MCQOPTIONS
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MCQOPTIONS
This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the retention time considered for the anaerobic zone for the AO process for removing phosphorus? |
| A. | 1-3 hrs |
| B. | 3-5 hrs |
| C. | 5-8 hrs |
| D. | 8-11 hrs |
| Answer» B. 3-5 hrs | |
| 2. |
What is the power consumed for the anoxic process for the removal of nitrogen? |
| A. | 0.5-1.5 hrs |
| B. | 1.5-2 hrs |
| C. | 2-4 hrs |
| D. | 4-8 hrs |
| Answer» B. 1.5-2 hrs | |
| 3. |
What is the percentage of nitrogen removal that can be obtained from facultative lagoons? |
| A. | 50% |
| B. | 65% |
| C. | 85% |
| D. | 95% |
| Answer» E. | |
| 4. |
The maximum removal of nitrogen from septic tanks is 15%. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Excess nitrogen is present after secondary biological treatment. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
______ is the biochemical degradation of Organic-N into NH3 or NH4+. |
| A. | Nitrogen fixation |
| B. | Ammonification |
| C. | Nitrification |
| D. | Denitrification |
| Answer» C. Nitrification | |
| 7. |
WHAT_IS_THE_PERCENTAGE_OF_NITROGEN_REMOVAL_THAT_CAN_BE_OBTAINED_FROM_FACULTATIVE_LAGOONS??$ |
| A. | 50% |
| B. | 65% |
| C. | 85% |
| D. | 95% |
| Answer» E. | |
| 8. |
THE_MAXIMUM_REMOVAL_OF_NITROGEN_FROM_SEPTIC_TANKS_IS_15%.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
What is the retention time considered for the anaerobic zone for the AO process for removing phosphorus?$ |
| A. | 1-3 hrs |
| B. | 3-5 hrs |
| C. | 5-8 hrs |
| D. | 8-11 hrs |
| Answer» B. 3-5 hrs | |
| 10. |
What is the power consumed for the anoxic process for the removal of nitrogen?$ |
| A. | 0.5-1.5 hrs |
| B. | 1.5-2 hrs |
| C. | 2-4 hrs |
| D. | 4-8 hrs |
| Answer» B. 1.5-2 hrs | |
| 11. |
While designing SBR for the removal of nitrogen what is the MLVSS in mg/L assumed? |
| A. | 3000-500 |
| B. | 7000-9000 |
| C. | 9000-10000 |
| D. | 60000 |
| Answer» B. 7000-9000 | |
| 12. |
What is the residential time considered for the sequence batch reactor for the removal of nitrogen? |
| A. | 42-45 days |
| B. | 10-32 days |
| C. | 32-52 days |
| D. | 52-72 days |
| Answer» C. 32-52 days | |
| 13. |
What is the retention time considered for an anoxic zone for the removal of nitrogen for modified Ludzack Ettinger treatment system? |
| A. | 1-3 hrs |
| B. | 3-4 hrs |
| C. | 4-8 hrs |
| D. | 8-12 hrs |
| Answer» B. 3-4 hrs | |
| 14. |
When is internal recirculation required for preanoxic tank? |
| A. | SDNR<1 |
| B. | SDNR=1 |
| C. | SDNR =2-4 |
| D. | SDNR =4-6 |
| Answer» B. SDNR=1 | |
| 15. |
At what detention time maximum saturation rates are experienced in a denitrification process? |
| A. | 10-20 mins |
| B. | 72 mins |
| C. | 30-40 mins |
| D. | 22-24 mins |
| Answer» B. 72 mins | |
| 16. |
How is the SDNR related to the BOD? |
| A. | SDNR = 0.03 F/M |
| B. | SDNR = 0.3 F/M |
| C. | SDNR = 0.03/( F/M) |
| D. | SDNR = 3 F/M |
| Answer» B. SDNR = 0.3 F/M | |
| 17. |
What is the SDNR assumed while designing postanoxic tank? |
| A. | 0.1-0.4 |
| B. | 1.5-2 |
| C. | 0.8-1 |
| D. | 3-4 |
| Answer» B. 1.5-2 | |
| 18. |
Excess nitrogen is present after secondary biological treatment? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 19. |
What is the minimum quantity of nitrogen present in untreated wastewater? |
| A. | 5 mg/L |
| B. | 10 mg/L |
| C. | 15 mg/L |
| D. | 20 mg/L |
| Answer» E. | |
| 20. |
What is the minimum mass loading of nitrogen in domestic wastewater? |
| A. | 2 lbs |
| B. | 4 lbs |
| C. | 6 lbs |
| D. | 8 lbs |
| Answer» C. 6 lbs | |
| 21. |
Which of the following bacteria is used in nitrification process? |
| A. | Escherichia coli |
| B. | Nitrosomonas |
| C. | Morganella |
| D. | Providencia |
| Answer» C. Morganella | |
| 22. |
______ is the biochemical degradation of Organic-N into NH3 or NH4+. |
| A. | Nitrogen fixation |
| B. | Ammonification |
| C. | Nitrification |
| D. | Denitrification |
| Answer» C. Nitrification | |
| 23. |
Nitrogen fixation is the conversion of _________into nitrogen compounds. |
| A. | Ammonia |
| B. | Nitric oxide |
| C. | Nitrate |
| D. | Nitrogen gas |
| Answer» E. | |
| 24. |
Which of the following below represents nitrate ion? |
| A. | NO<sub>2</sub> |
| B. | NO<sub>3</sub><sup>–</sup> |
| C. | NO<sup>–</sup> |
| D. | NO<sub>2</sub><sup>–</sup> |
| Answer» C. NO<sup>‚Äö√Ñ√∂‚àö√ë‚àö¬®</sup> | |
| 25. |
What is the oxidation state of organic nitrogen? |
| A. | -2 |
| B. | -1 |
| C. | -3 |
| D. | +3 |
| Answer» D. +3 | |