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. |
What is the maximum reduced concentration of BOD obtained at the outlet of tricking filter? |
| A. | t40 mg/L |
| B. | t20 mg/L |
| C. | t30 mg/ L |
| D. | t45 mg/L |
| Answer» C. t30 mg/ L | |
| 2. |
The settling tank which is followed after the Trickling filter has which of the following characteristic? |
| A. | tRecirculation is present |
| B. | tLow suspended solids |
| C. | tThe sludge from here is returned to the primary clarifier directly. |
| D. | tHas high BOD |
| Answer» C. tThe sludge from here is returned to the primary clarifier directly. | |
| 3. |
What is the surface area of the River rock (Large) packing material used in trickling filters as the packing medium? |
| A. | t60 m<sup>2</sup>/m<sup>3</sup> |
| B. | t90 m<sup>2</sup>/m<sup>3</sup> |
| C. | t45 m<sup>2</sup>/m<sup>3</sup> |
| D. | t150 m<sup>2</sup>/m<sup>3</sup> |
| Answer» D. t150 m<sup>2</sup>/m<sup>3</sup> | |
| 4. |
What is the surface area of the River rock (Small) packing material used in trickling filters as the packing medium? |
| A. | t60 m<sup>2</sup>/m<sup>3</sup> |
| B. | t90 m<sup>2</sup>/m<sup>3</sup> |
| C. | t98 m<sup>2</sup>/m<sup>3</sup> |
| D. | t150 m<sup>2</sup>/m<sup>3</sup> |
| Answer» B. t90 m<sup>2</sup>/m<sup>3</sup> | |
| 5. |
What is the surface area of the plastic random packing high specific surface area packing material used in trickling filters as the packing medium? |
| A. | t60 m<sup>2</sup>/m<sup>3</sup> |
| B. | t90 m<sup>2</sup>/m<sup>3</sup> |
| C. | t98 m<sup>2</sup>/m<sup>3</sup> |
| D. | t150 m<sup>2</sup>/m<sup>3</sup> |
| Answer» E. | |
| 6. |
What is the surface area of the plastic random packing conventional packing material used in trickling filters as the packing medium? |
| A. | t60 m<sup>2</sup>/m<sup>3</sup> |
| B. | t90 m<sup>2</sup>/m<sup>3</sup> |
| C. | t98 m<sup>2</sup>/m<sup>3</sup> |
| D. | t150 m<sup>2</sup>/m<sup>3</sup> |
| Answer» D. t150 m<sup>2</sup>/m<sup>3</sup> | |
| 7. |
What is the surface area of the plastic conventional packing material used in trickling filters as the packing medium? |
| A. | t60 m<sup>2</sup>/m<sup>3</sup> |
| B. | t90 m<sup>2</sup>/m<sup>3</sup> |
| C. | t140 m<sup>2</sup>/m<sup>3</sup> |
| D. | t45 m<sup>2</sup>/m<sup>3</sup> |
| Answer» C. t140 m<sup>2</sup>/m<sup>3</sup> | |
| 8. |
What is the surface area of the plastic high specific surface area packing material used in trickling filters as the packing medium? |
| A. | t60 m<sup>2</sup>/m<sup>3</sup> |
| B. | t90 m<sup>2</sup>/m<sup>3</sup> |
| C. | t140 m<sup>2</sup>/m<sup>3</sup> |
| D. | t45 m<sup>2</sup>/m<sup>3</sup> |
| Answer» D. t45 m<sup>2</sup>/m<sup>3</sup> | |
| 9. |
When filled which of the following material both nitrogen and BOD are removed? |
| A. | tRiver rock (Large) |
| B. | tRiver Rock (Small) |
| C. | tPlastic High specific area |
| D. | tPlastic random packing-high specific area |
| Answer» B. tRiver Rock (Small) | |
| 10. |
When filled which of the following material only nitrogen is removed? |
| A. | tRiver rock (Large) |
| B. | tRiver rock (Small) |
| C. | tPlastic conventional |
| D. | tPlastic random packing-conventional |
| Answer» C. tPlastic conventional | |
| 11. |
In which type of trickling filter is nitrogen oxidized? |
| A. | tLow or standard filtration rate(Rock type) |
| B. | tIntermediate filtration rate (Rock type) |
| C. | tHigh filtration rate (Rock type) |
| D. | tRoughing (Plastic/Rock type) |
| Answer» B. tIntermediate filtration rate (Rock type) | |
| 12. |
In which type of trickling filter very high power is consumed? |
| A. | tLow or standard filtration rate(Rock type) |
| B. | tIntermediate filtration rate (Rock type) |
| C. | tHigh filtration rate (Rock type) |
| D. | tRoughing (Plastic/Rock type) |
| Answer» E. | |
| 13. |
In which type of trickling filter very low power is consumed? |
| A. | tLow or standard filtration rate(Rock type) |
| B. | tIntermediate filtration rate (Rock type) |
| C. | tHigh filtration rate (Rock type) |
| D. | tHigh filtration rate (Plastic type) |
| Answer» B. tIntermediate filtration rate (Rock type) | |
| 14. |
For roughing type trickling filters what would be the BOD removal rate? |
| A. | t50-80% |
| B. | t60-90% |
| C. | t80-90% |
| D. | t40-70% |
| Answer» E. | |
| 15. |
For plastic type high filtration rate trickling filters what would be the BOD removal rate? |
| A. | t50-80% |
| B. | t60-90% |
| C. | t80-90% |
| D. | t40-70% |
| Answer» C. t80-90% | |
| 16. |
For rock type high filtration rate trickling filters what would be the BOD removal rate? |
| A. | t50-80% |
| B. | t50-90% |
| C. | t80-90% |
| D. | t40-70% |
| Answer» C. t80-90% | |
| 17. |
For rock type low filtration rate tricking filters what would be the BOD removal rate? |
| A. | t50-80% |
| B. | t50-90% |
| C. | t80-90% |
| D. | t40-70% |
| Answer» D. t40-70% | |
| 18. |
For plastic type high filtration rate trickling filters what would be depth assumed while designing it? |
| A. | t1.8-2.4 m |
| B. | t<1.8 m |
| C. | t3-12.2 m |
| D. | t>12.2 m |
| Answer» D. t>12.2 m | |
| 19. |
For rock type low filtration rate trickling filters what would be depth assumed while designing it? |
| A. | t1.8-2.4 m |
| B. | t<1.8 m |
| C. | t3-12.2 m |
| D. | t>12.2 m |
| Answer» B. t<1.8 m | |
| 20. |
For rock type high filtration rate trickling filters what would be the recycling ratio assumed? |
| A. | t0 |
| B. | t1-2 |
| C. | t>2 |
| D. | t>3 |
| Answer» C. t>2 | |