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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band
C	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
D	Amateur stations are allowed to use the band only during emergencies

2. - G1B04

Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?

Select	Answer
A	All of these choices are correct
B	The FCC must have declared a state of emergency
C	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies
D	The communications must directly relate to the immediate safety of human life or protection of property and there must be no other means of communication reasonably available before or at the time of the event

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

4. - G1D01

Who may receive credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Anyone who held an FCC issued amateur radio license that has been expired for not less than 5 years and not more than 15 years
B	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
C	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
D	Any person who can demonstrate that they once held an FCC issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Robotically controlled station
B	Automatically controlled digital station
C	Fail-safe digital station
D	Locally controlled station

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	It occupies less bandwidth
B	It allows "hands free" operation
C	It provides more power output
D	The received signal is more natural sounding

7. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	When they seize your equipment for use in disaster communications
B	When the President's War Emergency Powers have been invoked
C	When they declare a temporary state of communication emergency
D	Only when all amateur stations are instructed to stop transmitting

8. - G2C09

What does the Q signal "QSL" mean?

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

9. - G2D08

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

Select	Answer
A	To help with a reply if the FCC requests information
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	The ITU requires a log of all international contacts

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	Transmit a connect message on the station's published frequency
C	Send an email to the system control operator
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. - G3B08

What does MUF stand for?

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

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

14. - G4A10

What is the purpose of an electronic keyer?

Select	Answer
A	Automatic generation of strings of dots and dashes for CW operation
B	Computer interface for PSK and RTTY operation
C	VOX operation
D	Automatic transmit/receive switching

15. - G4B15

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

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

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Forward-biased diode
B	Bypass inductor
C	Reverse-biased diode
D	Bypass capacitor

17. - G4D02

Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

Select	Answer
A	It reduces harmonic distortion
B	It increases average power
C	It increases peak power
D	It reduces intermodulation distortion

18. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To increase the power handling capacity of a whip antenna
B	To allow remote tuning
C	To electrically lengthen a physically short antenna
D	To allow automatic band changing

19. - G5A04

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

Select	Answer
A	Reluctance
B	Conductance
C	Reactance
D	Admittance

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It equals the sum of the currents through each branch
B	It is the sum of the reciprocal of each individual voltage drop
C	It decreases as more parallel branches are added to the circuit
D	It equals the average of each branch current

21. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A resistor in series
B	A capacitor in series
C	An inductor in series
D	A capacitor in parallel

22. - G6A02

What is an advantage of the low internal resistance of nickel-cadmium batteries?

Select	Answer
A	High discharge current
B	High voltage
C	Long life
D	Rapid recharge

23. - G6B11

What is a microprocessor?

Select	Answer
A	A microwave detector, amplifier, and local oscillator on a single integrated circuit
B	A computer on a single integrated circuit
C	A low voltage amplifier used in a microwave transmitter modulator stage
D	A low power analog signal processor used as a microwave detector

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	Two times the normal peak output voltage of the power supply
D	One-half the normal output voltage of the power supply

25. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the divider
B	The number of stages in the counter
C	The time delay of the lag circuit
D	The inductance and capacitance in the tank circuit

26. - G7C09

Which of the following is needed for a Digital Signal Processor IF filter?

Select	Answer
A	A digital processor chip
B	A digital to analog converter
C	An analog to digital converter
D	All of the these choices are correct

27. - G8A06

What is one advantage of carrier suppression in a single sideband phone transmission versus full carrier amplitude modulation?

Select	Answer
A	Audio fidelity is improved
B	Available transmitter power can be used more effectively
C	Greater modulation percentage is obtainable with lower distortion
D	Simpler receiving equipment can be used

28. - G8B01

What receiver stage combines a 14.250 MHz input signal with a 13.795 MHz oscillator signal to produce a 455 kHz intermediate frequency (IF) signal?

Select	Answer
A	VFO
B	BFO
C	Mixer
D	Discriminator

29. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Viterbi
B	Volumetric
C	Varicode
D	Binary

30. - G9A08

If the SWR on an antenna feed line is 5 to 1, and a matching network at the transmitter end of the feed line is adjusted to 1 to 1 SWR, what is the resulting SWR on the feed line?

Select	Answer
A	1 to 1
B	Between 1 to 1 and 5 to 1 depending on the characteristic impedance of the line
C	Between 1 to 1 and 5 to 1 depending on the reflected power at the transmitter
D	5 to 1

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

32. - G9C11

What is the purpose of a gamma match used with Yagi antennas?

Select	Answer
A	To increase the main lobe gain
B	To match the relatively low feed point impedance to 50 ohms
C	To increase the front-to-back ratio
D	To match the relatively high feed point impedance to 50 ohms

33. - G9D09

Which of the following is an application for a Beverage antenna?

Select	Answer
A	Portable direction finding at lower HF frequencies
B	Directional receiving for low HF bands
C	Portable direction finding at higher HF frequencies
D	Directional transmitting for low HF bands

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
B	A lower transmitter duty cycle permits greater short-term exposure levels
C	A higher transmitter duty cycle permits greater short-term exposure levels
D	High duty cycle transmitters are exempt from RF exposure requirements

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