Which reinforcement type is described as metals or alloys with relatively large diameters?

• A. Fibers
• B. Whiskers
• C. Wires
• D. Particulates

Answer: (C)

In reinforcement geometry, size and shape define the category. Particulates are small, roughly spherical particles; fibers are elongated but still quite thin with a high length-to-diameter ratio; whiskers are even finer, extremely slender crystals. Wires, on the other hand, are thick elongated filaments made of metals or alloys, so they have relatively large diameters compared to fibers or whiskers. That thicker cross-section is what the description is pointing to, so the reinforcement type described is wires.