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	3750 kHz
B	3900 kHz
C	4005 kHz
D	1875 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	Only when the information is of a routine, personal nature
B	During a declared communications emergency
C	Only with Special Temporary Authorization from the FCC
D	To control a space station

3. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	19.6 kilobaud
B	56 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. - G1E06

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

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

6. - G2A04

Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?

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

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response
B	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
C	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
D	Listen for 2 minutes before calling CQ

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Operating full break-in
C	Closing station now
D	Listening for novice stations

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

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

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Respond when the station broadcasts its SSID
B	Send an email to the system control operator
C	Transmit a connect message on the station's published frequency
D	Send QRL in Morse code

11. - G3A16

What is a possible benefit to radio communications resulting from periods of high geomagnetic activity?

Select	Answer
A	Reduced long delayed echoes
B	Improved HF long path propagation
C	Higher signal strength for HF signals passing through the polar regions
D	Auroras that can reflect VHF signals

12. - G3B10

What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the E region?

Select	Answer
A	2,500 miles
B	1,200 miles
C	180 miles
D	12,000 miles

13. - G3C11

Which of the following antenna types will be most effective for skip communications on 40-meters during the day?

Select	Answer
A	A vertical antenna
B	A left-hand circularly polarized antenna
C	A horizontal dipole placed between 1/8 and 1/4 wavelength above the ground
D	A right-hand circularly polarized antenna

14. - G4A07

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

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

15. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	An external RF oscillator
B	The attenuated RF output of the transmitter
C	The transmitter balanced mixer output
D	The local oscillator of the transmitter

16. - G4C10

What could be a symptom of a ground loop somewhere in your station?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	You receive reports of "hum" on your station's transmitted signal
C	The SWR reading for one or more antennas is suddenly very high
D	You receive reports of harmonic interference from your station

17. - G4D06

Where is an S meter found?

Select	Answer
A	In an SWR bridge
B	In a receiver
C	In a conductance bridge
D	In a transmitter

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

19. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of alternating current caused by capacitance or inductance
B	A large spark produced at switch contacts when an inductor is de-energized
C	A property of ideal resistors in AC circuits
D	Opposition to the flow of direct current caused by resistance

20. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The reciprocal of the RMS value
B	The peak value
C	The RMS value
D	The peak-to-peak value

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

Select	Answer
A	To improve the coupling between the primary and secondary
B	To prevent parasitic oscillations due to resistive losses in the primary
C	To accommodate the higher current of the primary
D	To insure that the volume of the primary winding is equal to the volume of the secondary winding

22. - G6A13

Why is the polarity of applied voltages important for polarized capacitors?

Select	Answer
A	The capacitor could overheat and explode
B	Incorrect polarity can cause the capacitor to short-circuit
C	Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
D	All of these choices are correct

23. - G6B13

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

Select	Answer
A	PL-259
B	RJ-11
C	DB-25
D	Octal

24. - G7A04

What is the peak-inverse-voltage across the rectifier in a half-wave power supply?

Select	Answer
A	Equal to the normal output voltage of the power supply
B	One-half the normal peak output voltage of the power supply
C	One-half the normal output voltage of the power supply
D	Two times the normal peak output voltage of the power supply

25. - G7B06

What is a shift register?

Select	Answer
A	A digital mixer
B	An array of operational amplifiers used for tri-state arithmetic operations
C	A clocked array of circuits that passes data in steps along the array
D	An analog mixer

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Select	Answer
A	Detector
B	Discriminator
C	IF amplifier
D	Balanced modulator

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 modulation
C	Frequency conversion
D	Frequency convolution

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	Mixer
B	Reactance modulator
C	Pre-emphasis network
D	Multiplier

29. - G8C03

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

Select	Answer
A	Footer
B	Directory
C	Header
D	Preamble

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	300 ohms
B	100 ohms
C	75 ohms
D	50 ohms

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It is unaffected by the height above ground
B	It steadily decreases
C	It peaks at about 1/8 wavelength above ground
D	It steadily increases

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

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They have poor harmonic rejection
B	They present low impedance on all design frequencies
C	They must be used with an antenna tuner
D	They must be fed with open wire line

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should not be installed in a wet area
B	It should limited to 10 feet in height
C	It should not be installed higher than you can reach
D	It should be installed such that it is protected against unauthorized access

35. - G0B09

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

Select	Answer
A	The resistance of solder is too high
B	Solder has too high a dielectric constant to provide adequate lightning protection
C	A soldered joint will likely be destroyed by the heat of a lightning strike
D	Solder flux will prevent a low conductivity connection