Topic: Production Engineering
Mass production of seamless tubes is by the process of
- A. Rolling
- B. Spinning
- C. Welding
- D. Extrusion
Answer: D. Extrusion
Explanation: Extrusion is the standard manufacturing process used for the mass production of seamless tubes. The process involves forcing a hot metal billet through a die with a mandrel placed in the center, producing a continuous, seamless hollow cross-section with good mechanical properties.