Certified Fiber Optics Practice Exam

What component of a fiber optic cable helps to manage tensile stresses?

1. Protective coating

2. Strength members

3. Buffer

4. Jacket

The correct answer is: Strength members

The strength members are a crucial component of fiber optic cables responsible for managing tensile stresses. These are typically materials like aramid fibers or steel that are incorporated into the cable design. Their primary function is to provide the necessary support to maintain the integrity of the fibers under tension and prevent them from being damaged during installation, handling, or environmental changes. When tensile forces are applied to the fiber optic cable, the strength members absorb these stresses, safeguarding the delicate optical fibers within. In contrast, the protective coating primarily serves as a first layer of defense against environmental factors and physical damage but does not specifically enhance tensile strength. The buffer provides additional protection and helps in the positioning of the fiber but does not contribute significantly to tensile management either. The outer jacket acts as a durable outer layer that helps to protect the entirety of the cable but is not specifically designed to handle tensile forces. Thus, the strength members play an essential role in ensuring that the fiber optic cable can withstand stretching and pulling forces without degrading the performance of the optical fibers enclosed within.