MCQOPTIONS
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MCQOPTIONS
This section includes 20 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. |
For rock type low filtration rate trickling filters what would be the recycling ratio assumed? |
| A. | 0 |
| B. | 1-2 |
| C. | >2 |
| D. | >3 |
| Answer» B. 1-2 | |
| 2. |
For plastic type high filtration rate trickling filters what would be the organic loading rate assumed? |
| A. | 0.07-0.22 kg BOD/m3d |
| B. | 0.24-0.48 kg BOD/m3d |
| C. | 0.5 kg BOD/m3d |
| D. | 0.6-3.2 kg BOD/m3d |
| Answer» E. | |
| 3. |
For rock type high filtration rate trickling filters what would be the organic loading rate assumed? |
| A. | 0.07-0.22 kg BOD/m3d |
| B. | 0.24-0.48 kg BOD/m3d |
| C. | 0.4-2.4 kg BOD/m3d |
| D. | >2.4 kg BOD/m3d |
| Answer» D. >2.4 kg BOD/m3d | |
| 4. |
For rock type low filtration rate trickling filters what would be the organic loading rate assumed? |
| A. | 0.07-0.22 kg BOD/m3d |
| B. | 0.24-0.48 kg BOD/m3d |
| C. | 0.4-2.4 kg BOD/m3d |
| D. | >2.4 kg BOD/m3d |
| Answer» B. 0.24-0.48 kg BOD/m3d | |
| 5. |
For rock type of roughing packing trickling filter what will be the hydraulic loading rate? |
| A. | 40-200 m3/m2.d |
| B. | 300 m3/m2.d |
| C. | 500 m3/m2.d |
| D. | 600 m3/m2.d |
| Answer» B. 300 m3/m2.d | |
| 6. |
For rock type of packing in intermediate filtration trickling filters what is the hydraulic rate considered? |
| A. | 4-10 m3/m2.d |
| B. | 10-15 m3/m2.d |
| C. | 20-25 m3/m2.d |
| D. | 25-30 m3/m2.d |
| Answer» B. 10-15 m3/m2.d | |
| 7. |
For rock packing low- rate trickling filters what is the hydraulic loading assumed? |
| A. | 1-4 m3/m2.d |
| B. | 4-8 m3/m2.d |
| C. | 8- 12 m3/m2.d |
| D. | 12-15 m3/m2.d |
| Answer» B. 4-8 m3/m2.d | |
| 8. |
Which type of bacteria are used in trickling filters? |
| A. | Facultative |
| B. | Nitrifying |
| C. | Anaerobic |
| D. | Blue-green bacteria |
| Answer» B. Nitrifying | |
| 9. |
What is necessary prior to trickling filters? |
| A. | Secondary clarification |
| B. | MBBR |
| C. | Grit chamber |
| D. | Primary clarification |
| Answer» E. | |
| 10. |
While designing a trickling filter what would be the depth assumed? |
| A. | 12-15m |
| B. | 4-12 m |
| C. | 16-20 m |
| D. | 20-25 m |
| Answer» C. 16-20 m | |
| 11. |
The spindle is provided at the ______ to support perforated plates. |
| A. | Edge |
| B. | Bottom |
| C. | Top |
| D. | Centre |
| Answer» E. | |
| 12. |
What is the depth of the trickling filter? |
| A. | 0.5-1 m |
| B. | 1-1.5 m |
| C. | 1.5-2 m |
| D. | 2-3 m |
| Answer» E. | |
| 13. |
What is the shape of a typical trickling filter? |
| A. | Circular |
| B. | Cylindrical |
| C. | Square |
| D. | Rectangular |
| Answer» B. Cylindrical | |
| 14. |
Which of the following causes thickening of the biofilm? |
| A. | Reduction of intake wastewater |
| B. | Rapid growth of organisms |
| C. | Reduction in air supply |
| D. | Increase in acidity |
| Answer» C. Reduction in air supply | |
| 15. |
Which of the following is not used as a media for trickling filters? |
| A. | Sand |
| B. | Geotextiles |
| C. | Gravel |
| D. | Paper |
| Answer» E. | |
| 16. |
__________ in trickling filter contains many species like bacteria and round worms. |
| A. | Treated water |
| B. | Wastewater |
| C. | Biofilm |
| D. | Air influent |
| Answer» D. Air influent | |
| 17. |
The supernatant from the tank flows into a ____ |
| A. | Trickling filter |
| B. | Dosing device |
| C. | Pumping station |
| D. | Sedimentation tank |
| Answer» C. Pumping station | |
| 18. |
Trickling filter can also be called as a biofilter. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 19. |
Splashing helps in improving aerobic conditions. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 20. |
Who used the trickling filter for the first time? |
| A. | Didden |
| B. | Streeter |
| C. | Thomas |
| D. | Newton |
| Answer» B. Streeter | |