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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations are allowed to use the band only during emergencies
C	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band

2. - G1B08

When choosing a transmitting frequency, what should you do to comply with good amateur practice?

Select	Answer
A	All of these choices are correct
B	Monitor the frequency before transmitting
C	Follow generally accepted band plans agreed to by the Amateur Radio community
D	Insure that the frequency and mode selected are within your license class privileges

3. - G1C08

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

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

4. - G1D05

Which of the following must a person have before they can be an administering VE for a Technician Class license examination?

Select	Answer
A	An FCC General Class or higher license and VEC accreditation
B	Receipt of a CSCE for General Class
C	Possession of a properly obtained telegraphy license
D	Notification to the FCC that you want to give an examination

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

6. - G2A06

Which of the following is an advantage when using single sideband as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Ease of tuning on receive and immunity to impulse noise
B	Very high fidelity voice modulation
C	Less subject to interference from atmospheric static crashes
D	Less bandwidth used and greater power efficiency

7. - G2B11

What frequency should be used to send a distress call?

Select	Answer
A	Whichever frequency has the best chance of communicating the distress message
B	Only frequencies authorized for RACES or ARES stations
C	Only frequencies used by police, fire or emergency medical services
D	Only frequencies that are within your operating privileges

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	SK
B	BK
C	AR
D	KN

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

Select	Answer
A	To coordinate repeaters for efficient and orderly spectrum usage
B	To provide emergency and public safety communications
C	To encourage self-regulation and compliance with the rules by radio amateur operators
D	To conduct efficient and orderly amateur licensing examinations

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	Overmodulation
D	Long Path propagation

11. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of the highest frequency that is useful for ionospheric propagation between two points on the Earth
B	Another name for the American sunspot number
C	A measure of solar radiation at 10.7 centimeters wavelength
D	A count of sunspots which is adjusted for solar emissions

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Send a series of dots on the band and listen for echoes from your signal
B	Check the strength of TV signals from Western Europe
C	Check the strength of signals in the MF AM broadcast band
D	Listen for signals from an international beacon in the frequency range you plan to use

13. - G3C05

Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?

Select	Answer
A	The F layer is unstable during daylight hours
B	The D layer absorbs signals at these frequencies during daylight hours
C	The E layer is unstable during daylight hours
D	The F layer absorbs signals at these frequencies during daylight hours

14. - G4A07

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

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

15. - G4B05

Why is high input impedance desirable for a voltmeter?

Select	Answer
A	It improves the resolution of the readings
B	It improves the frequency response
C	It decreases battery consumption in the meter
D	It decreases the loading on circuits being measured

16. - G4C11

Which of the following is a function of a digital signal processor?

Select	Answer
A	To provide adequate grounding
B	To remove noise from received signals
C	To increase antenna gain
D	To increase antenna bandwidth

17. - G4D04

What does an S meter measure?

Select	Answer
A	Received signal strength
B	Impedance
C	Transmitter power output
D	Conductance

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

Select	Answer
A	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
B	Drawing more than 50 watts from this socket could cause the engine to overheat
C	The socket is not wired with an RF-shielded power cable
D	The socket's wiring may be inadequate for the current drawn by the transceiver

19. - G5A04

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

Select	Answer
A	Reactance
B	Conductance
C	Admittance
D	Reluctance

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It equals the average of each branch current
B	It decreases as more parallel branches are added to the circuit
C	It is the sum of the reciprocal of each individual voltage drop
D	It equals the sum of the currents through each branch

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 capacitor in parallel
C	A resistor in parallel
D	A resistor in series

22. - G6A06

Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?

Select	Answer
A	Longer switching times
B	Lower inductance
C	Higher breakdown voltage
D	Lower capacitance

23. - G6B16

Which of the following describes a type N connector?

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

24. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 11
B	Symbol 2
C	Symbol 1
D	Symbol 7

25. - G7B02

Which of the following is an advantage of using the binary system when processing digital signals?

Select	Answer
A	Binary numbers are more compatible with analog circuitry
B	Binary "ones" and "zeros" are easy to represent by an "on" or "off" state
C	The binary number system is most accurate
D	All of these choices are correct

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 that uses crystal filters designed using software
C	A radio that provides computer interface for automatic logging of band and frequency
D	A radio in which most major signal processing functions are performed by software

27. - G8A09

What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?

Select	Answer
A	The RF clipping level
B	Transmit audio or microphone gain
C	Antenna inductance or capacitance
D	Attenuator level

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It improves impedance matching of the antenna
B	It is required by FCC rules
C	It minimizes power consumption in the receiver
D	It results in the best signal to noise ratio

29. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Varicode
C	Viterbi
D	Binary

30. - G9A08

If the SWR on an antenna feed line is 5 to 1, and a matching network at the transmitter end of the feed line is adjusted to 1 to 1 SWR, what is the resulting SWR on the feed line?

Select	Answer
A	5 to 1
B	Between 1 to 1 and 5 to 1 depending on the reflected power at the transmitter
C	Between 1 to 1 and 5 to 1 depending on the characteristic impedance of the line
D	1 to 1

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, the azimuthal pattern is almost omnidirectional
C	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
D	If the antenna is too high, the pattern becomes unpredictable

32. - G9C14

How does the forward gain of a two-element quad antenna compare to the forward gain of a three-element Yagi antenna?

Select	Answer
A	About twice as much
B	About 1.5 times as much
C	About the same
D	About 2/3 as much

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Non-Varying Impedance Smoothing
B	Non-Varying Indicated SWR
C	Nearly Vertical Inductance System
D	Near Vertical Incidence sky-wave

34. - G0A07

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

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

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable modulation limits
B	Electrical safety inside the ham shack
C	Acceptable bandwidth limits
D	RF exposure limits of the human body

Figure G7-1