What describes the component that expands and contracts with temperature changes?

• A. Smaller Diameter
• B. Merge
• C. Double-slip
• D. Shorter Length

Answer: (C)

When temperature changes, materials expand or contract. To keep connections intact and avoid stress, engineers use joints that can slide or extend as needed. A double-slip joint is designed for this purpose: it provides two sliding interfaces between pipe sections, allowing the overall length to increase or decrease with temperature while maintaining a sealed, connected system. That capability to accommodate movement makes it the right description for a component that expands and contracts with temperature changes. The other options describe geometric or qualitative traits (like diameter, length, or an unrelated term) that don’t inherently address how a part responds to thermal movement.