Vita - Set 2 V1 Ure Part 2

18 Questions

Settings
Please wait...
Vita - Set 2 V1 Ure Part 2

.


Questions and Answers
  • 1. 
    High-altitude electromagnetic pulse is a wideband phenomenon that involves whichfrequency range?
    • A. 

      1 hertz to 1 kilohertz

    • B. 

      1 hertz to 1 gigahertz

    • C. 

      10 hertz to 10 kilohertz

    • D. 

      10 hertz to 10 gigahertz

  • 2. 
    High-altitude electromagnetic pulse environment protection is important for critical, timeurgent mission systems because it
    • A. 

      Is a problem for electronic components in satellites and reentry vehicles

    • B. 

      Has a vertical amplitude that decreases inversely with distance, but remains significant for many kilometers

    • C. 

      Has very intense radial electrical fields, azimuthal magnetic fields, and time-varying air conductivity

    • D. 

      Is the only nuclear environment that may be imposed on many systems simultaneously with the expenditure of very few weapons

  • 3. 
    A system-generated electromagnetic pulse is a problem for satellites and reentry vehiclesthat are
    • A. 

      Susceptible to the wideband frequency phenomenon

    • B. 

      Directly exposed to nuclear radiations from a high-altitude burst

    • C. 

      Affected by the azimuthal magnetic fields and time-varying air conductivity

    • D. 

      Influenced by the signal fading or waveform distortion caused by the structured plasma field

  • 4. 
    Which distinct region of the source region electromagnetic pulse is produced by theinteractions between the weapon products and the earth’s atmosphere?
    • A. 

      Secondary.

    • B. 

      Radiated.

    • C. 

      Plasma.

    • D. 

      Source.

  • 5. 
    Atmospheric disturbances from initial nuclear radiation on higher frequencies affectcommunications by
    • A. 

      Blackout effects

    • B. 

      Absorption effects

    • C. 

      Scintillation effects

    • D. 

      Attenuation effects

  • 6. 
    Currents and voltages induced on power lines, cable links, and pipelines by electromagneticpulse are called
    • A. 

      Scintillation.

    • B. 

      Local effects

    • C. 

      Source region

    • D. 

      Long-line effects

  • 7. 
    Which type of filters are always used in combination with surge arresters?
    • A. 

      Linear.

    • B. 

      AC line

    • C. 

      DC line.

    • D. 

      Power line.

  • 8. 
    If the interference can be eliminated by disconnecting the receiving antenna, the source ofthe disturbance is most likely
    • A. 

      Line noise

    • B. 

      Internal to the radio

    • C. 

      External to the radio

    • D. 

      Radio receiver trouble

  • 9. 
    Little or no variations in the strength of the interfering signal when moving the receivingantenna for short distance normally indicates
    • A. 

      Enemy jamming

    • B. 

      Internal interference

    • C. 

      Radio receiver trouble

    • D. 

      Unintentional interference

  • 10. 
    What type of electromagnetic interference occurs when a receiver responds to off-frequencysignals?
    • A. 

      Rusty bolt

    • B. 

      Co-channel

    • C. 

      Brute force

    • D. 

      Spurious responses

  • 11. 
    Which type of intermodulation interference varies significantly with temperature andweather conditions?
    • A. 

      Transmitter.

    • B. 

      Rusty-bolt

    • C. 

      Spurious.

    • D. 

      Receiver.

  • 12. 
    What man-made noise results from voltage surges, arcing, or corona discharges?
    • A. 

      Relays.

    • B. 

      Lighting.

    • C. 

      Power line

    • D. 

      Switching equipment

  • 13. 
    How can you normally eliminate electromagnetic interference noise bursts caused bysodium and mercury vapor lights that have stopped working while the power is still applied?
    • A. 

      Change the bulb

    • B. 

      Ground out the light fixture

    • C. 

      Install a noise reject filter on the light

    • D. 

      Install a noise reject filter on the receiver

  • 14. 
    What Air Force program is used to resolve an electromagnetic interference incident?
    • A. 

      Mishap prevention

    • B. 

      Frequency management

    • C. 

      Electrostatic discharge control

    • D. 

      Spectrum interference resolution

  • 15. 
    At what level does the Air Force want electromagnetic interference problems resolved?
    • A. 

      Affected unit.

    • B. 

      Affected major command

    • C. 

      Electromagnetic environmental effects office

    • D. 

      Spectrum interference resolution office.

  • 16. 
    What do you do when you are reasonably sure electromagnetic interference exists?
    • A. 

      Request engineering assistance

    • B. 

      Contact the base frequency manager

    • C. 

      Systematically gather data for analysis

    • D. 

      Contact the spectrum interference resolution office

  • 17. 
    Who is initially responsible for reporting an electromagnetic interference?
    • A. 

      The operator

    • B. 

      Major command

    • C. 

      The frequency manager

    • D. 

      Federal Communications Commission

  • 18. 
    Who is tasked to provide interference resolution support to the unified commanders?
    • A. 

      The operator

    • B. 

      Joint spectrum center

    • C. 

      Installation spectrum manager

    • D. 

      Federal Communications Commission