MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not a drying bed? |
| A. | Wedwire beds |
| B. | Artificial media |
| C. | Filter press |
| D. | Conventional sand |
| Answer» D. Conventional sand | |
| 2. |
In which of the following process, the sludge is dried and disposed in land? |
| A. | Centrifugation |
| B. | Drying lagoon |
| C. | Drying bed |
| D. | Vacuum filter |
| Answer» D. Vacuum filter | |
| 3. |
The dewatered sludge cannot be disposed by ___________ |
| A. | Composting |
| B. | Heat drying |
| C. | Acid fermentation |
| D. | Incineration |
| Answer» D. Incineration | |
| 4. |
7% of solids concentration of thickened sludge is obtained from gravity thickener. What is the type of sludge? |
| A. | Primary sludge |
| B. | Secondary sludge |
| C. | Tertiary sludge |
| D. | Activated sludge |
| Answer» E. | |
| 5. |
The design Hydraulic loading rate of the gravity thickener is _______ m3/m2/day. |
| A. | 20 |
| B. | 39 |
| C. | 40 |
| D. | 85 |
| Answer» B. 39 | |
| 6. |
The design solid surface loading in an activated sludge process is ___________ |
| A. | 10 kg/m2/day |
| B. | 25 kg/m2/day |
| C. | 15 kg/m2/day |
| D. | 35 kg/m2/day |
| Answer» C. 15 kg/m2/day | |
| 7. |
THE_DEWATERED_SLUDGE_CANNOT_BE_DISPOSED_BY?$ |
| A. | Composting |
| B. | Heat drying |
| C. | Acid fermentation |
| D. | Incineration |
| Answer» D. Incineration | |
| 8. |
Which of the following is not a drying bed?$ |
| A. | Wedwire beds |
| B. | Artificial media |
| C. | Filter press |
| D. | Conventional sand |
| Answer» D. Conventional sand | |
| 9. |
In_which_of_the_following_process,_the_sludge_is_dried_and_disposed_in_land?$ |
| A. | Centrifugation |
| B. | Drying lagoon |
| C. | Drying bed |
| D. | Vacuum filter |
| Answer» D. Vacuum filter | |
| 10. |
Which of the following is not a part of dewatering process? |
| A. | Drying bed |
| B. | Air flotation |
| C. | Vacuum filter |
| D. | Drying lagoon |
| Answer» C. Vacuum filter | |
| 11. |
Which of the following is not suitable for dewatering of raw sludge? |
| A. | Centrifugation |
| B. | Drying lagoon |
| C. | Drying bed |
| D. | Vacuum filter |
| Answer» C. Drying bed | |
| 12. |
In which of the following method, the sludge is rotated for dewatering process? |
| A. | Centrifugation |
| B. | Drying lagoon |
| C. | Drying bed |
| D. | Vacuum filter |
| Answer» B. Drying lagoon | |
| 13. |
Which of the following is not used for drying of sludge? |
| A. | Multiple effect evaporation |
| B. | Dual effect evaporation |
| C. | Rotary dryer |
| D. | Spray dryer |
| Answer» C. Rotary dryer | |
| 14. |
7% of solids concentration of thickened sludge is obtained from gravity thickener.What is the type of sludge? |
| A. | Primary sludge |
| B. | Secondary sludge |
| C. | Tertiary sludge |
| D. | Activated sludge |
| Answer» E. | |
| 15. |
Which of the following process is not involved in sludge thickening? |
| A. | Gravity thickening |
| B. | Vacuum filter |
| C. | Air flotation |
| D. | Centrifugation |
| Answer» C. Air flotation | |
| 16. |
The design Hydraulic loading rate of the gravity thickener is _______ m3/m2/day. |
| A. | 20 |
| B. | 39 |
| C. | 40 |
| D. | 85 |
| Answer» B. 39 | |
| 17. |
The design pressure of ____ is applied on pressure type flotation device. |
| A. | 1kg/cm<sup>2</sup> |
| B. | 2kg/cm<sup>2</sup> |
| C. | 3kg/cm<sup>2</sup> |
| D. | 6kg/cm<sup>2</sup> |
| Answer» D. 6kg/cm<sup>2</sup> | |
| 18. |
Which of the following plant nutrient is not found in municipal sewage? |
| A. | Arsenic |
| B. | Phosphorous |
| C. | Potassium |
| D. | Nitrogen |
| Answer» B. Phosphorous | |
| 19. |
The design solid surface loading in an activated sludge process is |
| A. | 10 kg/m<sup>2</sup>/day |
| B. | 25 kg/m<sup>2</sup>/day |
| C. | 15 kg/m<sup>2</sup>/day |
| D. | 35 kg/m<sup>2</sup>/day |
| Answer» C. 15 kg/m<sup>2</sup>/day | |