This document contains summaries of common mechanical project engineer interview questions and their answers. It discusses flow control, which focuses on efficiently moving materials through production by addressing bottlenecks. Materials requirement planning (MRP) uses computer systems to manage ordering materials to supply future production needs. Just-in-time (JIT) manufacturing aims to reduce waste by minimizing inventory and scheduling deliveries and production to optimize efficiency. The document provides tips for answering common interview questions about strengths, reasons for hiring, and other helpful interview materials and tips.