Preview Questions Water Treatment Operator | Role Specific Skill

Question 1: How do you design a flow equalization tank for a water treatment plant to manage variable influent loads?

Which action should you take?

Choose only one option

By considering tank volume, detention time, and inlet/outlet design to balance flow and avoid peak surges

By designing for peak flow rates without considering average flow conditions

By focusing only on the tank size without considering flow variability

By ignoring flow variability and using a fixed detention time

Question 2: In a pump system, what is the primary purpose of using a strainer at the intake?

Which action should you take?

Choose only one option

To monitor the flow rate in the system

To increase the suction head for better performance

To provide a smooth surface for the pump to operate more efficiently

To prevent large debris from entering and damaging the pump components

Question 3: How do you conduct a chemical oxygen demand (COD) test, and why is it significant for assessing water quality?

Which action should you take?

Choose only one option

By testing for dissolved oxygen only and not COD

By estimating COD based on turbidity levels

By ignoring organic matter and focusing on inorganic contaminants

By using a closed reflux method with a strong oxidizing agent to determine the amount of organic material present

Question 4: In managing a water treatment facility, what is the main goal of asset management?

Which action should you take?

Choose only one option

To maximize the lifespan of critical assets while reducing downtime

To eliminate all manual labor in the plant operations

To replace all older equipment with newer, more efficient systems

To evaluate and improve the quality of water treatment chemicals

Question 5: How do you perform a proper pH test for a water sample and interpret the results?

Which action should you take?

Choose only one option

By measuring pH without considering sample contamination

By using paper strips and visually matching colors

By assuming that the pH is stable without any adjustments

By using a calibrated pH meter, ensuring proper sample handling, and adjusting for temperature variations

Question 6: What is the primary disadvantage of using colorimetric tests for water quality analysis?

Which action should you take?

Choose only one option

They only measure suspended solids, not dissolved contaminants

They are sensitive to interferences from colored water and turbidity

They require expensive reagents

They provide results only in qualitative terms, not quantitative