Name a common material used for gas pipeline construction.

• A. Steel
• B. Polyethylene
• C. Aluminum
• D. Copper

Answer: (B)

Polyethylene is a common material used for gas pipeline construction primarily due to its excellent resistance to corrosion and its lightweight nature. It is flexible, which allows for easier installation and can accommodate ground movement without risk of damage. Additionally, polyethylene's properties make it suitable for a wide range of applications in the gas distribution system, especially in urban areas where complex infrastructure is involved. Its ability to withstand harsh environmental conditions while maintaining a strong seal makes it a preferred choice for many utility companies.

While other materials like steel are used in high-pressure applications and aluminum has certain benefits, polyethylene's advantages in terms of installation ease, maintenance, and durability in typical gas pipeline scenarios make it especially prominent in the industry.