Which term describes a system that moves materials automatically?

• A. Safety First
• B. Ground Fault
• C. Poly Chain
• D. Conveyor System

Answer: (D)

A system that moves materials automatically is a conveyor system. Conveyors are designed to transport goods along a path in factories or warehouses, using different methods such as powered belts, roller tracks, or chain-driven links. They integrate a drive mechanism, supporting structure, and controls (sensors, switches, and sometimes PLCs) to automatically start, stop, and regulate movement, which improves throughput and reduces manual handling.

Safety First describes a general safety principle rather than a moving-materials system. Ground Fault is an electrical fault condition involving unintended current paths to earth and isn’t about material transport. Poly Chain refers to a type of power-transmission belt or drive component, which is a part of a drive system rather than a complete automatic material-moving system.