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. - G1A10

Which of the following frequencies is available to a control operator holding a General Class license?

Select	Answer
A	28.550 MHz
B	28.350 MHz
C	28.020 MHz
D	All of these choices are correct

2. - G1B09

When may an amateur station transmit communications in which the licensee or control operator has a pecuniary (monetary) interest?

Select	Answer
A	Only when there is no other means of communications readily available
B	Never
C	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
D	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

3. - G1C08

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

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

4. - G1D01

Who may receive credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
B	Anyone who held an FCC issued amateur radio license that has been expired for not less than 5 years and not more than 15 years
C	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
D	Any person who can demonstrate that they once held an FCC issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC

5. - G1E05

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

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

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Frequency modulation
B	Single sideband
C	Double sideband
D	Phase modulation

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	3 to 6 kHz
C	1 to 3 kHz
D	150 to 500 Hz

8. - G2C02

What should you do if a CW station sends "QRS"?

Select	Answer
A	Repeat everything twice
B	Increase your power
C	Change frequency
D	Send slower

9. - G2D09

What information is traditionally contained in a station log?

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

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	Winlink
B	ARES
C	RTTY
D	Skywarn

11. - G3A08

Which of the following effects can a geomagnetic storm have on radio propagation?

Select	Answer
A	Degraded high-latitude HF propagation
B	Improved chances of UHF ducting
C	Improved high-latitude HF propagation
D	Improved ground-wave propagation

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

13. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Energy is scattered into the skip zone through several different radio wave paths
B	Ground waves are absorbing much of the signal
C	The ionospheric layer involved is unstable
D	The E-region is not present

14. - G4A13

What is one reason to use the attenuator function that is present on many HF transceivers?

Select	Answer
A	To slow down received CW signals for better copy
B	To reduce the transmitter power when driving a linear amplifier
C	To reduce power consumption when operating from batteries
D	To reduce signal overload due to strong incoming signals

15. - G4B08

Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

Select	Answer
A	A field strength meter
B	An antenna noise bridge
C	A Q meter
D	A multimeter

16. - G4C05

What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Select	Answer
A	Insulated wire has been used for the ground wire
B	The ground wire has high impedance on that frequency
C	Flat braid rather than round wire has been used for the ground wire
D	The ground rod is resonant

17. - G4D03

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

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

18. - G4E02

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

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

19. - G5A11

Which of the following describes one method of impedance matching between two AC circuits?

Select	Answer
A	Reduce the power output of the first circuit
B	Insert a circulator between the two circuits
C	Insert an LC network between the two circuits
D	Increase the power output of the first circuit

20. - G5B12

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

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

21. - G5C06

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

Select	Answer
A	540 volts
B	26.7 volts
C	2370 volts
D	5.9 volts

22. - G6A11

Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?

Select	Answer
A	A varistor
B	A bipolar transistor
C	A tunnel diode
D	A field effect transistor

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	Forward Biased
C	Reverse Biased
D	Beyond cutoff

24. - G7A06

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

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

25. - G7B07

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

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

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 converting the signal from analog to digital and using digital processing
C	By using direct signal phasing
D	By differential spurious phasing

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Phase modulation
C	Frequency modulation
D	Frequency shift keying

28. - G8B05

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

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

29. - G8C02

How many data bits are sent in a single PSK31 character?

Select	Answer
A	The number varies
B	8
C	7
D	5

30. - G9A14

What is the interaction between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR reduces the relative effect of transmission line loss
B	High SWR makes it difficult to measure transmission line loss
C	There is no interaction between transmission line loss and SWR
D	If a transmission line is lossy, high SWR will increase the loss

31. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	On the surface of the Earth or buried a few inches below the ground
B	At the center of the antenna
C	Parallel to the antenna element
D	As high as possible above the ground

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

33. - G9D02

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

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

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 the blood count to reach a dangerously low level
D	It causes radiation poisoning

35. - G0B07

Which of these choices should be observed when climbing a tower using a safety belt or harness?

Select	Answer
A	All of these choices are correct
B	Never lean back and rely on the belt alone to support your weight
C	Confirm that the belt is rated for the weight of the climber and that it is within its allowable service life
D	Ensure that all heavy tools are securely fastened to the belt D-ring