess of 1 KW
C	A connector designed for serial multiple access signals
D	A small threaded connector suitable for signals up to several GHz

24. - G7A05

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

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

25. - G7B07

What are the basic components of virtually all sine wave oscillators?

Select	Answer
A	A circulator and a filter operating in a feed-forward loop
B	A filter and an amplifier operating in a feedback loop
C	An amplifier and a divider
D	A frequency multiplier and a mixer

26. - G7C10

How is Digital Signal Processor filtering accomplished?

Select	Answer
A	By converting the signal from digital to analog and taking the difference of mixing products
B	By differential spurious phasing
C	By using direct signal phasing
D	By converting the signal from analog to digital and using digital processing

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 modulation
B	Frequency conversion
C	Frequency convolution
D	Frequency transformation

28. - G8B05

What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?

Select	Answer
A	500 Hz
B	1800 Hz
C	31.5 Hz
D	2300 Hz

29. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	Clover
B	RTTY
C	JT9 and JT65
D	FSK441 and Hellschreiber

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	80 and 100 ohms
B	500 and 750 ohms
C	25 and 30 ohms
D	50 and 75 ohms

31. - G9B05

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

Select	Answer
A	Antenna height has no effect on the pattern
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	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	It does not require that the elements be insulated from the boom
B	It does not require any inductors or capacitors
C	All of these choices are correct
D	It is useful for matching multiband antennas

33. - G9D09

Which of the following is an application for a Beverage antenna?

Select	Answer
A	Portable direction finding at lower HF frequencies
B	Portable direction finding at higher HF frequencies
C	Directional transmitting for low HF bands
D	Directional receiving for low HF bands

34. - G0A01

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

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

35. - G0B09

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

Select	Answer
A	The resistance of solder is too high
B	Solder flux will prevent a low conductivity connection
C	Solder has too high a dielectric constant to provide adequate lightning protection
D	A soldered joint will likely be destroyed by the heat of a lightning strike