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. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	30 meters
C	12 meters
D	20 meters

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	They are not permitted
B	They may be used if they do not obscure the meaning of a message
C	Only "10 codes" are permitted
D	Only "Q" signals are permitted

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	19.6 kilobaud
B	1200 baud
C	300 baud
D	56 kilobaud

4. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	12 years
B	There is no age limit
C	18 years
D	21 years

5. - G1E06

Which of the following applies in the event of interference between a coordinated repeater and an uncoordinated repeater?

Select	Answer
A	The frequency coordinator bears primary responsibility to resolve the interference
B	The licensee of the coordinated repeater has primary responsibility to resolve the interference
C	The licensee of the uncoordinated repeater has primary responsibility to resolve the interference
D	Both repeater licensees share equal responsibility to resolve the interference

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

7. - G2B11

What frequency should be used to send a distress call?

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

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	100 percent copy
B	Report was read from an S meter rather than estimated
C	Key clicks
D	Chirpy or unstable signal

9. - G2D11

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

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

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	LSB
B	CW
C	USB
D	DSB

11. - G3A01

What is the significance of the sunspot number with regard to HF propagation?

Select	Answer
A	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
B	A zero sunspot number indicate radio propagation is not possible on any band
C	All of these choices are correct.
D	Lower sunspot numbers generally indicate greater probability of sporadic E propagation

12. - G3B08

What does MUF stand for?

Select	Answer
A	The Minimum Usable Frequency for communications between two points
B	The Maximum Usable Frequency for communications between two points
C	The Minimum Usable Frequency during a 24 hour period
D	The Maximum Usable Frequency during a 24 hour period

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
C	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
D	The long path azimuth of a distant station

14. - G4A13

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

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

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. - G4C11

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

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

17. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.178 to 7.181 MHz
B	7.175 to 7.178 MHz
C	7.178 to 7.184 MHz
D	7.1765 to 7.1795 MHz

18. - G4E11

Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?

Select	Answer
A	All of these choices are correct
B	The conversion efficiency from mechanical energy to electrical energy is less than 2 percent
C	A large energy storage system is needed to supply power when the wind is not blowing
D	The voltage and current ratings of such systems are not compatible with amateur equipment

19. - G5A10

What unit is used to measure impedance?

Select	Answer
A	Watt
B	Ohm
C	Volt
D	Ampere

20. - G5B14

What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?

Select	Answer
A	625 watts
B	5000 watts
C	8.75 watts
D	2500 watts

21. - G5C02

What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?

Select	Answer
A	The secondary voltage becomes 4 times the primary voltage
B	The transformer no longer functions as it is a unidirectional device
C	Additional resistance must be added in parallel with the secondary to prevent overload
D	Additional resistance must be added in series with the primary to prevent overload

22. - G6A09

Which of the following describes the construction of a MOSFET?

Select	Answer
A	The gate is formed by a back-biased junction
B	The source is formed by depositing metal on silicon
C	The source is separated from the drain by a thin insulating layer
D	The gate is separated from the channel with a thin insulating layer

23. - G6B18

What is a type SMA connector?

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

24. - G7A13

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

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

25. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	6
B	3
C	16
D	8

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Phase inverter
B	Product detector
C	Mixer
D	Discriminator

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 transformation
B	Frequency convolution
C	Frequency conversion
D	Frequency modulation

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Cancellation
B	Phase inverting
C	Heterodyning
D	Synthesizing

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 transmitting redundant information with the data
C	By using the varicode character set
D	By controlling transmitter output power for optimum signal strength

30. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?

Select	Answer
A	The radius of the conductors and the frequency of the signal
B	The distance between the centers of the conductors and the length of the line
C	The frequency of the signal and the length of the line
D	The distance between the centers of the conductors and the radius of the conductors

31. - G9B12

What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?

Select	Answer
A	21 feet
B	8 feet
C	11 feet
D	16 feet

32. - G9C06

What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?

Select	Answer
A	The driven element must be fed with a balun transformer
B	There must be an open circuit in the driven element at the point opposite the feed point
C	The reflector element must be approximately 5 percent shorter than the driven element
D	The reflector element must be approximately 5 percent longer than the driven element

33. - G9D01

What does the term NVIS mean as related to antennas?

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

34. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	All of these choices are correct
B	By calculation based on FCC OET Bulletin 65
C	By calculation based on computer modeling
D	By measurement of field strength using calibrated equipment

35. - G0B08

What should be done by any person preparing to climb a tower that supports electrically powered devices?

Select	Answer
A	Make sure all circuits that supply power to the tower are locked out and tagged
B	Unground the base of the tower
C	Notify the electric company that a person will be working on the tower
D	All of these choices are correct

Figure G7-1