Humber/Ontario Real Estate Course 3 Exam Practice

Owner Smith is explaining the equipment used to remove solids and minerals from their well water. The system includes a semi-permeable membrane and a storage tank. This process is best known as:

1. Carbon filtration.

2. Reverse osmosis.

3. Chlorination injection.

4. Aquifer cleansing.

5. Distillation.

6. Ultrafiltration.

The correct answer is: Reverse osmosis.

The correct answer is reverse osmosis, which is a water purification process that utilizes a semi-permeable membrane to remove ions, molecules, and larger particles from drinking water. In this system, water is applied to one side of the membrane and pressure is used to separate the purified water from impurities, effectively filtering out solids and minerals. The storage tank serves to hold the purified water for use after it has been treated. Other methods listed, such as carbon filtration, involve different mechanisms, primarily focusing on adsorption of impurities rather than a physical barrier, like a membrane. Chlorination injection refers to the addition of chlorine to water for disinfection purposes, while aquifer cleansing typically relates to the natural or engineered remediation of groundwater. Distillation employs boiling water to separate contaminants based on different boiling points, and ultrafiltration is a process that uses membranes but operates at a larger pore size than reverse osmosis, resulting in less thorough impurity removal.