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Exam (elaborations)

NCTI Fiber Testing & Maintenance:Frequent Questions With 100% Answers.
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14

March 2026

2025/2026

A+
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What is the primary principle behind how an OTDR works? A) Ohm's Law and conductivity. B) Rayleigh scattering and Fresnel reflection. C) Direct power measurement. D) Wavelength division multiplexing. correct answer: B 2: What happens to the OTDR's performance when you increase the pulse width? A) Resolution increases but distance decreases. B) The dynamic range increases, but the ability to distinguish close events decreases. C) The dead zone is eliminated. D) Only the color of t...
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Exam (elaborations)

NCTI Fiber Testing & Maintenance: 100 Exam Questions With Correct Answers Version 2026/2027.
Available in bundle

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14

March 2026

2025/2026
Available in bundle
:Analyzing OTDR Trace Anomalies and Mode Field Diameter Mismatch A technician is performing a maintenance sweep on a long-haul fiber link. The OTDR trace shows a "gainer" at a fusion splice located 20km from the source. This occurs when the fiber being joined has a larger Mode Field Diameter (MFD) than the fiber it is spliced into. What is the standard NCTI procedure for determining the actual loss? A) Accept the gainer as a perfect 0.00 dB splice. B) Perform a bidirectional test and av...
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