If a reverse osmosis fresh water generating...

🔍 Key Concepts

• Reverse osmosis (RO) flow path – seawater in → pre‑filters → high‑pressure pump → membrane → freshwater outlet → post‑treatment • Where salinity is measured – is the alarm usually on the product water line or on the feed/brane reject line? • Function of each component – what affects salt content vs what affects cleanliness/sterility

💭 Think About

• Trace the water path and ask yourself: which component, if it failed or became ineffective, would actually let more salt pass into the freshwater outlet? • Consider which option treats salt content and which options treat clarity/sterility or protect the membrane. • Which action is typically taken FIRST when the product water salinity rises, before doing more invasive chemical or mechanical work?

✅ Before You Answer

• Identify where the salinity sensor is installed in a typical RO system (usually on the product/freshwater outlet). • Match each choice to whether it primarily affects salinity (TDS – total dissolved solids) or bacteria/particles/equipment protection. • Think about standard RO troubleshooting: when TDS in product water increases, what maintenance step is normally performed as the primary response?

If a reverse osmosis fresh water generating unit has a high salinity alarm associated with the freshwater outlet, what should be done?

The membrane modules should be flushed and cleaned.

The post-treatment sterilizer should be serviced.

The pre-treatment chemical doser should be serviced.

The pre-filters should be serviced by cleaning or replacement.

🔍 Key Concepts

💭 Think About

✅ Before You Answer