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Activated sludge and trickling filter process MCQs Civil

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1. The activated sludge process is primarily used for:




2. In an activated sludge system, microorganisms grow in:




3. The purpose of the aeration tank in activated sludge is to:




4. Secondary clarifier in activated sludge system is used for:




5. Trickling filter process involves:




6. The main difference between trickling filter and activated sludge is:




7. Return activated sludge (RAS) in activated sludge system is:




8. Hydraulic retention time (HRT) in aeration tanks is usually:




9. The organic matter removal in activated sludge is measured by:




10. Trickling filters are commonly made of:




11. Sloughing in trickling filter refers to:




12. The main advantage of activated sludge over trickling filter is:




13. In trickling filters, the airflow is primarily for:




14. Sludge age or mean cell residence time (MCRT) is an important parameter for:




15. Organic loading rate in trickling filter is expressed in:




16. Diffused aeration in activated sludge:




17. Trickling filter effluent is usually:




18. Activated sludge process can remove:




19. Recirculation ratio in trickling filter system is:




20. The key disadvantage of trickling filters is:




21. In activated sludge, sludge volume index (SVI) is used to:




22. Trickling filter media provides:




23. Filamentous bulking in activated sludge leads to:




24. Trickling filter is classified as:




25. Oxygen requirement in activated sludge process is determined by:




26. Trickling filter effluent may require:




27. Extended aeration is a modification of:




28. Sludge from trickling filter is typically:




29. Nitrification in activated sludge requires:




30. The main operational control parameter in activated sludge is:




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