Fiber Installation Test QUESTIONS WITH Answers

Fiber Installation Test QUESTIONS WITH
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Answers


All fiber-optic communication systems must contain - CORRECT
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ANSWERS ✔✔An optical fiber transmission medium.
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The optical fiber core - CORRECT ANSWERS ✔✔Transmits the
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optical signal, and its structure and
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chemical makeup are critical to fiber operation.
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Wavelengths used in a fiber-optic communication system -
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CORRECT ANSWERS ✔✔Include 1,310 nm and 1,550 nm in
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single-mode transmission systems. |\ |\




As a lightwave enters an optical fiber, - CORRECT ANSWERS
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✔✔Its speed decreases, and the lightwave refracts at an angle.
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Attenuation in fiber - CORRECT ANSWERS ✔✔Can be caused by
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absorption, scattering, macrobends, and fiber numerical aperture
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mismatch.

, Which of the following is not an advantage of optical fiber? -
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CORRECT ANSWERS ✔✔Fiber carries more electrical current and
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radiates more energy than coaxial cable.
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Which of the following is true about light source selection criteria? -
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CORRECT ANSWERS ✔✔Cost should never be a higher concern
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than the quality of the signal required to meet system performance.
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Laser diodes - CORRECT ANSWERS ✔✔Being applied for the
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upstream transmission from homes and businesses are DFB lasers,
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due to the increased bandwidth demands of voice and data services.
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Which of the following is not true about optical detector selection
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criteria? - CORRECT ANSWERS ✔✔Silicon is a more suitable
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photodetector material than indium gallium arsenide for |\ |\ |\ |\ |\ |\ |\



wavelengths of 1,310 or 1,550 nm. |\ |\ |\ |\ |\




Avalanche photodiode detectors - CORRECT ANSWERS
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✔✔Require high stability power supplies because bias voltages to
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create high electrical fields also must be high.
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Which of the following statements about signals at the master
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headend is false? - CORRECT ANSWERS ✔✔The headend handles
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