Wash and rinse tanks shall be equipped with devices to minimize internal cross contamination. Which device is specified?

• A. Internal baffles
• B. Temperature gauges
• C. Curtains
• D. Drainage

Answer: (A)

The main idea is to control how liquid moves inside the wash and rinse tanks so dirty water can’t easily contaminate the clean water or the items being washed. Internal baffles act as barriers inside a tank to shape and slow the flow. By creating separate flow paths and reducing turbulent mixing, they prevent short‑circuiting of dirty wash solution into the rinse area and keep contaminants from being carried back into areas meant to be clean. This helps maintain distinct wash and rinse conditions, which is crucial for preventing cross contamination during multi‑tank washing.

Temperature gauges provide information about heat but don’t stop cross‑contamination. Curtains could help in some setups to block splashes, but inside a single tank they won’t reliably prevent mixing. Drainage affects how water leaves the tank but doesn’t address the internal flow patterns that cause cross contamination. The baffles specifically target flow control inside the tank, which is why they’re the right choice here.