RCDD Chapter 1 Principles Of Transmission

175 Questions | Total Attempts: 27

SettingsSettingsSettings
Please wait...
RCDD Chapter 1 Principles Of Transmission

Registered Communications Distribution Designer (RCDD)


Questions and Answers
  • 1. 
    WDM uses a series of lenses to refract and direct light pulses into a single optical fiber that carries the combined wavelengths
    • A. 

      True

    • B. 

      False

  • 2. 
    What are the two types of attenuators
    • A. 

      Fixed

    • B. 

      Random

    • C. 

      Variable

    • D. 

      Adjustable

  • 3. 
    Loss variations due to temperature changes can sometimes be as high as
    • A. 

      1 dB/km

    • B. 

      2 dB/km

    • C. 

      3 dB/km

    • D. 

      4 dB/km

  • 4. 
    Wavelength areas that are most suitable for optical communications are called:
    • A. 

      Spectrums

    • B. 

      Windows

    • C. 

      Layers

    • D. 

      Stacks

  • 5. 
    The outer most part of a fiber is called the cladding
    • A. 

      True

    • B. 

      False

  • 6. 
    Visible light wavelength is:
    • A. 

      200-400 nm

    • B. 

      300-700 nm

    • C. 

      400-700 nm

    • D. 

      500-800 nm

  • 7. 
    The bandwidth of a multimode system is a function of:
    • A. 

      Chloric dispersion

    • B. 

      Chromatic dispersion

    • C. 

      Medial dispersion

    • D. 

      Modal dispersion

  • 8. 
    Bandwidth is the information carrying capacity of a system.
    • A. 

      True

    • B. 

      False

  • 9. 
    What is the numerical aperture of 62.5/125 fiber
    • A. 

      0.20

    • B. 

      0.25

    • C. 

      0.275

    • D. 

      .030

  • 10. 
    What is the center wavelength for a CD laser
    • A. 

      850 nm

    • B. 

      780 nm

    • C. 

      1300 nm

    • D. 

      1310 nm

    • E. 

      1550 nm

  • 11. 
    What is the numerical aperture of 50/125 fiber:
    • A. 

      0.20

    • B. 

      0.250

    • C. 

      0.275

    • D. 

      0.30

  • 12. 
    Mutual conductance G(line) is expressed in
    • A. 

      Siemens (S)

    • B. 

      Ohms

    • C. 

      Henrys (H)

    • D. 

      Farads (F)

  • 13. 
    A higher attenuation number is better
    • A. 

      True

    • B. 

      False

  • 14. 
    Attenuation to Crosstalk ratio (ACR) is calculated how:
    • A. 

      Received noise - received signal

    • B. 

      Minimum NEXT loss - maximum attenuation

    • C. 

      Maximum attenuation - minimum NEXT loss

  • 15. 
    NEXT loss is dominated by components in the near zone, what is defined as the near zone:
    • A. 

    • B. 

    • C. 

    • D. 

  • 16. 
    The mutual capacitance C(line) is expresssed in
    • A. 

      Henrys (H)

    • B. 

      Farads (F)

    • C. 

      Ohms

    • D. 

      Siemans (S)

  • 17. 
    The series resistance R(line) is expressed in:
    • A. 

      Watts

    • B. 

      Ohms

    • C. 

      Amps

    • D. 

      Volts

  • 18. 
    The series inductance L(line) is expressed in:
    • A. 

      Ohms

    • B. 

      Henrys (H)

    • C. 

      Farads (F)

    • D. 

      Siemens (S)

  • 19. 
    What is the rate for ATM (STS-3)
    • A. 

      12.96 Mb/s

    • B. 

      25.6 Mb/s

    • C. 

      51.8 Mb/s

    • D. 

      155 Mb/s

  • 20. 
    DS-1C systems are no longer being deployed.
    • A. 

      True

    • B. 

      False

  • 21. 
    Good internet performance requires a down-to-upstream ratio of at least:
    • A. 

      2:1

    • B. 

      5:1

    • C. 

      10:1

    • D. 

      15:1

  • 22. 
    What is the rate for ATM (STS-1)
    • A. 

      12.96 Mb/s

    • B. 

      25.6 Mb/s

    • C. 

      51.8 Mb/s

    • D. 

      155 Mb/s

  • 23. 
    The rate at which the digital signal state changes and the bit transmission rate are the same
    • A. 

      True

    • B. 

      False

  • 24. 
    When converting digital data to digital signals, what are the two common methods of encoding:
    • A. 

      Manchester

    • B. 

      Winchester

    • C. 

      Alternate mark inversion (AMI)

    • D. 

      Alternate bit inversion (ABI)

  • 25. 
    The bit is the basic unit of digital data
    • A. 

      True

    • B. 

      False

Related Topics
Back to Top Back to top