Bar screens remove what?

• A. Fine grit
• B. Microorganisms
• C. Large untreatable objects
• D. Dissolved salts

Answer: (C)

Bar screens are a first line of defense that remove large solids from incoming wastewater to protect pumps and downstream equipment. They catch items like rags, plastic, wood, and other large, untreatable objects that could clog or damage pipes and machinery later on. That’s why the correct choice is large untreatable objects. Fine grit is handled by grit chambers, microorganisms are addressed by the biological treatment processes, and dissolved salts stay dissolved and require other treatment steps; screening doesn’t remove them.