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    Optical Fibers Communications Questions and Answers

    This set of Optical Communications Multiple Choice Questions & Answers (MCQs) focuses on “Optical Fibers”. 1. Multimode step index fiber has ___________ a) Large core diameter & large numerical aperture b) Large core diameter and small numerical aperture c) Small core diameter and large numerical aperture d) Small core diameter & small numerical aperture 2. ... Read more

    Optical Communications Questions and Answers – Optical Fibers

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    This set of Optical Communications Multiple Choice Questions & Answers (MCQs) focuses on “Optical Fibers”.

    1. Multimode step index fiber has ___________

    a) Large core diameter & large numerical aperture

    b) Large core diameter and small numerical aperture

    c) Small core diameter and large numerical aperture

    d) Small core diameter & small numerical aperture

    View Answer

    2. A typically structured glass multimode step index fiber shows as variation of attenuation in range of ___________

    a) 1.2 to 90 dB km-1 at wavelength 0.69μm

    b) 3.2 to 30 dB km-1 at wavelength 0.59μm

    c) 2.6 to 50 dB km-1 at wavelength 0.85μm

    d) 1.6 to 60 dB km-1 at wavelength 0.90μm

    View Answer

    3. Multimode step index fiber has a large core diameter of range is ___________

    a) 100 to 300 μm b) 100 to 300 nm c) 200 to 500 μm d) 200 to 500 nm View Answer

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    4. Multimode step index fibers have a bandwidth of ___________

    a) 2 to 30 MHz km b) 6 to 50 MHz km c) 10 to 40 MHz km d) 8 to 40 MHz km View Answer

    5. Multimode graded index fibers are manufactured from materials with ___________

    a) Lower purity

    b) Higher purity than multimode step index fibers.

    c) No impurity

    d) Impurity as same as multimode step index fibers.

    View Answer

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    6. The performance characteristics of multimode graded index fibers are ___________

    a) Better than multimode step index fibers

    b) Same as multimode step index fibers

    c) Lesser than multimode step index fibers

    d) Negligible View Answer

    7. Multimode graded index fibers have overall buffer jackets same as multimode step index fibers but have core diameters ___________

    a) Larger than multimode step index fibers

    b) Smaller than multimode step index fibers

    c) Same as that of multimode step index fibers

    d) Smaller than single mode step index fibers

    View Answer advertisement

    8. Multimode graded index fibers with wavelength of 0.85μm have numerical aperture of 0.29 have core/cladding diameter of ___________

    a) 62.5 μm/125 μm b) 100 μm/140 μm c) 85 μm/125 μm d) 50 μm/125μm View Answer

    9. Multimode graded index fibers use incoherent source only.

    a) True b) False View Answer advertisement

    10. In single mode fibers, which is the most beneficial index profile?

    a) Step index b) Graded index

    c) Step and graded index

    d) Coaxial cable View Answer

    11. The fibers mostly not used nowadays for optical fiber communication system are ___________

    a) Single mode fibers

    b) Multimode step fibers

    c) Coaxial cables

    d) Multimode graded index fibers

    View Answer

    12. Single mode fibers allow single mode propagation; the cladding diameter must be at least ___________

    a) Twice the core diameter

    b) Thrice the core diameter

    c) Five times the core diameter

    d) Ten times the core diameter

    View Answer

    13. A fiber which is referred as non-dispersive shifted fiber is?

    a) Coaxial cables

    b) Standard single mode fibers

    c) Standard multimode fibers

    d) Non zero dispersion shifted fibers

    View Answer

    14. Standard single mode fibers (SSMF) are utilized mainly for operation in ___________

    a) C-band b) L-band c) O-band

    d) C-band and L-band

    View Answer

    15. Fiber mostly suited in single-wavelength transmission in O-band is?

    a) Low-water-peak non dispersion-shifted fibers

    b) Standard single mode fibers

    c) Low minimized fibers

    d) Non-zero-dispersion-shifted fibers

    View Answer

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    [Solved] The fibers mostly not used nowadays for optical fiber communication system are

    Home Engineering Physics

    The fibers mostly not used now...

    Q.

    The fibers mostly not used nowadays for optical fiber communication system are

    A. single mode fibers

    B. multimode step fibers

    C. coaxial cables

    D. multimode graded index fibers

    Answer» A. single mode fibers

    Explanation: single mode fibers are used to produce polarization maintaining fibers which make them expensive. also the alternative to them are multimode fibers which are complex but accurate. so, single-mode fibers are not generally utilized in optical fiber communication.

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    Fiber mostly suited in single-wavelength transmission in O-band is?

    A fiber which is referred as non- dispersive shifted fiber is?

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    Multimode step index fibers have a

    Multimode graded index fibers with wavelength of 0.85μm have numerical aperture of 0.29 have core/cladding diameter of

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    स्रोत : mcqmate.com

    Fiber Optic MCQ Test & Online Quiz 2022

    Fiber Optic MCQ Test & Online Quiz; Practice below the best Fiber Optics MCQ Questions that check your basic knowledge of Fiber Optics. This Fiber Optics MCQ Test contains 25 Multiple Choice Questions. You have to select the right answer to the question. Apart from this, you can also download the Fiber Optics MCQ PDF below completely free.

    Fiber Optic MCQ Questions

    Last Updated: Jun 03, 2022,

    Posted in Interview Questions,

    25 Questions

    Take Fiber Optics MCQ Test & Online Quiz to Test your Knowledge

    Practice below the best Fiber Optics MCQ Questions that check your basic knowledge of Fiber Optics. This Fiber Optics MCQ Test contains 25 Multiple Choice Questions. You have to select the right answer to the question. Apart from this, you can also download the Fiber Optics MCQ PDF below completely free.

    1. Fiber optics was invented by .........

    Thomas Mensah Thomas Edison John Henry Holmes None of the above

    This is a modal window.

    No compatible source was found for this media.

    View Answer

    2. Fiber optic cable operate at frequencies near

    2 GHz 20 MHz 200 MHz 800 THz View Answer

    3. Which is the most beneficial index profile in single mode fibers?

    Step index Coaxial cable Graded index

    Step and graded index

    View Answer

    4. Which of the following statistics are used for calculations of strengths of optical fibers?

    Edwin statistics Gamma statistics Newton statistics Wei-bull statistics View Answer

    5. The micro-bending losses are depend on ...........

    Diameter Core material Refractive index Mode and wavelength

    Download Free : Fiber Optics MCQ PDF

    View Answer

    6. Which of the following can induce a considerable amount of attenuation in optical fibers?

    Dispersion Micro-bending Radiation Exposure

    Diffusion of hydrogen

    View Answer

    7. ............. categories exists in case of cable design.

    2 3 4 5 View Answer

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

    Light scattering Light collection Light dispersion Light polarisation View Answer

    9. Which of the following is not a typical transmitter function In an optical fibre communication system?

    Decoding of input data

    Decoding of input data

    Electrical to optical conversion

    Recoding to match output standard

    View Answer

    10. ............. are not used nowadays for optical fibre communication system.

    Coaxial cable Multimode fibre Single-mode fibre

    Multimode graded-index fibres

    View Answer

    11. Which component provides additional strength and prevents the fiber from any damage?

    Core Cladding Buffer Coating None of the above View Answer

    12. Which kind of dispersion phenomenon gives rise to pulse spreading in single mode fibers?

    Material Intermodal Intramodal None of the above View Answer

    13. Which kind of optical devices are adopted or applicable for routing signals from one waveguide to another?

    Optical Splitter Optical Coupler Optical Combiner None of the above View Answer

    14. Which of the following method determines the dispersion limitation of an optical link?

    Rise time budget Link power budget Both A & B View Answer

    15. Which of the following is the width of the range of wavelengths emitted by the light source?

    Bandwidth Beamwidth Spectral width

    Chromatic Dispersion

    View Answer

    16. When a beam of light enters one medium from another, ........... will not change?

    Speed Direction Frequency Wavelength View Answer

    17. The wavelength of light has no role in ..........

    Reflection Diffraction Interference Polarization View Answer

    18. Which kind of dispersion is caused by the difference in the propagation times of light rays that take different paths down a fiber?

    Modal dispersion Delay dispersion Material dispersion

    Wavelength dispersion

    View Answer

    19. Which is the average insertion loss of fusion splice in fiber optics?

    0.9 dB 0.19 dB 0.09 dB 0.009 dB View Answer

    20. Which type of fiber has the highest modal dispersion?

    Graded index mode

    Step-index multimode

    Step-index single mode

    Graded index multimode

    View Answer

    21. .............. is used as an optical transmitter on the Fiber Optical Communications.

    APD LED PIN diode LSA diode View Answer

    22. Which of the following is regarded as an inelastic scattering of a photon?

    Hall Effect Kerr Effect Miller Effect Raman Effect View Answer

    23. Which of the following is responsible for generating attenuation of an optical power in fiber?

    Scattering Absorption Waveguide effect All of the Above View Answer

    24. In circulator, an optical path of signal follows ...............

    A closed loop An open loop A double loop None of above View Answer

    25. Which of the following fibers does not used nowadays for optical fiber communication systems?

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