Final answer:
A permanent set irrigation system is a type of irrigation system where the pipes and sprinklers are permanently installed in the field. It is commonly used in large-scale farming operations.
Step-by-step explanation:
A permanent set irrigation system is a type of irrigation system where the pipes and sprinklers are permanently installed in the field. This system is designed for long-term use and requires less manual labor compared to other irrigation systems. It is commonly used in large-scale farming operations. For example, the image provided shows a permanent set irrigation system for a large farm.