Composite materials can be manufactured to have what characteristic?

• A. The same strength in all directions
• B. Higher strength only in tension
• C. Different strengths in different directions
• D. Higher strength only in compression

Answer: (C)

An important idea here is that composite materials are anisotropic—their properties depend on direction because the reinforcing fibers carry most of the load along their length. By choosing fiber orientations and stacking plies at different angles, engineers tailor how strong the material is in each direction. This means you can create a laminate that is very strong along one axis but not as strong in another, giving different strengths in different directions. That’s why the best answer is that composites can be manufactured to have different strengths in different directions.

If you compare to isotropic materials, which would have the same strength in all directions, that's not how most fiber-reinforced composites behave. And saying strength is higher only in tension or only in compression isn’t a general rule for composites—the strength profile depends on layup and orientation, not a single mode.