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. - G1A13

What is the appropriate action if, when operating on either the 30-meter or 60-meter bands, a station in the primary service interferes with your contact?

Select	Answer
A	Attempt to contact the station and request that it stop the interference
B	Increase your transmitter's power to overcome the interference
C	Notify the FCCs regional Engineer in Charge of the interference
D	Move to a clear frequency or stop transmitting

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	300 feet
B	200 feet
C	50 feet
D	100 feet

3. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

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

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

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	When messages are not encrypted
B	Under no circumstances
C	When messages are encrypted
D	When under automatic control

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. - G2B08

What is the "DX window" in a voluntary band plan?

Select	Answer
A	A portion of the band that should not be used for contacts between stations within the 48 contiguous United States
B	A portion of the band that has been voluntarily set aside for digital contacts only
C	An FCC rule that allows only digital contacts in that portion of the band
D	An FCC rule that prohibits contacts between stations within the United States and possessions in that portion of the band

8. - G2C01

Which of the following describes full break-in telegraphy (QSK)?

Select	Answer
A	Transmitting stations can receive between code characters and elements
B	An operator must activate a manual send/receive switch before and after every transmission
C	Breaking stations send the Morse code prosign BK
D	Automatic keyers are used to send Morse code instead of hand keys

9. - G2D07

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third party traffic
B	If you are using other than a dipole antenna, you must keep a record of the gain of your antenna
C	You must keep a record of the date, time, frequency, power level and stations worked
D	You must keep a record of the manufacturer of your equipment and the antenna used

10. - G2E07

What segment of the 80-meter band is most commonly used for digital transmissions?

Select	Answer
A	3700 - 3750 kHz
B	3570 - 3600 kHz
C	3775 - 3825 kHz
D	3500 - 3525 kHz

11. - G3A02

What effect does a Sudden Ionospheric Disturbance have on the daytime ionospheric propagation of HF radio waves?

Select	Answer
A	None, because only areas on the night side of the Earth are affected
B	It disrupts signals on lower frequencies more than those on higher frequencies
C	It enhances propagation on all HF frequencies
D	It disrupts communications via satellite more than direct communications

12. - G3B07

What does LUF stand for?

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

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

14. - G4A15

Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?

Select	Answer
A	The VOX circuit does not un-key the transmitter
B	All of these choices are correct
C	The transmitter signal is distorted
D	Frequent connection timeouts

15. - G4B15

What type of transmitter performance does a two-tone test analyze?

Select	Answer
A	Percentage of carrier phase shift
B	Linearity
C	Percentage of frequency modulation
D	Percentage of suppression of carrier and undesired sideband for SSB

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	Fewer digital components are required
C	The DSP filter is much more effective at VHF frequencies
D	Mixing products are greatly reduced

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Increase the intelligibility of transmitted phone signals during poor conditions
B	Prevent distortion of voice signals
C	Increase transmitter bass response for more natural sounding SSB signals
D	Decrease high-frequency voice output to prevent out of band operation

18. - G4E10

What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	The diode serves to regulate the charging voltage to prevent overcharge
B	The diode prevents self-discharge of the battery though the panel during times of low or no illumination
C	The diode greatly increases the efficiency during times of high illumination
D	The diode limits the current flowing from the panel to a safe value

19. - G5A04

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

Select	Answer
A	Admittance
B	Reluctance
C	Conductance
D	Reactance

20. - G5B04

How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	24 watts
B	2.4 watts
C	60 watts
D	6 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 transformer no longer functions as it is a unidirectional device
B	The secondary voltage becomes 4 times the primary voltage
C	Additional resistance must be added in series with the primary to prevent overload
D	Additional resistance must be added in parallel with the secondary to prevent overload

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

23. - G6B14

Which of these connector types is commonly used for audio signals in Amateur Radio stations?

Select	Answer
A	BNC
B	Type N
C	RCA Phono
D	PL-259

24. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A steady DC voltage
B	A sine wave at half the frequency of the AC input
C	A series of DC pulses at the same frequency as the AC input
D	A series of DC pulses at twice the frequency of the AC input

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	The binary number system is most accurate
C	All of these choices are correct
D	Binary "ones" and "zeros" are easy to represent by an "on" or "off" state

26. - G7C07

What is the simplest combination of stages that implement a superheterodyne receiver?

Select	Answer
A	RF amplifier, detector, audio amplifier
B	HF oscillator, prescaler, audio amplifier
C	HF oscillator, mixer, detector
D	RF amplifier, mixer, IF 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 conversion
B	Frequency convolution
C	Frequency transformation
D	Frequency modulation

28. - G8B03

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

Select	Answer
A	Synthesizing
B	Phase inverting
C	Cancellation
D	Heterodyning

29. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using SELCAL and LISTEN
B	A 7-bit code with start, stop and parity bits
C	A 5-bit code with additional start and stop bits
D	A code using error detection and correction

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

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	16 feet
C	8 feet
D	11 feet

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

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To prevent out of band operation
B	To notch spurious frequencies
C	To provide balanced feed point impedance
D	To permit multiband operation

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	Its frequency
B	Its power density
C	All of these choices are correct
D	Its duty cycle

35. - G0B13

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

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