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. - G1A08

Which of the following frequencies is within the General Class portion of the 80-meter band?

Select	Answer
A	1855 kHz
B	3560 kHz
C	2560 kHz
D	3650 kHz

2. - G1B04

Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?

Select	Answer
A	The communications must directly relate to the immediate safety of human life or protection of property and there must be no other means of communication reasonably available before or at the time of the event
B	All of these choices are correct
C	The FCC must have declared a state of emergency
D	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies

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	19.6 kilobaud
C	300 baud
D	1200 baud

4. - G1D02

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

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

6. - G2A07

Which of the following statements is true of the single sideband voice mode?

Select	Answer
A	SSB is the only voice mode that is authorized on the 160-meter, 75-meter and 40-meter amateur bands
B	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
C	Only one sideband and the carrier are transmitted; the other sideband is suppressed
D	Only one sideband is transmitted; the other sideband and carrier are suppressed

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

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Closing station now
B	Listening for novice stations
C	Listening only for a specific station or stations
D	Operating full break-in

9. - G2D11

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

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

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	Skywarn
B	RTTY
C	Winlink
D	ARES

11. - G3A07

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

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

12. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency during a 24 hour period
B	The Longest Universal Function for communications between two points
C	The Longest Universal Function during a 24 hour period
D	The Lowest Usable Frequency for communications between two points

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	They have high intelligibility
B	They have a wavering sound
C	They have very large swings in signal strength
D	All of these choices are correct

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 prevent stations from interfering with one another
C	To allow the transmitter power regulators to charge properly
D	To allow time for transmit-receive changeover operations to complete properly before RF output is allowed

15. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	An oscilloscope uses less power
B	Input impedance is much lower
C	Complex impedances can be easily measured
D	Complex waveforms can be measured

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Reverse-biased diode
B	Bypass inductor
C	Bypass capacitor
D	Forward-biased diode

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz below the edge of the segment
B	At least 3 kHz above the edge of the segment
C	Your displayed carrier frequency may be set at the edge of the segment
D	At least 1 kHz above the edge of the segment

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	The wire gauge of the DC power line to the transceiver
B	"Picket Fencing" signal variation
C	FCC rules limiting mobile output power on the 75-meter band
D	The antenna system

19. - G5A04

Which of the following causes opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reactance
B	Reluctance
C	Conductance
D	Admittance

20. - G5B11

What is the ratio of peak envelope power to average power for an unmodulated carrier?

Select	Answer
A	0.707
B	1.414
C	2.00
D	1.00

21. - G5C03

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

Select	Answer
A	A capacitor in parallel
B	A resistor in parallel
C	A resistor in series
D	A capacitor 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 efficiency
C	To decrease plate resistance
D	To increase the control grid resistance

23. - G6B16

Which of the following describes a type N connector?

Select	Answer
A	An audio connector used in surround-sound installations
B	A moisture-resistant RF connector useful to 10 GHz
C	A threaded connector used for hydraulic systems
D	A small bayonet connector used for data circuits

24. - G7A12

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

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

25. - G7B06

What is a shift register?

Select	Answer
A	An analog mixer
B	A digital mixer
C	An array of operational amplifiers used for tri-state arithmetic operations
D	A clocked array of circuits that passes data in steps along the array

26. - G7C11

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

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

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	Signal distortion caused by insufficient collector current
B	The transmitter's carrier is properly suppressed
C	The transmitter's automatic level control (ALC) is properly adjusted
D	Signal distortion caused by excessive drive

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is always half the symbol rate
B	Symbol rate and bandwidth are not related
C	Higher symbol rates require wider bandwidth
D	Lower symbol rates require wider bandwidth

29. - G8C02

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

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

30. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 100 feet
B	Ohms per 1000 feet
C	Decibels per 100 feet
D	Decibels per 1000 feet

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	84 feet
B	131 feet
C	263 feet
D	42 feet

32. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	1/4 wavelength
B	1/2 wavelength
C	3/4 wavelength
D	1 wavelength

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	Length and spacing of the elements increase logarithmically from one end of the boom to the other
B	Gain varies logarithmically as a function of frequency
C	Impedance varies periodically as a function of frequency
D	SWR varies periodically as a function of boom length

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
B	A higher transmitter duty cycle permits greater short-term exposure levels
C	High duty cycle transmitters are exempt from RF exposure requirements
D	A lower transmitter duty cycle permits greater short-term exposure levels

35. - G0B11

Which of the following is good practice for lightning protection grounds?

Select	Answer
A	Lightning grounds must be connected to all ungrounded wiring
B	Bends in ground wires must be made as close as possible to a right angle
C	They must be bonded to all buried water and gas lines
D	They must be bonded together with all other grounds

Figure G7-1