Global Chemicals & Maintenance Systems Interview Questions and Answers

RO (Reverse Osmosis) is a water purification system that uses a semi-permeable membrane to remove impurities and contaminants from water.

• RO system consists of a pre-treatment stage to remove large particles and sediment from the water.

• The water then passes through a semi-permeable membrane that allows only water molecules to pass through, while blocking impurities.

• The membrane is typically made of thin film composite (...read more

Oxidation reduction potential (ORP) is a measure of the tendency of a substance to gain or lose electrons in a chemical reaction.

• ORP indicates the oxidizing or reducing power of a substance.

• It is measured in millivolts (mV) and is used to monitor and control water treatment processes.

• A positive ORP value indicates the presence of oxidizing agents, while a negative value indicates reducing agents.

• ORP is commonly used in...read more