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. |
Calculate the tank volume for the Moving bed bioreactor system for the following data.Flow: 80 m3/h.BOD: 300 mg/LRetention time: 6 hrs |
| A. | 500 m3 |
| B. | 600 m3 |
| C. | 480 m3 |
| D. | 120 m3 |
| Answer» D. 120 m3 | |
| 2. |
Calculate the tank volume for the Moving bed bioreactor system for the following data.Flow: 800 m3/h.BOD: 300 mg/LRetention time: 6 hrs |
| A. | 4500 m3 |
| B. | 4800 m3 |
| C. | 6500 m3 |
| D. | 10500 m3 |
| Answer» C. 6500 m3 | |
| 3. |
Calculate the tank volume for the Moving bed bioreactor system for the following data.Flow: 800 m3/h.BOD: 1500 mg/LRetention time: 8 hrs |
| A. | 5000 m3 |
| B. | 6400 m3 |
| C. | 8400 m3 |
| D. | 9200 m3 |
| Answer» C. 8400 m3 | |
| 4. |
Calculate the tank volume for the Moving bed bioreactor system for the following data.Flow: 500 m3/h.BOD: 500 mg/LRetention time: 8 hrs |
| A. | 800 m3 |
| B. | 4000 m3 |
| C. | 8000 m3 |
| D. | 5000 m3 |
| Answer» C. 8000 m3 | |
| 5. |
What is the standard filling degree of MBBR? |
| A. | 50% |
| B. | 55% |
| C. | 67% |
| D. | 72% |
| Answer» D. 72% | |
| 6. |
What is the diameter of the cylinder? |
| A. | 5 mm |
| B. | 7.5 mm |
| C. | 10 mm |
| D. | 12 mm |
| Answer» D. 12 mm | |
| 7. |
What is the length of the cylinder? |
| A. | 2 mm |
| B. | 5 mm |
| C. | 7 mm |
| D. | 10 mm |
| Answer» D. 10 mm | |
| 8. |
What is the shape of the biofilm carrier? |
| A. | Circular |
| B. | Rectangular |
| C. | Square |
| D. | Cylindrical |
| Answer» E. | |
| 9. |
The biofilm carrier movement is caused by ________ |
| A. | Stirring |
| B. | Horizontal shaft |
| C. | Vertical shaft |
| D. | Agitation by air |
| Answer» E. | |
| 10. |
WHAT_IS_THE_SHAPE_OF_THE_BIOFILM_CARRIER??$ |
| A. | Circular |
| B. | Rectangular |
| C. | Square |
| D. | Cylindrical |
| Answer» E. | |
| 11. |
What is the diameter of the cylinder?$ |
| A. | 5 mm |
| B. | 7.5 mm |
| C. | 10 mm |
| D. | 12 mm |
| Answer» D. 12 mm | |
| 12. |
What_is_the_length_of_the_cylinder?$ |
| A. | 2 mm |
| B. | 5 mm |
| C. | 7 mm |
| D. | 10 mm |
| Answer» D. 10 mm | |
| 13. |
What is the combined BOD and nitrogen removal level for moving bed bioreactor? |
| A. | 3-4 Kg BOD/m<sup>3</sup> |
| B. | 2-2.75 Kg BOD/m<sup>3</sup> |
| C. | 5 Kg BOD/m<sup>3</sup> |
| D. | 6 Kg BOD/m<sup>3</sup> |
| Answer» C. 5 Kg BOD/m<sup>3</sup> | |
| 14. |
What is the BOD removal level for moving bed bioreactor? |
| A. | 3.5-4.5 Kg BOD/m<sup>3</sup>day |
| B. | 2-2.75 Kg BOD/ m<sup>3</sup>day |
| C. | 3 Kg BOD/ m<sup>3</sup>day |
| D. | 5 Kg BOD/m<sup>3</sup>day |
| Answer» B. 2-2.75 Kg BOD/ m<sup>3</sup>day | |
| 15. |
What is the surface area of the media used in these moving bed bioreactor systems? |
| A. | 2000 m<sup>2</sup> |
| B. | 3000 m<sup>2</sup> |
| C. | 200-300 m<sup>2</sup> |
| D. | 400-600 m<sup>2</sup> |
| Answer» E. | |
| 16. |
What is the retention time considered for aeration tanks in a moving bed bioreactor system? |
| A. | 4hrs |
| B. | 5-6 hrs |
| C. | 6-8 hrs |
| D. | 8-12 hrs |
| Answer» D. 8-12 hrs | |
| 17. |
What_is_the_standard_filling_degree_of_MBBR? |
| A. | 50% |
| B. | 55% |
| C. | 67% |
| D. | 72% |
| Answer» D. 72% | |
| 18. |
The biofilm carrier movement is caused by _______? |
| A. | Stirring |
| B. | Horizontal shaft |
| C. | Vertical shaft |
| D. | Agitation by air |
| Answer» E. | |
| 19. |
What part of the tank is used by MBBR for biomass growth? |
| A. | 1/ 4 |
| B. | 1/ 2 |
| C. | 3/ 4 |
| D. | 1/ 1 |
| Answer» E. | |
| 20. |
MBBR was developed based on the activated sludge process and _____ |
| A. | Sedimentation process |
| B. | Clarifier process |
| C. | Aeration process |
| D. | Biofilter process |
| Answer» E. | |
| 21. |
The ions are desorbed after ______ by the biofilm. |
| A. | Nitrified |
| B. | Denitrified |
| C. | Adsorbed |
| D. | Absorbed |
| Answer» B. Denitrified | |
| 22. |
Which ions are present on the charged surface of MBBR? |
| A. | Iron |
| B. | Iodine |
| C. | Aluminium |
| D. | Sodium |
| Answer» D. Sodium | |
| 23. |
Which of the following is not correct with respect to MBBR? |
| A. | Compact design |
| B. | Expandable |
| C. | Multiple pass process |
| D. | Load responsive |
| Answer» D. Load responsive | |
| 24. |
MBBR needs an assistance to maintain biofilm. |
| A. | True |
| B. | False |
| Answer» C. | |
| 25. |
MBBR provides support for both autotrophic and heterotrophic bacteria. |
| A. | True |
| B. | False |
| Answer» B. False | |