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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?

SelectAnswer
A1875 kHz
B3750 kHz
C4005 kHz
D3900 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

SelectAnswer
AOnly when the information is of a routine, personal nature
BDuring a declared communications emergency
COnly with Special Temporary Authorization from the FCC
DTo control a space station

3. - G1C03

What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?

SelectAnswer
A2.8 kHz
B1.8 kHz
C3 kHz
D5.6 kHz

4. - G1D08

Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?

SelectAnswer
ANone of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner
BThe person must hold an FCC granted Amateur Radio license of General Class or above
CThe person must be a resident of the U.S. for a minimum of 5 years
DThe person's home citizenship must be in ITU region 2

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?

SelectAnswer
AWhen messages are not encrypted
BWhen messages are encrypted
CWhen under automatic control
DUnder no circumstances

6. - G2A11

What does the expression "CQ DX" usually indicate?

SelectAnswer
AThe caller is listening for a station in Germany
BThe caller is looking for any station outside their own country
CA distress call
DA general call for any station

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

SelectAnswer
AApproximately 10 kHz
BApproximately 6 kHz
CBetween 150 and 500 Hz
DApproximately 3 kHz

8. - G2C04

What does the Q signal "QRL?" mean?

SelectAnswer
A"Will you keep the frequency clear?"
B"Are you listening only for a specific station?"
C"Are you operating full break-in" or "Can you operate full break-in?"
D"Are you busy?", or "Is this frequency in use?"

9. - G2D05

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

SelectAnswer
AOnly when the foreign country is a member of the International Amateur Radio Union
BWhen the contact is with amateurs in any country as long as the communication is conducted in English
COnly when the foreign country has a formal third party agreement filed with the FCC
DWhen the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

SelectAnswer
ASkywarn
BWinlink
CRTTY
DARES

11. - G3A13

What does the A-index indicate?

SelectAnswer
AThe amount of polarization of the Sun's electric field
BThe solar radio flux at Boulder, Colorado
CThe relative position of sunspots on the surface of the Sun
DThe long term stability of the Earth's geomagnetic field

12. - G3B08

What does MUF stand for?

SelectAnswer
AThe Maximum Usable Frequency during a 24 hour period
BThe Minimum Usable Frequency during a 24 hour period
CThe Maximum Usable Frequency for communications between two points
DThe Minimum Usable Frequency for communications between two points

13. - G3C05

Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?

SelectAnswer
AThe D layer absorbs signals at these frequencies during daylight hours
BThe F layer is unstable during daylight hours
CThe E layer is unstable during daylight hours
DThe F layer absorbs signals at these frequencies during daylight hours

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

SelectAnswer
AImproper action of ALC distorts the signal and can cause spurious emissions
BAll of these choices are correct
CWhen using digital modes, too much ALC activity can cause the transmitter to overheat
DALC will invert the modulation of the AFSK mode

15. - G4B14

What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?

SelectAnswer
AWhen high precision is desired
BWhen adjusting tuned circuits
CWhen measuring the frequency of an oscillator
DWhen testing logic circuits

16. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

SelectAnswer
ANot using a balun or line isolator to feed balanced antennas
BLack of rectification of the transmitter's signal in power conductors
CArcing at a poor electrical connection
DUsing a balun to feed an unbalanced antenna

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?

SelectAnswer
AAt least 3 kHz above the edge of the band
BYour displayed carrier frequency may be set at the edge of the band
CAt least 1 kHz below the edge of the segment
DAt least 3 kHz below the edge of the band

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

SelectAnswer
AThe wire gauge of the DC power line to the transceiver
BThe antenna system
C"Picket Fencing" signal variation
DFCC rules limiting mobile output power on the 75-meter band

19. - G5A01

What is impedance?

SelectAnswer
AThe inverse of resistance
BThe electric charge stored by a capacitor
CThe force of repulsion between two similar electric fields
DThe opposition to the flow of current in an AC circuit

20. - G5B14

What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?

SelectAnswer
A5000 watts
B8.75 watts
C625 watts
D2500 watts

21. - G5C18

What is the value in microfarads of a 4700 nanofarad (nF) capacitor?

SelectAnswer
A0.47 microfarads
B47,000 microfarads
C4.7 microfarads
D47 microfarads

22. - G6A18

What is an advantage of using a ferrite core toroidal inductor?

SelectAnswer
AAll of these choices are correct
BMost of the magnetic field is contained in the core
CThe magnetic properties of the core may be optimized for a specific range of frequencies
DLarge values of inductance may be obtained

23. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

SelectAnswer
ALow power consumption
BBetter suited for power supply regulation
CHigh power handling capability
DBetter suited for RF amplification

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

SelectAnswer
AFaster switching time makes higher output voltage possible
BFewer circuit components are required
CAll of these choices are correct
DHigh frequency operation allows the use of smaller components

25. - G7B04

Which of the following describes the function of a two input NOR gate?

SelectAnswer
AOutput is high only when both inputs are high
BOutput is high when either or both inputs are low
COutput is low when either or both inputs are high
DOutput is low only when both inputs are high

26. - G7C07

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

SelectAnswer
AHF oscillator, prescaler, audio amplifier
BRF amplifier, detector, audio amplifier
CHF oscillator, mixer, detector
DRF amplifier, mixer, IF discriminator

27. - G8A02

What is the name of the process that changes the phase angle of an RF wave to convey information?

SelectAnswer
AAngle convolution
BPhase modulation
CPhase convolution
DRadian inversion

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?

SelectAnswer
AMixer
BReactance modulator
CPre-emphasis network
DMultiplier

29. - G8C02

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

SelectAnswer
AThe number varies
B7
C8
D5

30. - G9A03

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

SelectAnswer
A75 ohms
B100 ohms
C50 ohms
D300 ohms

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

SelectAnswer
ASlope the radials downward
BLengthen the radials
CSlope the radials upward
DShorten the radials

32. - G9C05

How does increasing boom length and adding directors affect a Yagi antenna?

SelectAnswer
AGain increases
BFront to back ratio decreases
CBeamwidth increases
DFront to side ratio decreases

33. - G9D04

What is the primary purpose of antenna traps?

SelectAnswer
ATo notch spurious frequencies
BTo prevent out of band operation
CTo permit multiband operation
DTo provide balanced feed point impedance

34. - G0A07

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

SelectAnswer
AA higher transmitter duty cycle permits greater short-term exposure levels
BA lower transmitter duty cycle permits greater short-term exposure levels
CHigh duty cycle transmitters are exempt from RF exposure requirements
DLow duty cycle transmitters are exempt from RF exposure evaluation 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?

SelectAnswer
AA soldered joint will likely be destroyed by the heat of a lightning strike
BSolder flux will prevent a low conductivity connection
CSolder has too high a dielectric constant to provide adequate lightning protection
DThe resistance of solder is too high