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

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	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
C	Only when there is no other means of communications readily available
D	Never

3. - G1C06

Which of the following is a limitation on transmitter power on the 1.8 MHz band?

Select	Answer
A	1000 watts PEP output
B	200 watts PEP output
C	1500 watts PEP output
D	1200 watts PEP output

4. - G1D10

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

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

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

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	Lower sideband
C	Double sideband
D	Upper sideband

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	Increase power to overcome interference
B	As a common courtesy, move your contact to another frequency
C	Report the interference to your local Amateur Auxiliary Coordinator
D	Tell the interfering stations to change frequency

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	We have worked before
B	Send slower
C	I acknowledge receipt
D	We have already confirmed by card

9. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the angle at which an amateur satellite crosses the equator
B	A map that shows true bearings and distances from a particular location
C	A map that shows accurate land masses
D	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit

10. - G2E12

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is vertical, time is intensity
B	Frequency is vertical, signal strength is intensity, time is horizontal
C	Frequency is horizontal, signal strength is intensity, time is vertical
D	Frequency is vertical, signal strength is horizontal, time is intensity

11. - G3A04

Which of the following are least reliable for long distance communications during periods of low solar activity?

Select	Answer
A	15 meters, 12 meters and 10 meters
B	80 meters and 160 meters
C	60 meters and 40 meters
D	30 meters and 20 meters

12. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	No HF radio frequency will support ordinary sky-wave communications over the path
B	Propagation over the path on all HF frequencies is enhanced
C	Double hop propagation along the path is more common
D	HF communications over the path are enhanced

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

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Q Multiplier
B	Balanced modulator
C	Antenna coupler or antenna tuner
D	SWR Bridge

15. - G4B12

What problem can occur when making measurements on an antenna system with an antenna analyzer?

Select	Answer
A	Strong signals from nearby transmitters can affect the accuracy of measurements
B	The analyzer can be damaged if measurements outside the ham bands are attempted
C	Permanent damage to the analyzer may occur if it is operated into a high SWR
D	Connecting the analyzer to an antenna can cause it to absorb harmonics

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

18. - G4E03

Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?

Select	Answer
A	To the battery using resistor wire
B	To the alternator or generator using resistor wire
C	To the alternator or generator using heavy gauge wire
D	To the battery using heavy gauge wire

19. - G5A13

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A Pi-network
B	A length of transmission line
C	All of these choices are correct
D	A transformer

20. - G5B13

What is the output PEP of an unmodulated carrier if an average reading wattmeter connected to the transmitter output indicates 1060 watts?

Select	Answer
A	1060 watts
B	530 watts
C	1500 watts
D	2120 watts

21. - G5C15

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Select	Answer
A	5.9 ohms
B	0.17 ohms
C	10000 ohms
D	80 ohms

22. - G6A05

What is the approximate junction threshold voltage of a conventional silicon diode?

Select	Answer
A	0.7 volts
B	1.0 volts
C	0.3 volts
D	0.1 volt

23. - G6B04

What is meant by the term ROM?

Select	Answer
A	Read Only Memory
B	Random Operational Memory
C	Resistant to Overload Memory
D	Resistor Operated Memory

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Transformers and transducers
B	Diodes
C	Quartz crystals
D	Capacitors and inductors

25. - G7B07

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

Select	Answer
A	A frequency multiplier and a mixer
B	An amplifier and a divider
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 differential spurious phasing
C	By using direct signal phasing
D	By converting the signal from analog to digital and using digital processing

27. - G8A05

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

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

28. - G8B09

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

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

29. - G8C03

What part of a data packet contains the routing and handling information?

Select	Answer
A	Preamble
B	Directory
C	Header
D	Footer

30. - G9A01

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

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

31. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	24 feet
B	16 feet
C	8 feet
D	32 feet

32. - G9C18

What happens when the feed point of a quad antenna of any shape is moved from the midpoint of the top or bottom to the midpoint of either side?

Select	Answer
A	The polarization of the radiated signal changes from horizontal to vertical
B	The radiated signal becomes circularly polarized
C	There is no change in polarization
D	The polarization of the radiated signal changes from vertical to horizontal

33. - G9D07

Which of the following describes a log periodic antenna?

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

34. - G0A11

What precaution should you take if you install an indoor transmitting antenna?

Select	Answer
A	Make sure the antenna is properly shielded
B	Locate the antenna close to your operating position to minimize feed line radiation
C	Position the antenna along the edge of a wall to reduce parasitic radiation
D	Make sure that MPE limits are not exceeded in occupied areas

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Lead can contaminate food if hands are not washed carefully after handling the solder
B	RF energy can convert the lead into a poisonous gas
C	Tin in the solder can "cold flow" causing shorts in the circuit
D	High voltages can cause lead-tin solder to disintegrate suddenly