Question

Composite products such as pressure vessels, liquid storage tanks and rocket motor castings are made by:

• A. Pultrusion
• B. Resin transfer molding
• C. Vacuum bagging
• D. Filament winding

Hint:

\textbf{Filament winding} is ideal for making strong, hollow, cylindrical composites like \textbf{pressure vessels and rocket casings}.

Answer 1

The Correct Option is D

Step 1: Understanding Filament Winding
Filament winding is a fabrication technique used to manufacture high-strength, hollow composite structures. In this process: - Continuous fiber filaments (like glass, carbon, or aramid) are soaked in resin and wound under tension over a rotating mandrel. - The resin is then cured (hardened), and the mandrel is removed. Step 2: Applications of Filament Winding
This method is ideal for producing: - Pressure vessels, - Storage tanks, - Rocket motor casings, - Pipes and gas cylinders. Step 3: Why Other Methods are Incorrect
- Pultrusion: Used for constant cross-section profiles (like rods, beams), not tanks. - Resin transfer molding (RTM): Suitable for complex closed-mold shapes, not large cylindrical vessels. - Vacuum bagging: A curing technique used in laminates, not for hollow cylindrical casting. Conclusion: The most suitable and widely used method for manufacturing pressure vessels and similar components is filament winding.