Question 162Steam Plants - QMED

The correct answer is B) Duplex. A duplex filter/strainer unit allows you to clean the filter element while leaving the system online. This is because a duplex unit has two parallel filter chambers, allowing one chamber to be isolated and serviced while the other remains in operation, maintaining system flow. In contrast, simplex, canister, and bypass filter units do not have this dual-chamber design, so the system must be taken offline to clean or replace the filter element.