A crew is pulling a heavy armored OSP cable using a tugger. They exceed the maximum rated pulling tension of 600 lbs for a few seconds. Later, tests show high attenuation across all fibers. What physically happened inside the cable?
Answers
AThe armor shield magnetized, disrupting the optical signal
BThe Kevlar aramid yarn melted from the friction
CThe fiber glass was stretched beyond its yield point, causing microscopic fractures and elevated attenuation
DThe cladding separated from the core
Correct answer: C — The fiber glass was stretched beyond its yield point, causing microscopic fractures and elevated attenuation
Exceeding the tensile load limit stretches the glass itself, causing micro-cracking and permanent attenuation increases, even if the cable jacket looks fine.
MIFOTRA exam practicealigned to TIA-568.3-D / ITU-T G.652·4 marks·Hard