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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	1875 kHz
B	3900 kHz
C	4005 kHz
D	3750 kHz

2. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	20 watts PEP output
B	10 watts PEP output
C	100 watts PEP output
D	200 watts PEP output

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	1200 baud
C	300 baud
D	19.6 kilobaud

4. - G1D06

When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its website ?

Select	Answer
A	Whenever you operate on any amateur frequency
B	A special identifier is not required as long as your General Class license application has been filed with the FCC
C	Whenever you operate using General Class frequency privileges
D	Whenever you operate using Technician frequency privileges

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Under no circumstances
B	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
C	Only during an FCC declared general state of communications emergency
D	Only if the 10-meter repeater control operator holds at least a General Class license

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

7. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Acknowledge the station in distress and determine what assistance may be needed
B	Immediately cease all transmissions
C	Continue your communication because you were on the frequency first
D	Change to a different frequency

8. - G2C09

What does the Q signal "QSL" mean?

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

9. - G2D08

What is a reason why many amateurs keep a station log?

Select	Answer
A	The ITU requires a log of all international contacts
B	The log provides evidence of operation needed to renew a license without retest
C	The ITU requires a log of all international third party traffic
D	To help with a reply if the FCC requests information

10. - G2E03

What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?

Select	Answer
A	Long pauses in message transmission
B	Frequent retries or timeouts
C	Failure to establish a connection between stations
D	All of these choices are correct

11. - G3A14

How are radio communications usually affected by the charged particles that reach the Earth from solar coronal holes?

Select	Answer
A	HF communications are disturbed
B	VHF/UHF ducting is disturbed
C	VHF/UHF ducting is improved
D	HF communications are improved

12. - G3B05

What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

Select	Answer
A	They are bent back to the Earth
B	They pass through the ionosphere
C	They are amplified by interaction with the ionosphere
D	They are bent and trapped in the ionosphere to circle the Earth

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	The ionospheric layer involved is unstable
C	Ground waves are absorbing much of the signal
D	The E-region is not present

14. - G4A03

What is normally meant by operating a transceiver in "split" mode?

Select	Answer
A	The transceiver is set to different transmit and receive frequencies
B	The transceiver is operating from an external power source
C	The transmitter is emitting an SSB signal, as opposed to DSB operation
D	The radio is operating at half power

15. - G4B13

What is a use for an antenna analyzer other than measuring the SWR of an antenna system?

Select	Answer
A	Determining the impedance of an unknown or unmarked coaxial cable
B	Measuring the turns ratio of a power transformer
C	Measuring the front to back ratio of an antenna
D	Determining the gain of a directional antenna

16. - G4C12

Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?

Select	Answer
A	A wide range of filter bandwidths and shapes can be created
B	The DSP filter is much more effective at VHF frequencies
C	Mixing products are greatly reduced
D	Fewer digital components are required

17. - G4D11

How close to the upper edge of the 20-meter General Class band should your displayed carrier frequency be when using 3 kHz wide USB?

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

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 battery using heavy gauge wire
C	To the alternator or generator using resistor wire
D	To the alternator or generator using heavy gauge wire

19. - G5A03

Which of the following causes opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Reluctance
C	Reactance
D	Admittance

20. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	34 volts
B	24 volts
C	12 volts
D	8.5 volts

21. - G5C04

What is the total resistance of three 100 ohm resistors in parallel?

Select	Answer
A	0.33 ohms
B	33.3 ohms
C	0.30 ohms
D	300 ohms

22. - G6A07

What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?

Select	Answer
A	Its enhancement and depletion modes
B	Its peak and valley current points
C	Its saturation and cutoff regions
D	Its active region (between the cutoff and saturation regions)

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	Faster response time
B	Longer life
C	Lower power consumption
D	All of these choices are correct

24. - G7A03

What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

Select	Answer
A	Double the normal peak output voltage of the power supply
B	Half the normal output voltage of the power supply
C	Equal to the normal peak output voltage of the power supply
D	One-quarter the normal output voltage of the power supply

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class AB
B	Class C
C	Class A
D	Class B

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	Discriminator
B	Phase inverter
C	Product detector
D	Mixer

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Excessive bandwidth
B	Insufficient audio
C	Frequency drift
D	Insufficient bandwidth

28. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Multiplier
B	Pre-emphasis network
C	Mixer
D	Reactance modulator

29. - G8C02

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

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

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	500 and 750 ohms
B	80 and 100 ohms
C	25 and 30 ohms
D	50 and 75 ohms

31. - G9B05

How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
B	If the antenna is too high, the pattern becomes unpredictable
C	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
D	Antenna height has no effect on the pattern

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	It is useful for matching multiband antennas
B	It does not require that the elements be insulated from the boom
C	All of these choices are correct
D	It does not require any inductors or capacitors

33. - G9D05

What is an advantage of vertical stacking of horizontally polarized Yagi antennas?

Select	Answer
A	It allows simultaneous vertical and horizontal polarization
B	It narrows the main lobe in azimuth
C	It narrows the main lobe in elevation
D	It allows quick selection of vertical or horizontal polarization

34. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Take precautions to ensure that the antenna cannot be pointed in their direction
B	Post a warning sign that is clearly visible to the neighbor
C	Change to a non-polarized antenna with higher gain
D	Use an antenna with a higher front-to-back ratio

35. - G0B13

What must you do when powering your house from an emergency generator?

Select	Answer
A	Insure that all lightning grounds are disconnected
B	All of these choices are correct
C	Insure that the generator is not grounded
D	Disconnect the incoming utility power feed