ETA -I Study Guide (Fiber Optics Installer Certification) (FOI) Questions and Answers An optical fiber works based off of a principle known as; - Answer ✔️✔️-Total Internal Reflection. The bending of light as it passes from one transparent material into another which h as a different refractive index is what? - Answer ✔️✔️-Refraction. Light is electromagnetic radiation in the wavelength range including visible, ultraviolet, X -rays and _______________. - Answer ✔️✔️-Infrared. What are the three parts of a typical optical fiber? - Answer ✔️✔️-Core, Cladding, buffer Coating. (3 C's) A simple fiber optic system consists of what four components? - Answer ✔️✔️-Transmitter, receiver, fiber, and connector. Which optical fiber is most suited for very high speed and long distance a pplications? - Answer ✔️✔️-Single -mode. The reduction of power as a signal passes through a system is called (Also known as signal loss); - Answer ✔️✔️-Attenuation. A fiber optic cable which has single -mode and multi -mode optical fibers is what kind of cab le? - Answer ✔️✔️-Hybrid. A fiber with it's core having numerous concentric layers of glass, with each layer having a lower index of refraction is what kind of fiber? What is the core size and how is it identified now? - Answer ✔️✔️-Multi -mode graded -index . The spreading of light pulses as they take different paths in traveling down a fiber is known as what? - Answer ✔️✔️-Modal Dispersion. What are the two widely used methods for installing buried fiber optic cables? - Answer ✔️✔️-
Trench and Plow methods. What configurations should be used when the center pull or backfeeding techniques are used to pull in cables? - Answer ✔️✔️-Figure 8's. During the installation of fiber optic cables, innerduct serves what two main purposes? - Answer ✔️✔️-Expansion and Prote ction.
Trench and Plow methods. What configurations should be used when the center pull or backfeeding techniques are used to pull in cables? - Answer ✔️✔️-Figure 8's. During the installation of fiber optic cables, innerduct serves what two main purposes? - Answer ✔️✔️-Expansion and Prote ction.
