Quiz  /  Fiber Optics MCQ

  • 1. 
    Data signal with minimum error is generated by which among the following

  • Signal processing circuits
  • Photodiode
  • Linear circuitry
  • None of the above

  • 2. 
    Which among the following is described by the concept of numerical aperture in an optical fibre?

  • Light collection
  • Light scattering
  • Light dispersion
  • Light polarisation

  • 3. 
    In an optical fibre communication system, which among the following is not a typical transmitter function?

  • Coding for error protection
  • Decoding of input data
  • Electrical to optical conversion
  • Recoding to match output standard

  • 4. 
    In a single-mode fibre, how does the fraction of energy travelling through bound mode appear in the cladding?

  • As a crescent wave
  • As a gibbous wave
  • As an evanescent wave
  • All the above

  • 5. 
    Which among the following fibre optic cables have a core of size 480 μm to 980 μm and made up of polymethylmethacrylate?

  • Glass fibre optic cable
  • Plastic fibre optic cable
  • Plastic clad silica fibre optic cable
  • All of the above

  • 6. 
    A ray of light will undergo total internal reflection if it

  • Goes from rarer medium to denser medium
  • Incident at an angle less than the critical angle
  • Strikes the interface normally
  • Incident at an angle greater than the critical angle

  • 7. 
    Which of the following is not due to total internal reflection of light?

  • Brilliance of diamond
  • Mirage formation
  • Optical fibre working
  • Rainbow formation

  • 8. 
    The fibres not used nowadays for optical fibre communication system are

  • Single-mode fibre
  • Multimode fibre
  • Coaxial cable
  • Multimode graded-index fibres

  • 9. 
    In single-mode fibres, the cladding diameter must be at least

  • Five times the core diameter
  • Thrice the core diameter
  • Ten times the core diameter
  • Twice the core diameter
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