Why is a grid-loop system preferred?

Why is a grid-loop system preferred?

• A. It is cheaper to install.
• B. It uses fewer pipes.
• C. It allows isolation for repairs/contamination control and future expansion.
• D. It only works for small towns.

Answer: (C)

The main idea being tested is the operational flexibility and resilience of a grid-loop water distribution network. In a looped system, pipes form multiple pathways and valves are strategically placed so you can isolate a section without cutting off water to the whole area. This makes it possible to repair or replace a pipe, or to contain a contamination event, without shutting down service for everyone nearby. It also supports future expansion because new areas can be tied into the loop without redesigning the entire network, while still maintaining pressure and supply reliability through alternative routes. That’s why this option is the best: it directly expresses the advantages of isolation for repairs or contamination control and the ability to expand the system in the future. The other points aren’t the primary benefits of a grid-loop design—installation cost isn’t inherently lower, it doesn’t necessarily use fewer pipes (loops can require more piping to create redundancy), and the approach isn’t limited to small towns.

The main idea being tested is the operational flexibility and resilience of a grid-loop water distribution network. In a looped system, pipes form multiple pathways and valves are strategically placed so you can isolate a section without cutting off water to the whole area. This makes it possible to repair or replace a pipe, or to contain a contamination event, without shutting down service for everyone nearby. It also supports future expansion because new areas can be tied into the loop without redesigning the entire network, while still maintaining pressure and supply reliability through alternative routes.

That’s why this option is the best: it directly expresses the advantages of isolation for repairs or contamination control and the ability to expand the system in the future. The other points aren’t the primary benefits of a grid-loop design—installation cost isn’t inherently lower, it doesn’t necessarily use fewer pipes (loops can require more piping to create redundancy), and the approach isn’t limited to small towns.