CRCST Practice Exam

Which system is used to treat the final rinse water used for cleaning?

1. Distillation

2. Deionization

3. Filtration

4. Reverse osmosis

The correct answer is: Deionization

Deionization is the system used to treat the final rinse water used for cleaning. Deionization involves the removal of ions in water by exchanging cations and anions with hydrogen and hydroxyl ions. This process helps to eliminate impurities and minerals from the water, making it suitable for final rinsing in the cleaning process. Distillation involves boiling water to produce steam and then condensing it back into liquid form, which may not be the most efficient method for treating final rinse water in this context. Filtration is the process of passing water through a filter to remove impurities, but it may not effectively remove ions as deionization does. Reverse osmosis is a process that uses a semi-permeable membrane to remove ions, molecules, and larger particles from water, but deionization is more commonly used for treating final rinse water in cleaning processes.