NCTI MT2 - MT3 questions with correct answers

In what applications is a splice closure used? Answer Splice closures are used to protect optical fibers and splices against a full range of environmental changes in aerial installations or below ground in vaults. When preparing a fiber-optic cable for splicing, what is the purpose of removing approximately 2.5 cm (1 inch) of jacket and any armor that is present, from the end of the cable? Answer To access the cable's rip cord and to check the cutting depth of the knife or ringing tool what does water do to the glass core of an optical fiber? Answer Water causes the glass core of the optical fiber to become opaque, which degrades the signal as it's transported through the fiber. when preparing a splice closure, what should be done with the fiberglass rod strength member that runs down the center of loose-tube fiber-optic cable? Answer Trim the strength member back for convenience, but leave it long enough to be tightly clamped to a strain-relief lug in the closure. What is the purpose of splice trays inside splice closures? Answer Splice trays are designed to provide protection for mechanical splices, fusion splice protectors, and optical splitters as well as provide storage for the required fiber slack. How should the buffer tubes be secured in the closure? Answer The buffer tubes should be secured with tie wraps to allow slight movement without pulling or stressing the optical fibers.